Post Meniscus Repair Surgery

SMC Pentax-M 200mm f:4

Let's take inventory of my small equipment to me that I ... After 135mm , I wanted a slightly longer focal length - the 135mm, it will not fetch you a little bird on a high Brache, except to climb yourself the tree.

So I went back over the bay with my little basket, after 50mm f: 1.4 British and 135mm f: 3.5 Swiss Hellenic is a 200mm (always in the range of Pentax SMC-M) I've dug up for a very reasonable sum.

• Type: Fixed focal lens manual
• Manufacturer: Pentax
• Model: SMC Pentax-M 200mm f: 4
• Purchase Date: November 4, 2007 ( on ebay, from Greece)
• Filter Holder: 52mm
• Sunshade integrated
• Aperture: f / 4 to 32, eight blades
• Focus: 2m to infinity

This has the advantage of being very compact in terms of its focal length. A little heavy, perhaps: it does not plastoc subsequent series F, a little more cumbersome as still as the 135mm, they can really take with you without even thinking. Question

image quality, no bad surprise from the first test I scored quite satisfactory. The grip is pleasant, well balanced the resulting image has a good definition, even a large opening - well, its openness: it's f: 4 'only' . Knowing that the camera in hand, it is difficult to go below 1 / 250 th second, it is understandable that it is not so common to go beyond f: 8, especially winter. The image quality at full aperture is welcome!

I use a lot more this goal in recent months, for two reasons: the purchase of a 300mm (which I will) helped me appreciate how much this was actually 200mm so little and light, and then one of the benefits of fatherhood, is that you can use the stroller to lug around the tote photo, it was quite full!

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SMC Takumar 1:3.5 / 35

To complete the kit accompanying the paternal SP500 after 55mm and 135mm , the youngest: a wide angle, 35mm. 35mm, it is not very wide angle, but it is a focal length that I like because, unlike 28mm, deformations straight lines (barrel effect) are not too pronounced. Practice, especially for photos of the building.

• Type: Fixed focal lens manual
• Manufacturer: Asahi Pentax
• Model: Super-Takumar 1:3.5 / 35
• Focal Length: 35mm filter holder
• ;:
• 49mm Aperture: f/3.5 to 16

A small feature of this range of objectives: the objective of medium length is physically longer than the general angle. Pictured from left, they are focal increased: 35, 55 and 135mm, left to right. This is not the case with ranges latest: hunting millimeter and progress of optical helped shorten the 50mm, while the large angles are nearly incompressible: the distance to the film being in any way higher than their focal length, they contain necessarily divergent lenses to compensate for this difference. That is why the goals most compact frame Pentax are now 40mm: the shorter focal length for which we can do without negative element in front of goal.

This is not troublesome for the money by cons for SLR APS-C is a bit annoying, since the objective corresponding to a 50mm would be 28mm, which one would like that it is the smallest (and most open) possible ... No simple remedy to this concern, but much closer to the front of the sensor housing, thus eliminating the compatibility of these cases with optic old - a strong point of Pentax in the heart of its marketing communications ...

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SMC Takumar 1:3.5 / 135

The following objectives SP500 : after 55mm the 135mm. A short telephoto lens handy, cf. what I said about SMC Pentax-M 135mm f: 3.5 .

• Type: manual lens fixed focus
• Manufacturer: Asahi Pentax
• Model: Super-Takumar 1:3.5 / 135
• Focal Length: 135mm
• Holder Filter: 49mm
• Aperture: f/3.5 to 22

Comparison with SMC Pentax-M 135mm f: 3.5 shows the evolution of optical Pentax during the 1970s: they both have a filter holder 49mm (while the immediate successor of the SMC-Takumar, SMC Pentax (not M) bayonet was in 52mm), but the Takumar is more end, the tube being adapted to mount M42, narrower, and it is against the longer, have not benefited from advances in optics of the Pentax-M.

In terms of image quality, I have not noticed any obvious difference, in terms of convenience, note that the Pentax-M 135mm features a retractable sunshade, in-lens ;: the advantage of having a little more leeway in terms of size, I suppose. The Takumar was sold with a metal hood, but I noticed it caused a significant vignetting of the images: it is too long, while the literature gives the Pentax as suitable for this purpose ... 'll Understand.

Note on the right picture, some features of the draft final optical Asahi Pentax screw: the small pin that protrudes into the frame. When the lens is mounted, the housing press stud is now open aperture, it's only permanently active when the cell to measure light that the diaphragm is released. On the side near the frame, button, zipper Auto / Man : it only serves to disengage the previous mechanism, where we mount the lens on a box of another brand which the spike clutch would end down permanently. Obviously, given in 2008, the reference Auto let wait much more ... The charm of old equipment!

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Super-Takumar 1:2 / 55

After the presentation of SP500 , its goals - the good old Takumar mount M42 ...

As was the practice before it starts to sell the zoom with a vengeance, the kit that we had suggested to my dear father consisted of housing, some eccessoires and three goals : a target of average focal length (55mm) wide angle (35mm) and telephoto (135mm).

• Type: manual lens fixed focus
• Manufacturer: Asahi Pentax
• Model: Super-Takumar 1:2 / 55
• Focal Length: 55mm
• filter holder: 49mm
• Diaphragm: f / 2 to 16, six blades

is the basic objective of all, curiously, while the other two are in the range SMC Takumar ( super multi coated ), this n is that the range Super-Takumar, including multi-layer coating is deemed to be a little worse ... But this is by far the one I used most often, and it has never particularly been a problem. In a pinch, by comparing all things being equal with the target MSC, there is slight color shifts ... And yet, it is not clear.

course, it would certainly be better with the SMC Takumar 1:1.4 / 55, which was absolutely unaffordable at the time but found for cheap now ... But it takes very good pictures with it.

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Asahi Pentax SP500

a break in the descriptions of my equipment to mention a few devices that I used or that I use although they are not mine, and in particular apparatus and step-father's paternal. Starting with a device which, if not the buyer, I was one of the first topics: Asahi Pentax for my dad.

• Type: SLR
• 35mm Manufacturer: Asahi Pentax
• Model: Spotmatic SP500
• Year of manufacture: 1980-1986
• Purchase date: early 1972 (not by me, I was a year!)
• Mounting: screw type M42
• Shutter: double curtain side-scrolling, 1 s to 1 / 500 th (actually the speed at 1 / 1000 th works although it is not marked on button speeds), Bulb

see this unit talk about the entries in photos and days ; the latest was illustrated by the same photo as this one.

In any case, a device particularly robust, as his successor the Pentax K1000 that I bought a copy a few days ago. The K1000 is identical to the Spotmatic (rather than the SP1000 SP500, but they are virtually identical) to the flash shoe near (the Spotmatic do not) - only changes the lens mount. The mount of M42 Spotmatic is much smaller than the K bayonet who succeeded him, so they appear larger than the K1000: more space free on the front ... But I have a case is designated for the Spotmatic (as marked Honeywell Pentax, the brand under which Asahi Optical Co. for providing its Spotmatic the Americas): it is exactly the right size for the K1000.

Asahi Pentax was the last major manufacturers to have kept the screw mount, until the early 1970s. They were not bad, these horses, but we must recognize that change is on target when mop requires a certain dexterity. Moreover, if a tip at the frame allowed the development diaphragm open, it had to close it when measurement of light, while with K-mount, everything is done and it is open aperture at the time of shooting it is adjusted. This allows you to work simultaneously on the development and measurement of light, then it is difficult to adjust the focus iris closed, especially if you are at f: 16 or beyond ... On the other hand, no need for button control depth of field (which is a clutch mechanism under open aperture), because the passage in the measurement mode automatically.

I took my first pictures with this camera in the 80s when I was 11 or 12 years (the advantage a rugged) I made a half-dozen rolls during my years of college and high school from 1982 to 1987 (with some moderation, therefore, the development costs being fabulous in terms of my money pocket) I borrowed again during my trip to South Africa in 1997. But it is always a pleasure to handle, although I now use my own equipment to take pictures. To recover the memory of those early gestures clicks.

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YashicaMat 124G

dint make mumuse with dandruff, you want to have anything other than the traditional perforated films 35mm (format 135), for example (chronological classic) format 120 : rolls 6cm wide. For that, it is still necessary to have a camera that uses this format, knowing that the legendary Hasselblad are certainly excellent, but expensive, even very old and used, and most of Kodak Brownies found in the flea markets are totally unusable.

A good compromise: the camera reflex twin goals. The most famous in this genre is the Rolleiflex, but again, it costs a crazy price, even used. A little less insane than Blad, but crazy nonetheless, when we have casual use. So, it's on a device relatively new, and manufacturing in Japan, the YashicaMat 124G.

• Type: SLR 6 × 6 to twin objectives
• Manufacturer: Yashica
• Model: YashicaMat 124G
• Year of manufacture: 1971 - ?
• Purchase Date: October 21, 2007

The principle of these devices: the two objectives have a formula Optical identical and are set to the same front moves and which moves forward or backward to complete the development. The top one allows targeting, through a mirror and a frosted one looks at the top (see third photo). The lower one is facing the film, it was through him that is shooting. It has the advantage of focusing directly, constantly on the frosted the sharpness of the image, without the need for a telemetry system, without the disadvantage of a movable mirror, mechanically sensitive ( especially as the mirror is larger than 35mm).

The goal is not interchangeable shutter it is integrated, it is a radial valve located at the focal point of the lens, not a horizontal or vertical curtain located at the focal plane, ie just before the film. Advantage: the focal point, as its name suggests, the light corresponding to the image is almost together at one point, the opening and closing the shutter is simultaneous for all the image.

On a 35mm case, however, the opening of the image is shifted in time by following the path of the curtain - even if the entire image receives the same amount of light because the second curtain (which ", closes the window") moves in the same direction as the first. The exhibition is just shifted in time from one end to another image, a few fractions of seconds. It's trivial for pictures in natural light, by cons for the flash picture is more annoying: the flash is anyway much shorter than the opening time of shutter must ensure that the first curtain is finished and open the second has not begun to close when it starts Lightning - otherwise a part of the photo is taken with flash and one without. At high speeds, close the second curtain starts before the first has finished open: no flash picture possible. We must therefore follow an exposure time limit for the camera flash, this is called speed flash sync (between 1 / 60 and 1/125th following boxes).

On radial valve housings, therefore, no problem: you can take pictures with flash at any speed, which is interesting when using the flash as a supplement and not as the sole source of light.

addition to these theoretical advantages, the device is YashicaMat most sympathetic side of the crank film advance (see photo 2) is a bit noisy and not very convenient, but deliciously retro. It has a photocell (the small circle above objectives, the first picture), but on mine like many of her contemporaries, she no longer works. The lens is also of excellent quality, enjoying the same treatment as that of multilayer casings 35mm from the same period. I owe him the coup some pictures which I am relying more r: is not it ultimately the best argument that can be given for a camera?

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SMC Pentax-A 28mm f:2.8

Although I tend more toward the telephoto Avoi some great angles do peuit not hurt. I came across this little 28mm by chance on the bay. Not too expensive, and more SMC Pentax-A, non-M, which does not spoil anything.

• Type: fixed lens, manual focus and iris automated
• Manufacturer: Pentax
• Model: SMC Pentax-A 28mm f: 2.8
• Purchase Date: September 27, 2007
• filter holder: 49mm
• Aperture: f/2.8 to 22, five blades
• Focus: 30cm to infinity

So why A ? That's automatic simply: the diaphragm of the lens can be set directly by the housing, without user intervention. If the box has a program mode, it will even automatically adjust the aperture and shutter speed, depending on available light and sound or its programs.

Specifically, what's the difference? Unlike the F-Pentax lenses, there is no integrated electronics, and mechanical couplings are very close to those goals Pentax-M. But not quite ...

First, there are a number of electrical contacts that allow the case to know the characteristics of the target. Objective side, in fact, there is not actually contact the contrary, a small plastic pellet is at the location of some of the switches used for housing insulation, for others, contact is established by the metal frame. These contacts or absence of contact can encode openings maximum and minimum diaphragm history that the case does not ask the impossible.

An additional contact is a bit unusual, distinguished on the fourth picture, roughly halfway between the two screws on the frame. It corresponds to the A position marked on the aperture ring (see third picture) and when this position is chosen, this little metal point juts slightly, making contact which means the case that one wishes to use the auto iris. Note that if the case does not use these contacts, the target behaves almost as an objective of the series Mr.

A more subtle differences: all mount lenses K have two mechanical couplers. One relays in case the position of the aperture ring and the second blocks the diaphragm in the open position to develop and adjust speed and aperture while keeping the lens wide open, which is much more convenient . Simply, the case made its claculs taking into account the width of the diaphragm when it is closed, information provided by the first coupler; when it starts shooting, the second coupler recedes, leaving the diaphragm closed.

On the objectives of series A, the second coupler is slightly modified its mode of action is more precise and carefully calibrated (the small bitonnieau metal visible on the top of the frame on the fourth photo). Result: while for the goals of K-series or M, his action was an all or nothing (keep the iris open, or back completely so that it closes at the selected position on the ring), with the objectives A, the case can not roll back the coupler only partially, leaving the diaphragm close, but only chosen by opening the housing. This is how the opening is chosen.

course, on my boxes ME Super or MX, it makes me look good: these packages do not have the ability to control the diaphragm and a M series lens would have given exactly the same result . For cons, the P30T (which I am separated from) the MZ-10 MZ- and 5n have this capability, and the Pentax digital SLR cameras as well, which is seriously taken up the series lenses A!

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Flash Cobra D500 Dedicated + Pro Grip

I was not and am still not a big flash pros; long, I only used the flash, plus Sunpak where it was not enough. Never had very good results with this flash, so I had decided to buy something else ...

• type electronic flash to TTL or autonomous, manual zoom and tilt and swivel head with extra flash front
• Manufacturer: Cobra
• Model: Cobra Twin D500 module Pentax
• Guide Number: 30m focal length averaged 100 ASA
• Accessories: pro-grip and bracket for remote mounting (see picture), color filters
• Purchase Date ;: September 26, 2007.

A purchase of the bay, in its British version, a disappointment if the animal is friendly at first, it is also a construction very robust. She had obviously spent his life in its packaging, and probably in a little conditioning: the plastic was completely cooked. The flash is mounted on the dedicated module manufacturer by a system of small pins, the plate on which were these pins standing on the grip, with a few screws into the plastic body - which had broken at that specific location. I managed to fix loosely with bolts and nuts (seen in photos, in setting the flash on the handle), but I dare not use it for fear that I fall into dust in the hands ...

The vendor, after being shot a little ear, paid me the grip. And finally, the part that I use most is the arm that screws under the unit, and I use with other flash ...

Golden Rule confirmed thus: when you buy used, target the strong. I learned the lesson, I no longer buy as original elements Pentax!

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Tubes d'extension macro

The macro-picture, what is the art of photographing very small objects, and they appear larger. Two possible approaches to the problem: get closer to advantage, or grow older.

The first possibility, it is the fashion macro small digital cameras and more generally, some zooms: decreasing the minimum distance of development, we photograph more closely, so the object is bigger on the plate resulting. This is made possible targets baptized macro by manufacturers: the optical panel can benefit advance (you've probably seen: the objective is growing " , especially since we want to develop closer), which allows to develop two or three times closer than with a normal lens - 23cm with the SMC Pentax-M 50mm f: 4 macro, cons 45cm with 50mm f: 1.4 . This at the cost of opening up much less.

A related possibility, which I will: the close-(close-up lenses ), returning to put his glasses lens so he could see closely, it will of course remove them to see by far, more than fifty years who read me see what I mean.

The alternative then: grow more. For this, the method is to remove the entire lens of the receiver (film or sensor). For optical reasons I'll spare you, but who are well scribbling with paper and pencil, it grows much the resulting image; by cons, we lose practically possible to develop: the larger the elongation, the larger the range of focus becomes small, situated a short distance in front of goal.

To do this, devices without lenses, which are inserted between the lens and body: the bellows, which provides for removal (and hence magnifications) variables, extension tubes, which have a longer fixed helical extension tube, intermediate between the two: a tube with adjustable length.

I wanted to explore the possibilities of macro without breaking the piggy bank, so I bought a set of extension tubes low end, to see what happens.

• Type: set extension tubes macro
• Manufacturer: unknown ( made in China )
• Purchase Date: August 22, 2007
• Composition: Adapter Pentax K front and rear, tubular screw (60 × 0.75 mm) No. 1, 2 and 3;
• Length: 12 to 60mm following composition;
• Magnification (for a 50mm setting at point at 45cm): 1:0,22 (adapters only) to 1:1,31 (adapters and tubes 1, 2 and 3).

note in passing that the use of macro is to give the magnification on the sensor (the film, in my case). 1:1 means that a 24mm will be the full height of the frame; over the denominator, the more it grows.

What about this game tube? It allowed me to do what I wanted, to discover the macro cheaply. However, the system is screwed tube adapters + malcomode strong, especially as the threads seize up mediocre easily. In short, The settings K adapters, I do not install it on my boxes without fear that they stay there forever ... For further use, it will move to material of better quality.

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SMC Pentax-M 135mm f:3.5

There are photographers who tend to the vast horizons, to the wide-field and others who go instead to the significant detail, to a more close and I'd rather be the latter. So, I tend to alternate between medium and telephoto lens, also without going into very long lenses - regardless of which pose cost problems quickly weight and bulk, not to mention almost need to use a tripod in most situations.

Result: As soon as I can, I bring with me a 135mm. It was part of the paraphernalia of the Spotmatic father and I had bought one as soon as I started to get into the purchase of used equipment: Tamron 135mm f the : 2.8 I told you, very good but a little heavy. I used the earlier 100-300mm zoom sold with the Pentax MZ-10, but he had accumulated a sizeable space with optical quality not above any hint ... The objective

135mm Pentax-M f: 3.5, if my memory is bought at a good ebayers Swiss, is particularly timely complete my collection.

• Type: Fixed focal lens manual
• Manufacturer: Pentax
• Model: SMC Pentax-M 135mm f: 3.5
• Purchase Date: 19 September 2007 (on ebay, from Switzerland)
• Filter Holder: 49mm
• Sunshade integrated
• Aperture: f/3.5 to 32, eight blades
• Focus: 1.5m to infinity

The 135mm f: 3.5 M series is above all a marvel of miniaturization: it weighs 270g (according to the site of Bozhidar Dimitrov KMP) is less than 7cm long when you put the point at infinity and has a filter holder for 49mm diameter, so the same wide-angle lenses or average focal length of the series - like the excellent 50mm f: 1.4 I told you about. It also has a small visor integrated practice as any.

result is a goal that I take with me as often as possible in your bag or in her case to him, a little dented - it's a sign that he lived. and I like the images it gives me , for example in combination with films with soft colors such as Fuji or Pro400H Pro800Z: shades of subtle effects of depth of field harmonious ... I still do not separate myself soon.

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SMC Pentax-M 50mm f:1.4

I spoke last week of targets purchased and resold; it, I do not separate. That is what I best, simply.

• Type: Fixed focal lens manual
• Manufacturer: Pentax
• Model: SMC Pentax-M 50mm f: 1.4
• Purchase Date: September 5, 2007
• Filter Holder: 49mm
• Aperture: f/1.4 to 22, eight blades
• Focus: 45cm to infinity

All accounts, facts, set goals Pentax-M is my favorite . These goals are fully manual (no auto-focus, or control of the diaphragm by the case) very robust and compact - which distinguish them from the previous series (called "Pentax-K, first set of objectives Pentax bayonet), it is precisely their size and low weight to equal optical quality. As a result, much of these goals (28 to 135mm included) have the same diameter filter holder at the front of the lens, 49mm, which is my time convenient.

When you give the reference of any goals, we give two parameters: the focal logueur, which, depending on the size of the sensor (or film component), gives the magnification, and the maximum aperture of the objective, which indicates the maximum amount of light that can capture, aperture wide open. A very large maximum aperture assumes a superior optical quality - after all, with an aperture of pinhole can take good pictures without the use of objectives at all. In short, more objective can open big, it's best - and most expensive, of course.

The amount of light reaching the sensor depends on openness, it also depends on the focal length. To allow comparisons between the values of an optical diaphragm to the other, it expresses these values not in cm or 2 cm but a fraction of the focal length f / 4, f/16, f/5.6 ... In this way, the amount of light reaching the sensor with a diaphragm (say, f: 5.6) is the same regardless of the type of lens used, wide angle or telephoto lens. And exposure time that will result will also be the same. Corollary: As these are fractions, more openness, the greater the value is small. a lens at maximum aperture of f: 2.8 therefore gives a more objective f: 3.5.

Hence the interest of the Pentax f: 1.4: it allows to take pictures even in low light . And, like who can do more can do less, he, at smaller apertures, a fine image much larger than his little friends who are there at the end of the race. Bre: the ideal goal, or not far away.

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Bague Tamron Adaptall

logical complement Tamron Adaptall 28 and 135mm : the adapter ring for my favorite mount, that is, of course, Pentax K mounts

• Type: ring lens adapter
• Manufacturer: Tamron
• Model: Tamron Adaptall Pentax K
• Purchase Date: August 3, 2007
• Auction date: November 9, 2007
• inner frame: Pentax K mount external
• : Tamron Adaptall

The thing is, since there are boxes on the market with interchangeable lenses, manufacturers have never been able to agree on the interface between body and lens: the frame. Regarding boxes 24 × 36, the only mount shared relatively among many manufacturers is the 42mm screw mount (M42), used by many manufacturers including German, then resumed by Pentax for its first cases (until Spotmatic) and Russian manufacturers, which produced essentially copies of German models .

The problem is that changing a lens with screws, it takes some time - not much, but still ... Hard to do with one hand anyway, even if I changed smoothly M42 goals while walking at a brisk pace through vacant lots in South Africa. Furthermore, when one wishes to connect the camera and lens, for example to indicate to the case that the diaphragm will use it without closing it before the picture is taken, it raises complex engineering problem.

All manufacturers have therefore produced their own beast. Pentax is the K bayonet, a system to lock rotation of 30 ° - a system in which the brand has remained true to this day, unlike its competitors who have striven to render obsolete their own goals Changing Frame (in midstream course). It has been enriched by new functionalities: adjust the diaphragm housing (KA) Autofocus (KAF) ... but still, a Pentax K lens in the early 70's still used on a K20D digital art.

However, the incompatibility between frames manufacturers (except that Ricoh has chosen the K-mount) problem for manufacturers of optical self as Tamron: it was not profitable to produce as many models as manufacturers, even if the optical part remained the same. The solution: produce lenses truncated, with a streamlined frame and offer a broadest range of adapters to be inserted between the lens and body. That's what you see here.

That said, this ring me two problems: first, I had only one to two objectives - the disassembly / assembly of the Adaptall ring is much more tedious than a lens change on the housing . And then it was a ring Adaptall short, so with K-mount, while a ring Adaptall 2 (KA mount) would have allowed me to use these objectives in program mode.

Anyway, I solved the problem: I sold ring and objectives, and bought the same optical Pentax lens!

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Tamron Adaptall 2 135mm f:2;8

Sold with Pentax ME Super well Tamron Adaptall the 28mm f: 2, 8 and Riconar 55mm 1:2.2 a Tamron telephoto lens with a very good bill ...

Tamron Adaptall 2 135mm f: 2.8, seen alone, with the 28mm Adaptall ring and with his and visor deployed.

• Type: Fixed focal lens manual
• Manufacturer: Tamron
• Model: Tamron 28mm 1:2.8
• Purchase Date: August 3, 2007
• Auction date: November 9, 2007
• filter holder:
• 55mm Aperture: f/2.8 to 22, six blades
• Focus: 1.5m to infinity

Of the three, is by far the greatest one I used - it was the trip to Denmark , unlike the case Pentax ME Super that I had not tested enough to take him away. He had me there, mounted on the P30T , photos of which I am very happy - as indeed in Paris, with the ME Super . Its large aperture (evident on the front view) can make things very satisfactory, that we want travaiuller by small light or just play with depth of field.

The 135mm is not a super-telephoto: not just want to make a tit at the other end of a field or a starlet in her pool. Rather, the objective of the small detail that is being sought, the narrowing of the voluntary field of vision. A bit long for portrait or photo social cons by, where, if you want a TV, a 85mm or a 100mm rigor are more comfortable. But as you can not have everything, I find it a fixed lens particularly useful.

I sold this objective (as that the 28mm) when I acquired my Pentax lenses of focal length equivalent. But I admit it, I regret it a bit.

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Tamron Adaptall 2 28mm f: 2, 8

Included in the lot of Pentax ME Super : Tamron Adaptall two goals 2 and a Tamron Adaptall ring (short). I have little use the Tamron Adaptall 28mm f: 2.8, a little too big and too heavy for the limited use I make of these focal lengths, even when I used without problem time time. But I've since replaced by M Pentax lenses, better and lighter - the 35mm and 28 mm together must weigh less than the Tamron ...

• Type: Fixed focal lens manual
• Manufacturer: Tamron
• Model: Tamron 28mm 1:2.8
• Purchase Date: August 3, 2007
• Auction date: November 9, 2007
• Filter Holder: 52mm
• Aperture: f/2.8 to 16, five blades
• Focus: 40cm to infinity

That said, it is objectives particularly robust and optically well damn - Little deformation for a 28mm. A good way to extend its focal inexpensively available!