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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!

Probleme Installation Windowblinds 7

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!