Hunting Preserves Moose

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.