3 user review

February 5, 2016 by tyson robichaud photography in Photography gear and tagged 25mm f/0.95, cheap, compact, depth of field, dof, f/.95, fast, Fun, lens, m43, micro four thirds, Mitakon, night, photography, shallow, small, Speedmaster, Zhongyi, ZY Optics | 38 Comments

Small, sharp, fast, relatively light and comparably inexpensive. All things I love in a lens. ZY Optics has produced yet another ultra fast option for micro 4/3 shooters, but a first option available in a dedicated mount, faster than f/1.4, new for under $400.

The question now stands, how does this fit in with all the other standard/normal lens offerings within the micro 4/3 landscape? Well, more easily than you might think. While not perfect, it definitely has enough going for it to justify a look. C’mon in for my thoughts and some tests against the Pana-Leica 25mm f/1.4 Summilux…

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*How do aperture and focal length affect the DOF or exposure on different sized sensors?

July 16, 2012 by tyson robichaud photography in General ramblings, Photography tutorials and tagged 35mm, aperture, APS-C, depth of field, digital, dof, film, format, four thirds, full frame, lens, micro 4/3, photography, sensor | 14 Comments

Okay, much like the “effective focal length” discussions, there seem to be many “effective aperture” discussions going around as many of these mirrorless interchangeable lens compact system cameras begin to really round out their lens offerings. Well, I guess the micro 4/3 system has while the Samsung NX is getting there and Sony NEX system users still have a small handful of options, but not really here nor there. The fact that so many lenses can be adapted across various formats can complicate the discussion. Along with those who shoot with APS-C DSLR cameras, all references for focal length and depth of field seem to fall back to a full frame/35mm sized sensor as the benchmark. There are some misconceptions as to how the aperture, or focal length affects the exposure or depth of field in these varying formats.

C’mon in, we’ll straighten this all out.

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