Michael Reichmann's take on smaller full frame Sony FE mount lenses

Started Dec 18, 2013 | Discussions thread
CharlesB58 Veteran Member • Posts: 8,951
Re: Michael Reichmann's take on smaller full frame Sony FE mount lenses

honeyiscool wrote:

amtberg wrote:

I might be mistaken, but I don't think that the analogy to film rangefinder camera's is all that useful. Unlike film, digital chips are sensitive to the angle of like striking the sensor surface. I think that's why wide angle film camera lenses produce poor results with digital cameras. It may be that this limits the ability of lens manufactures to miniaturize digital full-frame lenses.

Or not.

Fair. But why is the 55mm f/1.8 FE lens twice the size of even the 50mm f/1.4 Alpha mount lens? I just think there's something wrong with the FE mount if its lens sizes are no smaller than comparable SLR lenses.

And oops, I used the wrong picture for the 55mm vs. Leica comparison and the Nocti is in fact larger than the 55mm f/1.8, but the 55mm f/1.8 is still considerably larger than the Leica 50mm f/1.4, as well Sony's very own 50mm f/1.4:


There are a number of factors that affect lens size in addition to focal length, aperture and the format. The 55mm FE lens is made by Zeiss, a company known for making "robust" lenses due to heavy duty construction and optical formulas that help resist aberrations due to temperature or wear and tear.

Lenses for Leica Digital M cameras don't have AF motors, which has a small impact on their size.

The difference is going to be greater the longer the focal length. While the FE 24-70 f4 is smaller than the Alpha 24-70, and not much bigger than the m.zuiko 12-40 f2.8, if you compare the FE 70-200 f4, it's about the same size as other 70-200 f4 lenses, but notably larger than the Panasonic 35-100 f2.8 It's roughly the same size and weight as the Zuiko 50-200 f2.8-3.5, with half the reach.

Sure, the A7 and kin will lure some people from m4/3. It already has. I don't think it's quite the threat that the article implies, at least until Sony decides to make it a camera system that is actually more than a nice sensor in a clunky set of bodies with noisy shutters and stripped down features.

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