Does the anti-aliasing (AA, or A-squared) filter in the A7 cost much in sharpness? I thought I’d find out. I took the super-sharp Zeiss 135mm f/2 APO-Sonnar ZF.2 and took pictures of the ISO 12233 target using studio strobe lighting and both the Leica M240, which has no AA filter, and the a7, which does…. [Read More]
Archives for 2014
Max in-camera ISO for the Sony a7
ETTR is only a useful exposure strategy at base ISO for ISOless cameras like the a7. What’s the maximum ISO you should use on the a7? There are three ways that I know to find out. The first is to minimize read noise as referred to the input of the pre-ADC amplifier. If you’re trying… [Read More]
135 Telyt on M240, 135 APO-Sonnar on Sony a7
Looking for bargain camera/lens combinations that can produce great image quality is fun. How about the Carl Zeiss 135mm f/2 APO-Sonnar ZF.2 on the a7 with the Novoflex adapter? Can it compare to the much more expensive (three times as much !) combination of the 135mm f/3.4 Leica APO-Telyt on the M240? Here is the… [Read More]
Leica 90 ‘cron on M240, Zeiss 100 Makro on a7
Are there other lenses with prices less lofty than Leica glass that combine with the a7 to yield similar or better performance? Can the Carl Zeiss 100mm f/2 Makro-Sonnar ZF on the a7 with the Novoflex adapter hold its own with the 90mm f/2 APO Summicron-M on the M240? I picked this scene (shown with… [Read More]
Leica 50 ‘lux on the M240, Sony 55 FE on the Sony a7
I’d had really good luck with the Zony 55 (official name: Carl Zeiss 55mm f/1.8 Sonnar FE) on the a7R, and I expected superlative results on the less-demanding a7. Just to make things interesting, I compared the combination to the Leica 50mm f/1.4 Summilux-M ASPH on the M240. In some ways, it’s a fair comparison:… [Read More]
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