APC vs FF lenses

Started Mar 23, 2013 | Discussions thread
Bruce Oudekerk
Bruce Oudekerk Veteran Member • Posts: 3,285
Re: APC vs FF lenses

Clayton1985 wrote:

APS-C lenses will work on FF with the expected limitations.

Actually there can be some unexpected NON-limitations.

When an OEM lens is used, typically the FF camera (a850-a900, anyway) crops the image to APS-C …BUT…apparently some or all aftermarket APS-C lenses DO NOT auto crop unless it is set up that way in the menu sub-system.

For example my Sony 18-250 auto-crops no matter what but the similar Tamron 18-250 does not.  That initially irritated me when I first got my a850 but its just a fact of life now.  I presume the a99 is similar. When using these non-cropping aftermarket lenses vignetting might or might not occur at any given focal length.

What still irritates me is that the tiny APS-C crop marks on the viewfinder in the a850 and a900 are worthless to me as real world usable guides.  Again I don’t lknow how the a00 handles this but it should be able to magnify that APS-C image to fill the EVF.  ….should:)  I'd be interested to find out.


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Sony Alpha 7R II Samyang 14mm F2.8 IF ED MC Aspherical Sony E PZ 18-105mm F4 G OSS Sony Vario-Tessar T* FE 16-35mm F4 ZA OSS Sony FE 70-300mm F4.5-5.6 G OSS +1 more
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