yet another lens compatability question

[Seeking~Zen]

Hey everyone, I'm now considering buying new glass as opposed to Minolta AF lenses due to availability (and price depending on rarity). The first lens I want is to replace my 18-55 kit lens. I'm considering the 16-70mm F3.5-4.5 Sony/Zeiss Vario-Sonnar lens and the Sigma OS 17-50mm ES DC F2.8 HSM lenses. If I'm not mistaken, these lenses are specifically made for use for cameras with APS-C sensors (or at least the Sigma states it is). What I'm wondering, is if I can ever afford to upgrade to a body with a CMOS(?), will these lenses still work?

thanks in advance
S~Z

[bono]

You are probably asking about compatible lenses for fullframe cameras like the A850 or A900.

The Sony/Zeiss 16-80 is a fullframe lens so it will work on either APS-C or fullframe. The Sigma is only compatible with APS-C so if you would use it on a fullframe camera it would only work with limitations (reduced image size).

I would also consider the Tamron 17-50, this is the most used lens in this range.

[inkista]

However, the Tamron 17-50 is also crop-body only.

The crop-body designations are:

Sony: DT
Sigma: DC
Tamron: Di II
Tokina DX

You see those in the lens name, it's only good on a crop body and cannot be "shared" with an A850 or A900.

[Seeking~Zen]

excellent, thanks so much folks.