Nikon D7100 and 50mm 1.8 (lens seems separate, possible for f stop?) - http://www.blendswap.com/blends/view/77959
>pentax K1000 - http://www.blendswap.com/blends/view/80705
Samyang 85mm Lens (another possible one)- http://www.blendswap.com/blends/view/39095
Polaroid Camera (/film/?) - http://www.blendswap.com/blends/view/69850
Canon 24-70 - http://www.blendswap.com/blends/view/18440
Sony Nex 7 - http://www.blendswap.com/blends/view/54176
Kodak Instamatic 100 - http://www.blendswap.com/blends/view/26204

This site does appear to have download limits based on time but dunno if you'll run into it.

Canon Rebel t2i - https://www.cgtrader.com/free-3d-models/electronics/other/canon-eos-rebel-t2i
(actually doesn't seem to be blender file maybe)