My husband has a Nikon F65 NON-digital camera for which he has an APO sigma 170-500mm lens. I am thinking of purchasing a digital camera for him (Nikon D50). Will this sigma lens be compatible? Are lenses digital or non-digital?
Cameras - Sigma - APO 170-500mm f/5-6.3 DG for Minolta Digital
Answers & Comments
Yes, the lens will be compatible with the D50.
All lenses are optical: light comes in one end and goes out the other. There's no digital/non-digital about it.
What there is about lenses is the size of the image circle. Lenses cover a certain area. A lens that covers a 35mm film frame, such as the Sigma under discussion, will also cover a smaller area, such as the sensor on a D50. It's possible to design lenses with a smaller image circle. These smaller, lighter lenses are sometimes called "digital," because they are intended to only cover the typically smaller digital sensor. Using such a lens on a full-frame or film camera will produce dark corners. This is NOT an issue in your case.