Minolta lenses on A77

Ralf Bliesener wrote:

From my Maxum film days I have the Minolta 85/1.4G, and the Tokina AT-X 17/3.5, 28-80/2.8 and 80-200/2.8. I added the Minolta 50/1.7 and 50/1.4 vintage primes after I switched to digital A Mount. All work fine on the KM5D, a700, a900 and a55 - this verdict from own use.

We A Mounters are lucky in that most if not all native Minolta A mount lenses do not suffer from one problem that appeared when going digital: The bright reflective surface of the image sensor reflects a lot more light back towards the rear end of the lens than film used to do, and some lenses reflect that light back on the sensor, causing a bright spot in the middle of the image.

Anti-reflective coatings on the lens element facing the sensor is one of the specific design elements resulting for "digital" lenses. Going smaller to benefit from the APS-C crop sensor was another major move, as is the need to project the light more "straight" into the image corners: Some digital sensors react much more critical to light coming in at an angle than film used to do.

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Cheers,
Ralf
www.ralfralph.smugmug.com