20 February 2010

Using MD lenses on an AF camera with an MD/MA adapter

Lichen stumps macro

Tamron SP 90mm macro on A100 with MD/MA adapter

River Loddon 2

Minolta MD Rokkor-X 45mm f/2 on A100

Some example pictures taken using a generic (unbranded MD/MA) adapter bought on eBay. Manual focusing is harder in the Sony viewfinder, and A100 shutter lock settings have to be switched off. Metering is done in A (aperture priority) mode, though there is a tendency to underexpose compared to similar AF lenses.

MD/MA adapter < The adapter

Cameras | 50mm AF f/1.7 prime | #1Cameras | 50mm MD f/1.7 prime | #2

^ These two pictures compare a Minolta 50mm f/1.7 AF (left) and MD equivalent (right). The cropping effect is visible as is a drop in contrast. Metered exposure with the MD lens was lower than that with the AF lens, and had to be compensated for.

When you have similar lenses for both mounts it seems hardly worth it with the MD/MA adapter. But the 90mm macro does a good job in the absence of an AF alternative (though I would be better off with a glassless Adaptall2 > AF adapter).


Tamron SP 90mm macro on A100 with MD/MA adapter

Future tests will look at Rokkor 135 and 200 mm telephoto primes.


1 Comment »

  1. you can give a try to a glassless adapter – nice macro range with all old Minolta lens at minimal cost and no degradation

    Comment by ian green — 27 February 2010 @ 1:29 am

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