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Old Jul 9, 2006, 2:04 PM   #1
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~One of my friends currently owns a Maxxum 450 si, and is considering buying a Minolta DSLR. He has two lenses and asked me to find out if they would work on a digital. So I turned to the experts. His two lenses are a Promaster 28-80 and aTamron Tele/Macro (1:3:9) 75-300 4-5.6 LD. I appreciate any information you can give me. I looked up both companies, and it seems they would work on a digital, but I'm not sure because of the mount differences.~


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Old Jul 9, 2006, 2:23 PM   #2
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Those two lens will indeed mount on either a KM 5D or a 7D. However if all of the auto functions will works is sometimes in doubt. Why not try them on somebody's KM camera and check it out.

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Old Jul 9, 2006, 2:44 PM   #3
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Any Autofocus lens designed for Minolta Maxxum or Dynax series cameras should work. From time to time, you see a problem with some older Sigma lenses reported. But, most others work fine.

I see several user reviews of that Tamron 75-300mm from KM DSLR owners, so it should work. It's an inexpensive zoom lens ($129.95 brand new at B&H or Adorama).

I haven't found anyone using that particular Promaster. Some of these lenses are made under a variety of brands (Promaster/Vivitar/Cosiina) and tend to be low end consumer lenses. But, surprisingly, I see very few problems reported with this lens brand on KM DSLR models.

I see one now on Ebay in new condition for $89.00. But, you could probably find a used one for around half that amount (or even less, depending on condition).

These lenses will appear to be longer on a DSLR, because a KM DSLR has a sensor that's smaller than 35mm film. So, the 28-80mm lens will behave like a 42-120mm lens on a KM DSLR from an angle of view perspective, comapred to a lens on a 35mm camera.

The 75-300mm lens would have the same angle of view (apparent magnification) as a 112-450mm lens would on a 35mm camera.

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