Both of these lenses are excellent, and can hold their own even today. Back in the 1970's Leitz had a liaison with Minolta and both of these lens designs were 'borrowed' by Leitz and re-modeled with the same optics, but using closer production tolerances, then given slightly different metal barrels. They are essentially the same as your lenses and very good.
The Minolta version could be used on the Minolta SRt models, but as these lenses were from the MD range, they came later than the SRt cameras, which were MC meter coupled.
If you can get hold of a 24/35 zoom lens you will have a superb outfit. That lens was not as common as the other two, but in the same range. All these three lenses were constant aperture throughout the range.
I was not aware that Minolta made a 28/105 in manual focus. The other one was probably a 35/105 The 28/85 and 35/105 were not constant aperture and are rarely seen today. (in UK) They can be found in the AF mode quite readily, they have same optical design, but with AF mounts. The 28/85 was a very good lens, better than the 35/105
These other two lenses were not adopted by Leitz, perhaps they thought the range they covered was a bit to advanced for them, or more likely the quality wasn't there. The Minolta XE1/XE7 camera design was also 'borrowed' by Leitz and turned into the R3 model with spot metering and a stronger die cast body. The XD7 you mention has more than a passing resemblance to the Leica R4, but I feel this is just by way of coincidence. than design.
Last edited by BMbikerider; 02-09-2013 at 05:00 PM. Click to view previous post history.