When the digital system first appeared KM made a very strong point that this lens wouldn't work with the digital system. I've not heard otherwise until now and the price - once generally well over $1500 used - has been depressed because of that. It's not a very useful lens as the working distance is far too close; I remember it was made for a specific technical use (probably not copying stamps or coins). I had one to test for a short period and it was very limiting if impressive.
From the Maxxum 7D manual, Page 117: " Lens Compatibility. All Konika Minolta AF lenses are compatible with this camera. MD and MC series lenses cannot be used. For our current line of lenses, contact your Konika Minolta dealer.
The AF Macro Zoom 3X-1X f1.7-2.8 cannot be used with Anti-Shake (p. 32); turn Anti-Shake off. If a lens is equipped with a macro release, the release cannot be used with Anti-Shake. Focus range limiters set to a range that does not include infinity cannot be used. The focus ranger limiter on the SSM-series or D-series macro lenses can be used at any range. Anti-Shake may not work with products made by another manufacturer "
A900 or A99 manuals don't mention this lens anymore.