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Specifications below
     
Optical configuration = 7 elements in 6 groups
Angle of view = 24° full frame, 16° APS-C.
Aperture = 9 blades, circular.
Full frame and APS-C = Yes, made for full frame.   APS-C equivalent, 150mm
Depth of field and focus scales? = Yes and yes
Minimum focus, image plane to subject = 40.5"  (1029mm)
Minimum focus, end of lens barrel to subject = 35"  (889mm)
Hard stop at infinity focus? = Yes, but off slightly
Length changes when focusing? = Yes
Focus ring turns in AF? = Yes
Filter size = 55mm
Filter ring rotates? = No
Distance encoder? = No
Max magnification = 0.13x
Min. F/stop = F/32
Sony teleconverter compatible? = No
Dimensions W x L (my measurements) = 2.65" x 2.95"   68mm x 75mm
Maximum  extended length (my measurements) = 3.6"  (91mm)                                                    
Weight bare (my scale) = 16.7oz  (473g)  17.4oz (494g) with caps


The Minolta AF 100mm F/2 is a compact lens, about the same size (but a little heavier) as the Sony 24-105mm F/3.5-4.5 lens.  Build quality is very good.  It has a gloss black finish with ribbed rubber inserts around most of the circumference.  It has a focus distance window with ft and m in different colors along with DOF hash marks.  It also has an infra-red focus index mark, the red dot on the aperture scale.  The lens is made in Japan, and dates to the late 1980s.  Filter size is 55mm.

This lens has a normal to long focus throw, and focuses a little slow, but mostly accurately using the A700 or A900.  There seems to be a bit of front-focus at long distances, and back-focus at short distances, but not noticeable past F/2.8.  There's a tiny bit of slop on the focus ring if you wiggle it by hand when engaged, and none in actual MF use.  Manually, the ring is pretty easy to manipulate with a finger and thumb.  Over a third of a turn gets you from close focus to infinity, with the overall length of the lens increasing and extra 16mm for focus extension.  The focus ring turns in auto-focus mode, but thankfully, not the filter ring.

My copy of this lens is pretty scratched up, so instead of spending days in photoshop re-doing the images pixel-by-pixel, I darkened them up to hide the damage.  Optically though, it's in great shape.

This lens has the typical  multi-coatings from the 1980s, and the color is predominately golden.  You'll see a lot of green/magenta blobs and/or arcs depending on angle and aperture.  The sun doesn't have to be in the image to cause heavy veiling glare, so be sure and block any intense light sources which can cause havoc with your pictures.  This lens came with a hood originally, but my sample is missing that part.  I tried a few modern Sony 55mm hoods, and found the best fit was the hood from the Sony 50mm F/1.4 lens.  I don't think is has the correct flanges, but it holds tight.  Also try the Sony 75-300mm F/4.5-5.6 hood.  It fits ok.

Filter size is 55mm.  This is also Sony's most popular size.

Filter use.  A regular filter causes no additional vignetting on a full frame, or APS-C camera.

Coma.  None on an APS-C camera, but full frame has a very small amount at F/2. See sample crops below.

Color looks the same as other Sony/Minolta lenses.

Close-up filter.  Works ok, with a little contrast loss.  A +2 or +4 would help out if you want a better close focus shot since this lens has a small reproduction ration of 0.13x.  See results here of a Minolta 28mm F/2.8 lens using a +4.

Bokeh looks somewhat busy when the background is close to the subject at medium distances.  Overall, I found (in most images) the background blur to be fairly smooth, and very similar to the Sony 100mm F/2.8 macro lens.  See crops below.

Axial color fringing is present, especially at F/2, (and typical of 1980s lens designs), but not very apparent unless you shoot bright white subjects flanked by dark areas--and--look at your images greatly enlarged on your computer screen.  I mostly came upon magenta and cyan, though magenta is usually more noticeable.  Stopping down gets rid of this type of CA.  

http://www.photographyrevi ew.com/mfr/konica-minolta/ 35mm-primes/PRD_83483_3111