Adaptall F mount on lens with F-EOS adapter works fine. Other mfr combinations likely to work also. I've got the venerable SP 90/2.5. The SP 17/3.5 is a very popular one as well ... as are other combinations. It is very doable.
No worries. I've used many older SP Adaptall-2 lenses on my EOS cameras, with infinity focus. I have a couple of A2 to EOS adapters; they work well but they're relatively expensive. In many cases, it's more cost effective to get an A2 to M42 and M42 to EOS adapter set. Not quite as solid as the A2 to EOS, but generally less expensive and quite satisfactory.
Here`s the manual focus SP lenses that I found were pretty excellent. The last one (35-80mm) is a real sleeper. You can often find one for about $75 on eBay and it`s darn nearly as good as the Contax Zeiss 35-70/3.4 (which is a significant feat).
I have been using the 17, 28-80, 35-80, 90 Macro, and 500mm reflex on all the EOS bodies, with no problems at infinity, with a standard Tamron to EOS adapter (Rainbow Imaging).
I've used two lenses a few years ago: 28/2.5 [02B] and SP 300/5.6 [54B]. I had an A2-OM mount + OM-EOS adapter and it worked just fine. The 02B was a nice, moderately sharp and compact lens but with very cold colour reproduction (giving a very "1980's postcards" look to the images), while the 54B was a good tele lens with a very usefull MFD, allowing some interesting close-ups.
SP 300/5.6,SP 90/2.5 (newer),SP 500/8 (newer),Tamron 28-80/3.5-4.2 with C/Y adaptall mounts+C/Y-EOS adapter.All good/very good with some caveats on 5D2/7D/600D.
