Originally posted by ivanvernon Actually, I find that the greater mass of the medium format camera and lenses tends to dampen camera shake and instability, especially when combined with faster shutter speeds.
I get this quite often when testing really big lenses, e.g. the Pentacon 4/300 I got recently - you can hand-hold them at shutter speeds where a lighter lens would be a lot less forgiving. There's so much inertia that they don't shake much.
Today's arrival was another job lot, just three lenses this time in PK mount.
Pentax FA 28-70mm working but some fungus in the rear element, bad enough to affect images
Sigma manual focus 100-200mm working but very slight fungus, probably isn't causing problems
And the lens I bought the lot for, Sigma 28mm 2.8 mini wide, manual focus working and clean inside and out, and has the electrical contacts that let it meter on digital bodies. Paid £16 for the lot, I should get more than that for the 28mm alone.
Nothing else on the horizon at the moment.