Originally posted by jmatt4366 Sigma 70-300mm 1:4-5.6
SMC Pentax-A 1:2 50mm
FOCAL MC 1:4.5 80-200mm
FOCAL MC 1:2.8 28mm
RKN MC 1:3.5-4.5 F=35-70mm
Good haul! The A50/2 sells for about what you paid for the lot. I'm selling an Alpha (Sony-Minolta) version of the Sigma and I expect to get about that same amount. Yes, check the last 3 for Ricoh pins, especially if they have P or A(P) settings on their aperture rings. We can maybe tell you more about the lenses if you tell us the serial numbers.
Quote: QUATARAY 52mm SPOT
QUATARAY 52mm +1
QUATARAY 52mm +2
QUATARAY 52mm+4
The SPOT might be a center-graduated neutral-density or soft-edge filter, I'm not sure. The other three are a set of close-up adapters, fun to play with but don't expect high IQ around the image edges. If you have the DA18-55 kit.lens, they'll screw right into it. Try the +1 at 55mm for soft-ish portraits.
Quote: Minnolta 2800 AF
Vivitar 1800
As mentioned, those flashes could fry your camera if directly connected. You can buy SYK optical flash triggers for about US$5 each (shipped) and safely use such flashes on tripods, triggered by your onboard flash.
You have done well, grasshopper!