Resolution charts imho are pretty much a waste of time. The best thing to do is load it up with whatever film is your fav and shoot a roll. Then make some prints at various sizes.
The SP is a great little camera, here is a write up from Cameraquest:
"Produced from 1969 to about 1976, the Olympus 35 SP has the distinction of being the only 35 Rangefinder with a dual metering system: spot or centerweighted readings. This is amazing since the camera is over 30 years old and to date no other RF has equaled the 35 SP's dual metering. Yes indeed, it was far ahead of its time. If you don't count the Leica M5 and CL with their large spot meters, the 35 SP is also the only 35 rangefinder with spot metering! Besides that, the 35 SP was the 1st camera with AE exposure AND spot metering!
The sophisticated and sharp 7 element five group 42/1.7 Zuiko lens offers proof of the quality built into the Olympus 35 SP. A simpler less expensive 5 or 6 element lens would have sufficed, yet Olympus choose to go the more expensive route and use the best lens possible for its price range.
The SP offers programmed automatic exposure non interchangeable lens rangefinder with manual over-ride. The lens focuses down to 2.8 ft with a f/16 minimum f/stop and a 49mm filter size. It measures 5 1/8" long x 3 3/16 high x 2 7/16" deep counting the lens and weighs in at 22 oz. Black SP's are quite rare, almost all are chrome."
