Hello, the best advice is to treat the lens like a new pair of hiking boots—you have to break your muscles in before they feel "custom fit." To speed that up, try to keep your left elbow tucked tight against your ribs so your torso carries the weight...
Hi, It may not have infinity focus. I would suggest to go to a site like B&H which sells several of the adapters and read the reviews. Pentax makes an adapter for Pentax cameras that work perfectly, but that's because the designed it to work with the...
