Great pix. And I agree on the exposure strategy and lenses. My oldest Pentax 50 is f/2 but I have 135, 35, a Spiratone 500 mm mirror tele (T mount) , Swift 1000 mm f/13.3 telescope (3" refractor) with machined stuff to accept T mounts, some M42 threaded lenses originally bought for my Miranda (which had its own mount but M42 threads inside as well).
Great pix. And I agree on the exposure strategy and lenses. My oldest Pentax 50 is f/2 but I have 135, 35, a Spiratone 500 mm mirror tele (T mount) , Swift 1000 mm f/13.3 telescope (3" refractor) with machined stuff to accept T mounts, some M42 threaded lenses originally bought for my Miranda (which had its own mount but M42 threads inside as well).