Test image NGC 253
Takahashi Mewlon 250 at f10 with new CR reducer/flattener.
Camera SBIG ST83000 mono - Losmandy G-11 mount
Off axis guiding using Skywatcher ED100 at f9 and ST2000XCM

Image is stack of 3 x 10min exposures - resolution is 0.44 arc sec pixel - image is oversampled.
Sky conditions were less than satisfactory with hazy high altitude cloud.