Alcor-System has optically designed, developed and manufactured a 4’’ field corrector for Newtonian telescopes (or for parabolic mirrors). It uses special glass to get the best performance for 300 mm to 700 mm diameter telescope with low f rations (down to f/2.8). This corrector can offer a 36×36 mm corrected field to near diffraction limit. This is a good choice for camera with BSI Sony IMX sensor such as IMX455, IMX461 and IMX411.
You can learn more about Alcor-System’s 4’’ field corrector for Newtonian telescopes here.
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