GIOTTO 185 SMART FLAT FIELD GENERATOR UHC 75 (T2) female threads to

75 (T2) female threads to a 1

85x reduction factor will convert the focal ratio of your Evostar 72ED from f/5

4 mm Focal length 1370 mm Focal ratio f/9 Linear obstruction 76 mm Corrected field 32 mm Backfocus distance 159 mm with standard focuser

at the same time

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GIOTTO 185 SMART FLAT FIELD GENERATOR UHC 75 (T2) female threads toThe Prima Luce Lab GIOTTO 185 is an ASCOM and Wi Fi controllable flat field generator designed to provide consistent and repeatable flat calibration frames. The GIOTTO 185 can be used with telescopes with an aperture up to 185mm and an external tube diameter between 147 210mm with the included plastic thumbscrews. GIOTTO flat field generators feature an array of LED lights with a colour temperature similar to the Sun and a specially designed diffuser