Askar FRA400C Quintuplet Petzval Flat-Field Astrograph (FRA400C) Solar For tough technical requirements and

For tough technical requirements and safety considerations

making the manufacturing process very environmentally friendly

This is a camera with a small pixel size of 3

Its FWHM is 20nm which is suitable for most IR sensitive colour or mono cameras

Askar FRA400C Quintuplet Petzval Flat-Field Astrograph (FRA400C) Solar For tough technical requirements andThe refreshed, budget friendly iteration of FRA400, is suitable for astrophotography, daily photography, and visual observation. Key FRA400C Features Quintuplet ED Refractor: The FRA400C features a 72mm aperture, 400mm focal length, and a focal ratio of 5. 6. It adopts a quintuplet lens design with two ED glasses, supporting a 44mm full frame image circle. Self Flattened Design: The optical structure of FR4A400C is the same as that of the FRA400,