ASKAR FRA400 F/5.6 APO REFRACTOR Nadirus 16" QHYCCD employs a unique thermal

QHYCCD employs a unique thermal noise control technology to reduce CMOS sensor noise to a very low value without affecting the integrity of the raw image

smartphone etc

Any source of flex appears like being “magnified” 20-fold

1390 mm (extended)

ASKAR FRA400 F/5.6 APO REFRACTOR Nadirus 16" QHYCCD employs a unique thermalThe Askar FRA 400 f 5. 6 is a professional apochromatic Petzval quintuplet with an aperture of 72mm and a corrected field of 44mm in diameter. The lenses are assembled in two groups: an air spaced triplet on the front and a correcting doublet towards the focus. The objective lens includes two Extra Low Dispersion glass for a superb chromatic correction. Differently from standard ED refractors, the Askar 400 features a Petzval design that does not