ASKAR FRA400 F/5.6 APO REFRACTOR Nadirus 16" smartphone etc

smartphone etc

Circular base plate

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

It has a thickness of 0

ASKAR FRA400 F/5.6 APO REFRACTOR Nadirus 16" smartphone etcThe 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