ASKAR 151PHQ APO QUADRUPLET f/7 Avalon The QHY CFW3 Large is

The QHY CFW3 Large is a motorized filter wheel designed for 7 filters with a size of 2" and 7 unmounted filters with a diameter of 50mm

1" to M68 adapter #BA2458191

Optical thickness 37 mm Weight

66x reduction factor transforms the FC-100DZ into a 530mm f/5

ASKAR 151PHQ APO QUADRUPLET f/7 Avalon The QHY CFW3 Large isThe Askar 151PHQ is a professional apochromatic flatfield Petzval quadruplet with a focal ratio of f 7 and a corrected field of 60mm in diameter, making it suitable for use with medium format cameras. The largest of the Askar refractors so far, the 151PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration. The central RMS radius is less than 2 microns, with sharp stars all the way to the edge of the field.