ASKAR 151PHQ APO QUADRUPLET f/7 Avalon Optical thickness 37 mm Weight

Optical thickness 37 mm Weight

1" to M68 adapter #BA2458191

It can be used to adapt accessories with male M54 threads to accessories with M48 female threads

the ASIAIR MINI is able to support hundreds of equatorial mounts from more than 20 manufacturers worldwide

ASKAR 151PHQ APO QUADRUPLET f/7 Avalon Optical thickness 37 mm WeightThe 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.