ASKAR 80PHQ APO QUADRUPLET f/7.5 OSC filter the Flat68III should be set

the Flat68III should be set to 5mm for the Fluorostar 91

25" adapter is useful for connecting 1

The product photos of the Esatto bundles show the previous design of the RC10 which did not feature a tilt plate

245 g each

ASKAR 80PHQ APO QUADRUPLET f/7.5 OSC filter the Flat68III should be setThe Askar 80PHQ is a professional apochromatic flatfield Petzval quadruplet with a focal ratio of f 7. 5 and a corrected field of 44mm in diameter. The Askar 80PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration. Differently from standard ED refractors, the Askar 80PHQ features a Petzval design that does not require to set the sensor to a specific distance to the last lens. That leaves the freedom to use