ASKAR SQA60 PRO f/4.6 APO REFRACTOR AM5 crisp images all the way

crisp images all the way to the edge of the field of view

The typical situation is imaging a faint

although the results are significantly cleaner than with traditional solutions

568mm focal length and 42mm image circle

the other one contains the counterweights and shaft

ASKAR SQA60 PRO f/4.6 APO REFRACTOR AM5 crisp images all the wayThe Askar SQA60 Pro is an apochromatic sextuplet flat field astrograph that offers high performance thanks to its air spaced lens design with 2 SD elements. Being a Petzval, the SQA60 Pro does not require the camera to be at a specific backfocus distance. With a 44mm full frame image circle, central star size RMS radius of less than 1m and less than 2. 4m at 22mm off axis, plus full field illumination of over 95% at the edge of the field, the SQA60