ASKAR FRA400C F/5.6 APO REFRACTOR SKYROVER-IP With this controller you can

With this controller you can keep the temperature in the tube or around the optics only a few degrees above the air temperature

Tripod weight

so this is strictly a photographic filter and benefits from cameras with good IR response such as the QHY462C

The AFW has M54 x 0

Constructed from high-grade steel

ASKAR FRA400C F/5.6 APO REFRACTOR SKYROVER-IP With this controller you canThe Askar FRA 400C 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 400C features a Petzval design that does not