ZWO FF80 APO - 80 mm f/7.5 APO Quadruplet Refractor - FF80 - On Sale! Tripod Extensions About the Baader Astro Conversion

About the Baader Astro Conversion Filter for Canon DSLRs - EOS 400XTi/400D/40D/450D

49 arc seconds Light Gathering Power (Compared to human eye) 1127x Secondary Mirror Obstruction 3

Focal Length: 28mm

including smartphones

ZWO FF80 APO - 80 mm f/7.5 APO Quadruplet Refractor - FF80 - On Sale! Tripod Extensions About the Baader Astro ConversionThe ZWO FF80 APO is a f 7. 5 APO refractor with a flat field optical design there is no need to add a field flattener to this system! It is a pleasure to work with a system that does not require a separate field flattener; it eliminates the hassle of calculating the back focus distance and figuring out which spacers you require to achieve that distance for best focus. Just add any accessories you need, focus carefully, and start shooting! The FF80 has