FMA180 | ||
Aperture | 40mm | |
Focal length | 220mm (objective lens) | |
Focal ratio | F5.5 (objective lens) | |
Objective type | Triplet dual ED air-spaced APO (objective lens) | |
Overall length | 145mm ( Photographic mode with focal reducer) | |
Total Weight (Including tube ring&dovetail plate) | 395g | |
Rear-end adapter type | M42x0.75 (photographic mode) | |
Package information | FMA180 6-elements lens body, a pair of tube rings, a finder bracket, two extension tube, 1.25" adapter, an Allen wrench, a manual |
FMA180 pro Parameters | ||
Aperture size | 40mm | |
Focal length | 180mm | |
Focal ratio | f/4.5 | |
Objective lens | sextuplet with two ED glasses air-spaced APO | |
Back focus | 55mm | |
Image circle | 44mm | |
Total length | 167.5mm | |
Total Weight (Including tube ring&dovetail plate) | 0.8kg | |
Rear-end thread type | M48×0.75 (built-in 2" filter thread) | |
Standard package items | an 180pro OTA, an instruction manual |