Brand and Model: | Williams optics SWAN 40mm |
Price ($USD): | 120$ |
Type: | Misc Wide Angle |
Focal Length: | 40 mm |
Barrel Size: | 2 |
Apparent FOV: | 72.0 degrees |
Field Stop Dia.: | 0.0 mm |
Eye Relief: | 28 mm |
Elements: | 5 |
Weight (lbs): | 1.25 |
Description: | The Swan eyepieces are super wide angle designs with 72° apparent field of view. They use simple but sophisticated five-lens optical systems for generally higher contrast than the more complicated optical designs used in some other super wide angle eyepieces that use up to eight lenses. |