Brand and Model: | Surplus Shed Erfle 47mm |
Price ($USD): | 39.50 |
Type: | Erfle |
Focal Length: | 47 mm |
Barrel Size: | 2 |
Apparent FOV: | 45.0 degrees |
Field Stop Dia.: | 35.0 mm |
Eye Relief: | 20 mm |
Elements: | 5 |
Weight (lbs): | 0.75 |
Description: | Surplus Shed Description: This is the second in our 2 inch 5 element erfle design series. We used surplus optics to build these. Some elements originally cost our government hundreds of dollars each. Fits standard 2 inch telescope focuser. Coated optics. 60 degree field of view, 20mm eye relief, and 35mm clear exit aperture. Super eyepiece for the price. Unused. |