|✔ Staff Pick|
Available to Order, usually 7-10 days to ship.
CONDITION: Lightly used, scratches on the rear rotator ring (see photo). Optics look brand new. Includes William Optics erect prism 90-degree diagonal for visual use with standard 1.25" eyepieces.
Probably the very sharpest 250mm camera lens you will find!
- 51mm Doublet ED APO f/4.9 (250mm fl)
- FPL53 & FPL51 glass
- 3.2 lbs tube weight.
- 44mm imaging circle with a flat field edge to edge for full-frame sensors
- Dual Vixen and Arca Swiss Dovetail
- M48 thread to accept wide t-rings/t-mounts
The best value, highest quality 250mm lens you will find for your camera.
51 mm lens, in a sleek Petzval design, using Synthetic Fluoride (FPL53 and FPL51) glass for a full-frame flat field image. The optical quality provides exceptional performance at a fast focal ratio of f/4.9.
Filter Adapter allows use of 48mm filters. Focusing is made easy with a bahtinov mask integrated into the lens cap.
|Aperture||51 mm (2")|
|Camera/Eyepiece Connection||Male M48x0.75|
|Dawes Limit||0.46 arcseconds|
|Focal Length||250 mm|
|Glass Type||FPL-53 and FPL-51|
|Highest Useful Magnification||102x|
|Light Gathering Power||53x|
|Tube Weight||3.2 lbs|
- RedCat 51mm Telescope
- Bahtinov Mask
- 210mm Dovetail
- Mount Ring
- Soft Carry Case