William Optics
Used RedCat 51mm f/4.9
SKU: U2408-VD-L-RC51-BOX
See It In Person - On Display In Our Showroom!
Qualifies for Free Ground Economy Shipping (CONUS Only)
Condition: This is a used RedCat 51 in great condition. The optics are clean as well as the body except for some minor wear on the dovetail from regular use (shown in the pictures).
The scope comes in its original soft-sided foam-lined case but does not include a handlebar.
Description:
Probably the very sharpest 250mm camera lens you will find!
- Newest version (including camera angle adjuster, cat paw scope clamp, DSD dovetail bar, and focus tensioner)
- 51mm quadruplet ED APO f/4.9 (250mm fl)
- FPL53 & FPL51 glass
- 3.2 lbs tube weight.
- >43mm 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 |
| Focal Ratio | f/4.9 |
| Glass Type | FPL-53 and FPL-51 |
| Highest Useful Magnification | 102x |
| Light Gathering Power | 53x |
| Limiting Magnitude | 12.3 |
| Optical Design | Petzval |
| Tube Color | Red |
| Tube Diameter | 51mm |
| Tube Weight | 3.2 lbs |
| Dew Shield Outer Diameter (for soar filter sizing) | 80.5mm |
- RedCat 51mm Telescope
- Bahtinov Mask Cap
- 210mm Dovetail
- Upgraded Mount Ring (with cat paw logo)
- Soft Carry Case