William Optics
Like New RedCat 51mm f/4.9 ver. 1
SKU: U2411-JJ-DM-L-RC51
See It In Person - On Display In Our Showroom!
Qualifies for Free Ground Economy Shipping (CONUS Only)
This is a version 1 RedCat 51 is in pristine, perfect condition. The optics are whistle-clean, and the body - including the dovetail - is unmarked.
It was traded in by a customer who has since moved on to a smart scope. The scope comes complete, as you see it in the photos, and comes in its original soft-sided foam-lined case.
We can ship this item to you.
Probably the very sharpest 250mm camera lens you will find!
- Newest version (including camera angle adjuster, 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
- Soft Carry Case