Mark 2.5 RedCat (2023) with upgraded angle tilt adjuster. This has now been replaced with the WIFD variant, so once these sell out, they are gone. We still consider this version to be a superior choice for a lightweight package with a camera tracker mount like the iOptron SkyGuider Pro or SkyWatcher GTI. (The WIFD variant is two pounds heavier, and better suited for use with a focus motor for a more automated setup.)
Accepts 55mm photo filters on the front, including 55mm thread on solar filters.
Probably the very?sharpest 250mm camera lens you will find!
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 |
James Wilson - 2024-03-03
Very satisfied with the purchase. The quality is top-notch and the delivery was speedy. Exceptional customer service too!