William Optics - Redcat 51 F/4.9 Petzval Refracting Telescope

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  • The William Optics RedCat 51 is a 51mm Petzval quadruplet APO refractor with synthetic Fluorite optical glass.

  • Modeled after telephoto camera lenses and inspired by luxury watches, William Optics' goal was to create an affordable telescope that would provide superior performance, ultra flat field and perfect color and contrast.

  • Easy to adjust helical style focuser and camera rotator with etching for accurate adjustments.

  • Fast optical design at f/4.9, 250mm focal length.

  • Beautiful red anodized finish.

  • Includes soft carry case, M48 camera adapter, V series dovetail foot, and a removeable dew shield with Bahtinov mask cap.

SKU: WIL-A-CAT51-R
Manufactured by:
William Optics
 

Product Description

William Optics Redcat 51 F/4.9 Petzval Refracting Telescope

The William Optics Redcat features a 51mm objective lens, in a sleek quadruplet Petzval APO design, using Synthetic Fluoride (FPL53 and FPL51) glass for a full frame flat field image. The optical quality provides a fast focal ratio of f/4.9, 250mm focal length. The RedCat 51 will out resolve most high resolution DSLR lenses of similar focal lengths with exceptional color and contrast. 

Inspired by luxury watches, the field rotator is laser etched with a degree indicator. Focusing is similar to a telephoto camera lens with a smooth helical style focuser for fast and accurate focusing.  To ensure that you will have the most precise framing possible in a small portable system, the camera can be rotated to with accuracy.  Included with the RedCat 51 is a convenient soft carry case, removeable dew shield, M48 camera adapter, and William Optics patented Bahtinov mask cap.   The William Optics RedCat is ideally suited to nightsky astrophotography, wide field astroimaging, and wildlife photography. 

Why Synthetic Fluorite Glass?

True Fluorite is a rare mineral which create very expensive optical lenses.  Being a natural material, consistency and impurities are additional factors which further increases cost as does the cost of mining and the impact on our environment.  Synethic fluorite is a highly stable monocrystal completely free of impurities.  It does not emit fluoresence in UV light and is an extrodinarily clear lens material.  Great care is taken during manufacturing for grinding and polishing this material to ensure that the lens does not chip or scar, and the result is a lens that is completely free of chromatic abberation making it ideal for astrophotography and wildlife imaging or viewing.

Specifications

Name William Optics - Redcat 51 F/4.9 Petzval Refracting Telescope
Manufacturer William Optics
Model WIL-A-CAT51-R
In The Box William Optics 51mm RedCat APO Telescope Dew Shield Bahtinov Mask Cap M48 Camera Adapter V Series Dovetail Foot Dust Cap
Aperture 51mm
Case Soft Case Included
Dew shield Removable with Built-in Bahtinov Mask
Focal Length 250mm
Focal Ratio f/4.9
Focuser Calibrated Helical
Lens Coatings Fully Multi-Coated
Optical Glass Synthetic Fluorite
Optical Design Petzval Quadruplet
T-Threads Includes M48 Camera Adapter

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In the Box

William Optics 51mm RedCat APO Telescope
Dew Shield
Bahtinov Mask Cap
M48 Camera Adapter
V Series Dovetail Foot
Dust Cap

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