William Optics Cat 91 WIFD (T-C-91)
More on the Way !!!
While the product may not be available right now, have no fear! The next shipment is on its way to us! We expect to receive it really soon.
Reserve yours now !
More on the Way !!!
While the product may not be available right now, have no fear! The next shipment is on its way to us! We expect to receive it really soon.
Reserve yours now !
Step up your astrophotography game with the William Optics RedCat 91, an advanced apochromatic refractor tailored for full-frame and medium-format cameras. This latest addition to the RedCat series combines portability with superior optical performance, making it a versatile tool for capturing breathtaking detail in deep-sky objects.
Highlights:
The RedCat 91 blends the trusted RedCat heritage with William Optics’ innovative design, making it the ultimate choice for those ready to elevate their night-sky explorations.
An advanced apochromatic refractor tailored for full-frame and medium-format cameras. This latest addition to the RedCat series combines portability with superior optical performance, making it a versatile tool for capturing breathtaking detail in deep-sky objects.
Researched and developed by WO, the innovative 5-element Petzval design redefines telescope optics. This advanced system achieves a flawless spot diagram across a medium-format image circle.
Contains 2 Super ED, 1 ED glasses and lanthanum lenses with advanced fully multi-coated, delivering sharp, vibrant images with true-to-life colors, significantly reducing chromatic aberration.
The Petzval design inherently flattens the field, eliminating the need for an external field flattener.
Hassle Free Installation
( No Mounting Bracket Kit required )
The WIFD focusing Design relocates the focuser to the center of the telescope, addresses the issue of tube tilt caused by the weight of accessories and cameras
Lens Type : 5-Element Advanced Petzval
Lens Elements : Super ED Glass x2 ED Glass x1 Lanthanum Glass x1
Focal Length : 448 mm
Diameter : 91 mm
Focal Ratio : f/4.9
Image circle : 55 mm
Focuser : WIFD R&P Focuser Compatible with EAF
Focus : travel 0-36mm (Ruler to 40mm)
Adapter Included : Tilt Adjuster Rotator M63 → M54 Adapter M63 → M48 Adapter
Optional Flattener : No Flattener Required
T-Mount Supported : Canon EF, RF Nikon F, Z Sony E Pentax K MFT (M4/3) FUJI X
Camera Format : Medium Format ( needs additional adapter ) Full Frame APS-C M4/3
Tube Length : 556 mm
OTA Weight : 4.72 kg / 10.41 lbs
Total Weight : 6.3 kg / 13.89 lbs
-William Optics Cat 91 WIFD
-Bahtinov Cap
-M48 & M54 Adapter
-Mounting Plate
-Mounting Ring Handle Bar
-Soft Carry Case
-Allen Key Set