William Optics RedCat 51 III WIFD f/4.9
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Vai al moduloWilliam Optics RedCat 51 III with Internal WIFD Focuser – Petzval Telescope for Full Frame Astrophotography
The RedCat 51 III WIFD by William Optics represents the latest evolution of the iconic compact telescope for astrophotography. Featuring the revolutionary WIFD (William Optics Internal Focus Design), it ensures ultra-precise internal focusing with zero image shift or tube flex, even with heavy cameras or motorized accessories.
The 4-element Petzval optical design using FPL-53 glass delivers a flat, sharp image field across full frame sensors. With a 250 mm focal length and a bright f/4.9 focal ratio, it is the ideal choice for wide-field astrophotography of nebulae, galaxies, and the Milky Way.
Supporting Full Frame, APS-C, and Micro 4/3 sensors, the RedCat 51 III includes a built-in 2" M48 filter thread, a camera rotator with lock, a tilt adapter, and a dual-speed focuser knob with 10:1 reduction and integrated thermometer. This makes it a complete solution for both traveling astrophotographers and professionals.
Technical Specifications
- Optical Design: Petzval with 4 elements (FPL-53)
- Aperture: 51 mm
- Focal Length: 250 mm
- Focal Ratio: f/4.9
- Image Circle: 48 mm (Full Frame coverage)
- Focuser: Internal WIFD, 0–23 mm travel, ZWO EAF compatible
- Camera Rotator: Integrated with scale and lock screw
- Tilt Adapter: Included
- Threaded Ports: M54 x 0.75 + M48 adapter
- Internal Filter: 2" M48 thread
- Telescope Length: 298–346 mm (with or without extended dew shield)
- OTA Weight: 1.77 kg (tube only); 2.38 kg with rings and Vixen plate
- Carrying Case: Included, soft case, 39×25×27 cm
Component Overview
The RedCat 51 III comes fully equipped with essential components for a seamless astrophotography setup:
- Rear Dust Cap: M48 threaded
- Carry Handle with Vixen Dovetail: for quick mount attachment
- Retractable Dew Shield: with integrated Bahtinov mask
- Internal WIFD Focuser: with built-in thermometer
- Vixen Dovetail Plate (210 mm): standard fit
- Camera Rotator: graduated scale and locking screw
- Removable M48 Adapter: with internal filter holder
- M4 Mounting Holes: for accessories or finder scopes
Designed for mobile setups and astrophotographers on the go, the RedCat 51 III offers high-end optics and refined mechanics—ready for any deep sky imaging session.