RedCat 71 with internal focuser: compact power for full-frame
The William Optics RedCat 71 WIFD combines the proven 71/350 Petzval optics with the internal WIFD focuser. You get a bright, sharp, and color-pure image for astrophotography and nature photography, with a balance that remains stable because nothing moves outside the tube.
Fast, tight, and without sagging
With f/4.9, the lens captures a lot of light: shorter exposures, less noise, and more detail. The image remains flat all the way to the corners of a full-frame sensor, without a separate flattener. The WIFD focuser tolerates heavy camera setups without shifting, and the Bahtinov mask in the lens hood allows for precise focusing.
In the box
- Optical tube RedCat 71/350 with WIFD focuser
- Integrated Bahtinov mask in the lens hood
- Arca-Swiss and Vixen-Style dovetail
- Nylon tote bag
Featured accessories
A William Optics UniGuide 32mm Guidescope (159 euros) completes the setup for long exposures. William Optics' M48 camera adapters are available for common mounts; choose the variant for your camera.
For whom yes, for whom no
For: Astrophotographers who want the RedCat 71 optics with the latest internal focuser, also as a travel and nature lens. Not for: Those who want to observe visually with eyepieces; the ZenithStar line is the logical choice for that.
Specifications
| Optical design | Apochromat, Petzval |
| Opening | 71 mm |
| Focal length | 350 mm |
| Opening ratio | f/4,9 |
| Focuser | WIFD (intern) |
| Field of view | Flat to full-frame |
| Focus assist | Integrated Bahtinov mask |
| Attachment | Arca-Swiss and Vixen-Style |
| Execution | OTA (loose tube) |
Unsure about the right tube for your camera and mount? The telescope selection aid helps you choose. Also view all Refracting telescopes and the full range of William Optics.
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