Light as a cat, sharp as its eyes.

Highlights

Precision Petzval Optics

Innovative Petzval optics in the William Optics Redcat series provide sharp, high-contrast images with minimal chromatic aberration.

Ultra-Portable Design

Redcat series offers ultra-portable solutions for astrophotography with compact, lightweight designs for easy transportation and setup.

Effortless Camera Integration

The Petzval design of the Redcat series simplifies astrophotography by eliminating backfocus adjustments, ensuring cameras can be easily attached for a user-friendly experience.

Petzval
APO Design

Extra-low Dispersion (ED) glasses

Deliver sharp, vibrant images with true-to-life colors, significantly reducing chromatic aberration.

Needs NO Flattener

The Petzval design inherently flattens the field, eliminating the need for an external field flattener.

High-precision polishing

Our lenses undergo high-precision polishing, setting a standard of excellence that surpasses industry norms, ensuring optimal performance in all conditions.

MiniCat 51

UltraFast Petzval

6-element Petzval design with two Super ED elements, delivering double the efficiency of traditional Cat telescopes. The 14-degree field of view is ideal for wide-field deep-sky imaging, reducing the need for mosaicking and maximizing shooting flexibility.

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Sharp And Quick Aperture

MiniCat	Cat 51
f/3.5	f/4.9
Cat 61	Cat 71
f/4.9	f/4.9

WIFD Focuser

The William Optics Internal Focus Design (WIFD) places the focusing mechanism at the center of the telescope to achieve optimal structural balance, which directly leads to the following benefits:

Eliminates Tube Tilt
By centering the focusing system, WIFD eliminates tube tilt caused by the weight of cameras and accessories.
Unobstructed Optical Path
Without a traditional rear drawtube, WIFD prevents optical path obstruction and maintains consistent light throughput.
Cleaner, Low-Maintenance Focusing System
The sealed internal focusing mechanism minimizes dust exposure, making the system easier to maintain and reliable over long-term use.

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Compatible with Electronic Motorized Devices

Hassle Free Installation
( No Mounting Bracket Kit required )

Fast and accurate focusing

Integrated Bahtinov mask in dew shield cap (Patent number: US 10,564,409 B2) ensures precise focusing. Made of high-definition and stable optical PMMA. Enhances astrophotography experience with quick and accurate adjustments.

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Just For Astrophotography