Compact, powerful and instantly ready for crisp shots

The William Optics AP 51/250 RedCat is built for photographers who want clear, flat images without the hassle.The fast f/4.9 optic lets you make short exposures, so you get more good pictures in less time.Your image stays sharp all the way to the corners. Even if you're working with a full-frame camera.

Clear image thanks to Petzval design

The Petzval system with four-lens construction gives you a flat, color-clean image.You don't need a separate flattener, so your setup remains simple.The combination of FPL53 and FPL51 glass keeps stars round and tight, so you have less to correct in post-processing.

Internal focusing for smooth operation

You focus via the internal WIFD focuser.Nothing slides out, nothing tilts, and even a heavy camera remains stable.The focus ring turns precisely and feels direct.Want automatic focus? The RedCat just works with the ZWO EAF motor.

Ease of use for any setup

The M48 connector makes connecting your camera easy.The prism bar works with Arca-Swiss, Vixen and tripod screws.So you put the RedCat on almost any mount, photo tripod or portable tracker.

For night and nature

This small telescope picks up large nebulae, star fields and deep-sky objects with ease.During the day, it delivers equally tight images of animals and landscapes.So you get one compact telescope that can handle everything.

Smartly designed and ready to go

The aluminum tube feels solid.It is short, light and easy to transport.The Bahtinov mask is hidden in the dew cap, so you can always focus quickly and accurately.The included bag protects your telescope and keeps everything neatly together.

Specifications

Optics

Focuser

Mount

Included accessories

General