Small, powerful and ready for your best photos
The William Optics AP 61/300 is built for photographers who want a compact tube with true premium image quality.You get a clear, tight and flat image across the entire frame.So you can work faster, focus easier and get sharper results instantly.

Flat image without loose accessories
Petzval design does all the hard work for you.Four lenses provide a flat and color-clear image, so you can no flattener Just plug in your camera, focus and go, providing peace of mind and consistent image quality night after night.
Focusing is smooth and precise
With the internal focuser, you gently rotate the image into focus without the camera wobbling.The tilt adapter helps you perfectly straighten your sensor.This keeps your image sharp to all angles, even with a full-frame camera.

Fits almost anywhere
The prism bar gives you three mounting options:Arca-Swiss, Vixen or regular tripod screw.So you snap the telescope onto a photo tripod as easily as a star tracker.Ideal for outdoor work and travel.
Smart design with everything included
The RedCat 61 comes with bag, rings, prism bar and Bahtinov mask.The mask is neatly hidden in the dew cap, so you always have it with you.You focus quickly and precisely, even in the dark.
For night, nature and everything in between
This telescope works great for nebulae, star fields and night pano.But it is also suitable for nature photography thanks to its short focal length and fast f/4.9 aperture.You get clear images with high detail, without long exposure times.
Specifications
Optics
| Feature | Description |
|---|---|
| Type | Refractor |
| Design | Apochromat |
| Aperture (mm) | 61 |
| Focal length (mm) | 300 |
| Focal Ratio (f/) | 4,9 |
| Resolution | 2,26″ |
| Limit value (mag) | 12,3 |
| Light output | 80 |
| Max. useful magnification | 122× |
| Tube weight (kg) | 3,4 |
| Tube length (mm) | 365 |
| Tube material | Aluminum |
| Coating | Multiple |
| Tube construction | Full tube |
| Dew cap diameter (mm) | 80 |
| Lens Design | Quadruplet |
Focuser
| Feature | Description |
|---|---|
| Tilt adapter | Yes |
| Design | Internal |
| Camera connection | M48 |
| Backfocus (mm) | 57 |
| Free opening (mm) | 45 |
| Rotatable | Yes |
Mount
| Feature | Description |
|---|---|
| Design | OTA |
| Type of mount | Without |
Included accessories
| Section | Description |
|---|---|
| Dew cap | Yes |
| Transport bag | Yes |
| Bahtinov mask | Yes |
| Dovetail | Arca-Swiss & Vixen-Style |
| Tripod screw | Yes |
| Corrector | Integrated |
General
| Feature | Description |
|---|---|
| Series | Cat |
| Color | Red |
| Observation goals | Astrophotography, Moon & Planets, Nature, Deep-sky |
| Sun | No (only with appropriate filters) |
| Recommended for | Advanced |
| Observatory use | No |





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