MiniCat 51 WIFD
William Optics
From ~$949.89
3 stores
The William Optics MiniCat 51 WIFD is an ultra-portable wide-field astrophotography refractor featuring a premium 6-element Petzval design with f/3.5 focal ratio that captures twice as much light as f/5 optics. Its innovative WIFD (William Optics Internal Focus Design) eliminates drawtube tilt while enabling direct compatibility with electronic autofocus systems like the ZWO EAF, making it ideal for modern imaging workflows. Weighing just 5.05 lbs with a 178mm focal length and 51mm aperture, this telescope delivers exceptional image quality across full-frame and APS-C sensors with its 43.2mm image circle, making it the premier choice for traveling astrophotographers pursuing deep-sky nebulae, extended objects, and time-sensitive targets like comets.
Astronomy Plus
MiniCat 51 f/3.5 WIFD (T-C-MINI-RD)
Worldwide shipping
CA$1,293.00
~$949.89
Agena Astro
William Optics MiniCat 51 WIFD f/3.5 Petzval Refractor Telescope - Red
Worldwide shipping
$988.00
Astroshop.eu
Apochromatic refractor AP 51/178 MiniCat WIFD OTA
Worldwide shipping
€999.00
~$1,185.94
Specifications
| Total Weight | 2.29 kg |
| ZWO EAF Compatible | ✓ |
| Optical design | 6-Element Petzval |
| Optical Tube Assembly Weight | 1.67 lb |
| Camera Format Compatibility | Full Frame (Compatible), APS-C (Recommended), M4/3 |
| Focal ratio | f/3.5 |
| Image Circle | 43.2 mm |
| Internal Focus Design | ✓ |
| Aperture | 51 mm |
| Focuser Type | WIFD Rack and Pinion |
| Tube Length | 210 mm |
| Focal length | 178 mm |
| Focus Travel | 0 mm |
| Flattener Required | false |
| Flange Distance | 58 mm |