Ultra-Cat 76 f/4.8
William Optics
From ~$1,997.49
4 stores
The Ultra-Cat 76 is a high-performance 76mm apochromatic refractor, designed for astrophotographers who demand exceptional clarity and true color accuracy. With a 5-element advanced Petzval optical design, including super ED and lanthanum glass, and a fast f/4.8 focal ratio, this telescope delivers stunningly sharp, flat-field images across its 50mm image circle. The advanced 5-element Petzval optics eliminates field curvature, ensuring sharp, edge-to-edge stars without additional flatteners, and fully supports Full Frame cameras, APS-C and M4/3 sensors for optimal performance. The patented WIFD (William's Internal Focuser Design) ensures precise, stable, and hassle-free imaging, avoiding balance issues and eliminating vignetting.
Astronomy Plus
WIFD Ultra-Cat 76 f/4.8 APO (T-C-76)
Worldwide shipping
CA$2,719.00
~$1,997.49
Agena Astro
William Optics Ultra-Cat 76 f/4.8 WIFD Petzval Refractor Telescope w/ Free 32mm Guidescope
Worldwide shipping
$2,198.00
High Point Scientific
WIFD Ultra-Cat 76 APO Refractor
Ships to US only
$2,198.00
Astroshop.eu
Apochromatic refractor AP 76/365 UltraCat 76 WIFD
Worldwide shipping
€2,290.00
~$2,718.52
Specifications
| Tube Length Range | 363 mm |
| Focal length | 365 mm |
| Focuser Type | WIFD Rack-and-Pinion (EAF Compatible) |
| Optical design | 5-element Advanced Petzval |
| Total Weight | 4.98 kg |
| Aperture | 76 mm |
| Glass Elements | 2x Super ED, 1x ED, 1x Lanthanum, 1x X-element |
| Image Circle | 50 mm |
| OTA Weight | 3.81 lb |
| Sensor Tilt Corrector | ✓ |
| Focal ratio | f/4.8 |
| Focus Travel | 20 mm |
| Field Flattener Required | false |