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William Optics
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William Optics Ultra Cat 76 WIFD 76mm f/4.8 Apochromatic Refractor Telescope (OTA)
BH # WITC76BR MFR # T-C-76BR
Key Features
- 365mm Focal Length, f/4.8 Focal Ratio
- Five-Element Petzval Lens
- Center-Balanced Internal Focus Design
- For Full-Frame, APS-C, Micro 4/3 Cameras
William Optics Cat 51 WIFD 51mm f/4.9 Apochromatic Refractor Telescope (OTA Only, Red)
BH # WILRC51RDIII MFR # L-RC51RDIII
Key Features
- 250mm Focal Length, f/4.9 Focal Ratio
- Center-Balanced Internal Focus Design
- For Full-Frame, APS-C, Micro 4/3 Cameras
- 1x Coarse, 10x Fine Focusers
Available in other Styles, Configurations & Kits
William Optics Cat 51 WIFD 51mm f/4.9 Apochromatic Refractor Telescope (OTA Only, Space Gray)
BH # WILRC51SGIII MFR # L-RC51SGIII
Key Features
- 250mm Focal Length, f/4.9 Focal Ratio
- Center-Balanced Internal Focus Design
- For Full-Frame, APS-C, Micro 4/3 Cameras
- 1x Coarse, 10x Fine Focusers
Available in other Styles, Configurations & Kits
William Optics Cat 61 WIFD 61mm f/4.9 Apochromatic Refractor Telescope (Red, OTA Only)
BH # WITC61RD MFR # T-C-61RD
Key Features
- 300mm Focal Length, f/4.9 Focal Ratio
- Center-Balanced Internal Focus Design
- For Full-Frame, APS-C, Micro 4/3 Cameras
- 1x Coarse, 10x Fine Focusers
William Optics RedCat 91 WIFD 91mm f/4.9 Apochromatic Refractor Telescope (OTA Only)
BH # WITC91 MFR # T-C-91
Key Features
- For Full-Frame & Medium-Format Cameras
- 55mm Image Circle
- Petzval Design, No Flattener Needed
- 448m Focal Length, f/4.9 Focal Ratio
William Optics Cat 51 WIFD f/4.9 Apochromatic Telescope with ZWO AM5N Mount Kit
BH # WILRC51RDI5K
Key Features
- 250mm Focal Length, f/4.9 Focal Ratio
- Center-Balanced Internal Focus Design
- For Full-Frame, APS-C, Micro 4/3 Cameras
- Strain-Wave Motorized Mount
William Optics Cat 61 WIFD f/4.9 Apochromatic Telescope with ZWO AM5N Mount Kit
BH # WITC61RD5K
Key Features
- 300mm Focal Length, f/4.9 Focal Ratio
- Center-Balanced Internal Focus Design
- For Full-Frame, APS-C, Micro 4/3 Cameras
- Strain-Wave Motorized Mount