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| Management number | 213449963 | Release Date | 2026/04/12 | List Price | $36.00 | Model Number | 213449963 | ||
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The Cat 91 is a portable, medium-format telescope, boasting advanced apochromatic optics and a 5-element Petzval system, developed by William Optics. It comes with a Bahtinov Cap, camera adapter, and mounting components, ensuring sharp, vibrant images with minimal chromatic aberration. Compatible with various camera formats, it features a tilt adjuster and camera angle rotator for optimal performance.
| Brand | William Optics |
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| Focus Type | Rack and Pinion Focuser |
| Item Weight | 13.9 Pounds |
| Manufacturer | William Optics |
| Power Source | Manual Operation |
| Compatible Devices | Camera |
| Focal Length Description | 448 mm |
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