Combination of 90FL tele lens and 0.72x reducer for ultimate optical resolution from corner to corner. Unexceptional optical resolution is achieved by adopting fluorite glass element from Canon Optron in the optical design of the objective lens. Focal length of 360mm and F4 aperture makes this lens fast and sharp, ideal for shooting nebulas and star clusters. The lightweight construction that weighs only 2.5 kg and can be mounted on a portable equatorial mount. The objective lens, carbon barrel and helicoid can be separated, making this lens ideal for travel and expeditions. Linear helicoid is equipped with a scale and a stopper to ensure good response when focusing.
Highlight features
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Combination with 0.72x reducer for shortening of the shutter speed.
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Fluorite glass element from Canon Optron in the optical design.
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Objective lens optical design: 6 elements in 5 groups, fluorite apochromatic, multicoated.
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Full-frame camera compatible.
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Only 2.5 kg, including a set of accessories.
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Arca Swiss compatible plate included.
Specifications
| Model Name | BORG 90FL+Reducer 7872 SET |
|---|---|
| Product Code | 6572 |
| Focal Length, mm | 360 |
| Aperture | f/4 |
| Min. Length, mm | 389 |
| Weight, g | 2500 |
| Filter Size, mm | 82 |
| Minimum Focusing Distance, m | 4 |