Astromania Quality Bahtinov Mask Focusing Mask for Telescopes - FM270mm for A Tube Outer Diameter (OD) from 290mm-340mm - Can Be Mounted with The Brass Screws Inside or Outside The Drawtube
Product details
| Management number | 208574575 | Release Date | 2026/03/22 | List Price | US$12.40 | Model Number | 208574575 | ||
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- Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task; the best focus for your telescope quickly and easily
- Suitable for use on all types of telescope; they are made from precision laser cut enforced plexiglass that is stiff and long lasting; they will never be brittle in the cold; unlike some other masks which are made from normal plastics
- The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect valued telescope surface; mask remains centered since 3-post mounting; while fitting a wider range of telescopes
- Made from 2mm thick laser cut plexiglass and securing screws are capped with soft plastic so that do not damage telescope; They have adjustment latitude of about 290-340mm that adjustable to fit optical tubes unlike masks which only fit one telescope
- Please be assured these focusing masks will work excellently for both reflectors and refractors with whatever focal length; all you need to do is to measure telescope tube size and choose right size of mask contact us if not sure where to measure
| Department | Unisex |
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| Item Weight | 5.4 ounces |
| Manufacturer | Astromania |
| Item model number | SKU_AM_BFM270 |
| Product Dimensions | 5.12 x 5.12 x 0.12 inches |
| Is Discontinued By Manufacturer | No |
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