Alstar Bahtinov Mask Focusing Mask for Telescopes - FM80mm for a Tube Outer Diameter (OD) from 85mm-120mm
Product details
| Management number | 234220248 | Release Date | 2026/06/27 | List Price | US$5.60 | Model Number | 234220248 | ||
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- Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length; All you need to do is to measure your telescope tube size and choose the right size of the mask
- They are made from 2 mm thick laser cut abs; Securing screws are capped with soft plastic so they do not damage your telescope; These Bahtinov masks are adjustable to fit a wide range of optical tubes; They have adjustment latitude of about 85 to 120 mm
- The masks grip the telescope tube gently but firmly with three metal posts which have non scratching silicon sleeves; protect you valued telescope surface; Prevents slippage; Allow the mask to remaining perfectly central because of this 3 post mounting
- Suitable for use on all types of telescope; They are made from precision laser cut enforced plexiglass which is stiff and long lasting; They will never be brittle in the cold unlike some other masks which are made of normal plastics
- 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
| ASIN | B077FXTQW3 |
|---|---|
| Brand | A ALSTAR |
| Mount | Altazimuth Mount |
| Focus Type | Manual Focus |
| Unit Count | 1.0 Count |
| Finderscope | Reflex |
| Item Weight | 0.6 Ounces |
| Manufacturer | Alstar |
| Model Number | SKU_AM_BFM80A |
| Power Source | Manual Operation |
| BuiltIn Media | Bahtinov Mask |
| Field Of View | 0.43 Degrees |
| Compatible Devices | CCD cameras, DSLRs, Webcams |
| Additional Features | Bahtinov focusing system |
| Warranty Description | 2 Year Manufacturer |
| Objective Lens Diameter | 80 Millimeters |
| Focal Length Description | 85 to 120 millimeters |
| Manufacturer Part Number | 6971336220957 |
| Item Dimensions D x W x H | 0.1"D x 5.1"W x 5.1"H |
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