Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads
Product details
| Management number | 208571701 | Release Date | 2026/03/22 | List Price | $12.40 | Model Number | 208571701 | ||
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- Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter provide extra focuser back travel sometimes needed to achieve focus with certain eyepiece or telescope combinations. More back travel is often needed for short-range terrestrial viewing or with use of a field flattener, coma corrector, or focal reducer lens. Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope, or for astrophotographic applications.
- Extension tube provides extra focuser: back travel often needed for short range terrestrial viewing through a telescope; or for astrophotographic applications
- Features two locking thumbscrews to secure any inserted astronomy accessory; with a brass compression insh to prevent the marring of your telescope accessories
- Machined of high quality aluminum and anodized black; resistant for long time use
- Fits in 2 inch telescope focusers and accepts 2 inch eyepieces or accessories; Threaded for use with standand 2 inch astrophotography filters
| Item Weight | 4.8 ounces |
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| Manufacturer | Alstar |
| Item model number | SKU_AM_ETA250A |
| Product Dimensions | 2.7 x 2.7 x 3.2 inches |
| Is Discontinued By Manufacturer | No |
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