Lumicon 2" diameter × 1.5" length — Drop-In Eyepiece Extension Tube Visual Adapter Use it whenever a device

Use it whenever a device in your optical train terminates in a male T-thread — a filter selector

Thread-in — threads into a 2" eyepiece

The front of your telescope radiates heat directly into the cold night sky

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sharpest starting point for astrophotography

Lumicon 2" diameter × 1.5" length — Drop-In Eyepiece Extension Tube Visual Adapter Use it whenever a deviceLumicon 2" Drop In Extension Adds 1. 5" of back focus so your eyepiece or camera can reach sharp focus. The Lumicon 2" diameter 1. 5" length Drop In Eyepiece Extension Tube drops into a 2" focuser or diagonal and accepts a 2" eyepiece on top, pushing the eyepiece back by roughly 1. 5". The larger 2" clear aperture suits wide field eyepieces and large sensor imaging, where it reduces vignetting compared with a 1. 25" light path. Specifications Barrel