CELESTRON T-ADAPTER FOR NEXSTAR 4, C90 MAK & C130 MAK Hercules adapter ZWO D21 UV IR-CUT Protecting

ZWO D21 UV IR-CUT Protecting window

From 106 gain and higher

The filters of the extended UBVRI system according to Johnson and Cousins include:

It offers good correction across full-frame and illuminates a 45mm image circle

The entire focuser barrel is CNC-machined with anti-reflective baffling and matte paint

CELESTRON T-ADAPTER FOR NEXSTAR 4, C90 MAK & C130 MAK Hercules adapter ZWO D21 UV IR-CUT ProtectingThe Celestron T Adapter for NexStar 4 telescopes & C90 C130 spotting scopes allows you to reach the correct backfocus distance when using a typical 55mm image train. The T Adapter threads onto the rear cell of Celestron NexStar 4 telescopes and older C90 C130 spotting scopes and features M42 x 0. 75 male threads on the camera side. The interior surfaces are blackened and feature baffles to reduce internal reflections. Note: M42 T Ring is not included.