The Baader ETX / NX4 Universal Photo-T Adapter is a multi-functional adapter for Meade ETX, Celestron NexStar 4 and C90 telescopes with a male 1.375" thread and allows you to connect photographic accessories that use either standard T2 (M42) threads or 2" SC threads.
The adapter consists of two parts:
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1.375" female to 2" SC male adapter for connecting accessories with 2" SC threads to the telescopes mentioned above. This also includes an internal thread for mounting a 1.25" filter.
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2" SC female to T2 male adapter for connecting T2 (M42) accessories such as cameras and T-rings.
Both adapters feature a knurled ring for easy gripping.
Note: only certain C90 spotting scopes have 1.375"-24 threads. Make sure you double check before ordering.