New from William Optics - 2" RotoLock Eyepiece Adapter / Visual Back with 3.28" SCT Female Thread # D-ROTO-A2-SCT328F
The new RotoLock series of adapters from William Optics may well set the "gold' standard for visual backs and eyepiece adapters in the astronomy industry! Thoughtfully designed, exquisitely machined, and artfully presented, these adapters provide a very convenient and robust method to attach eyepieces and accessories to your telescope.
Just rotate the golden grip ring clockwise to lock any inserted accessory, or counter-clockwise to release the accessory. Innovative design ensures that you get a very solid hold and the accessory is perfectly centered every time. No thumbscrews to worry about! The internal ball bearings and detents that click every few degrees make this adapter a joy to use. The large, knurled grip ring is easy to grasp with gloves on as well.
This WO adapter # D-ROTO-A2-SCT328F has a 2" eyepiece holder on one side and a 3.28" SCT female thread on the other side. It will fit the 3.28" SCT male thread on large 11-14" Celestron SCTs. Meade uses a marginally smaller 3.25" thread with the same thread pitch. Hence, while this visual back should also fit most large Meade 10-14" telescopes, there is a very small chance that it might not. This item is not for use with smaller SCT telescopes up to 9.25" aperture. For those scopes, please see William Optics item # D-ROTO-A2-SCT2F (SCT 2" RotoLock adapter).
- 2" eyepiece holder insertion depth = 41mm
- Clear aperture = 41mm (please make note of this; it may be smaller than your current opening on the rear of the scope)
- Total length = 60.5mm
- Maximum diameter = 89mm
- Lenght of female SCT thread = 10mm (6.5mm threaded, 3.5mm unthreaded shoulder)
- Weight = 7.4oz / 210g