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William Optics 1.25" RotoLock SCT Visual Back # F-ROTO-A2-125-SCT-TA

William Optics 1.25" RotoLock SCT Visual Back # F-ROTO-A2-125-SCT-TA

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New from William Optics - 1.25" RotoLock Eyepiece Adapter / Visual Back with 2" SCT Female Thread # F-ROTO-A2-125-SCT-TA

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 SCT visual back for 1.25" diagonals and accessories is a simple combination of two other products: their SCT diagonal nosepiece and their 2"-to-1.25" Rotolock eyepiece adapter.

This WO adapter has a 1.25" eyepiece holder on one side and a standard 2" SCT female thread (2"x24TPI) on the other side. Owners of all popular SCTs will find the 2" SCT Rotolock visual back to be the perfect way to add 2" capability to their scope. It directly mounts to the 2" SCT male threads on all popular 5 - 9.25" Celestron and Meade SCTs, as well as larger SCTs if you use the 2" SCT thread adapter that those telescopes come with.


  • 1.25" eyepiece holder insertion depth = 37mm
  • Total length = Xmm
  • Maximum diameter = 60mm
  • Length of female SCT thread = 9.5mm
  • Weight = Xoz

Please note: Since this adapter is a combination of two other adapters, you will see the following differences in the product: (A) A slight difference in the gold anodizing at the two ends, and (B) a difference in the barrel diameter  in the middle, as well as a difference in the black anodizing.

Note: Occasionally, the product you receive might have a slightly different cosmetic appearance or labeling than what is shown. This can often change from batch to batch according to the whims of the manufacturer. However, you will always receive a brand new, original product as described above.

Description copyright: Agena AstroProducts - Reproduction without permission prohibited.

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Filed under: Eyepieces & Accessories