Dismiss Notice
New Cookie Policy
On May 24, 2018, we published revised versions of our Terms and Rules and Cookie Policy. Your use of AstronomyConnect.com’s services is subject to these revised terms.

More Views

William Optics 2" RotoLock Eyepiece Adapter / Visual Back with T / T2 Female Thread # D-ROTO-A2-M42F

5.0 (1 Reviews) Read Reviews Write Review
Brand William Optics
Part Number D-ROTO-A2-M42F
Availability available

Product Info

Manufacturer Description

New from William Optics - 2" RotoLock Eyepiece Adapter / Visual Back with T / T2 Female Thread # D-ROTO-A2-M42F

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-M42F has a 2" eyepiece holder on one side and a standard T / T2 female thread (M42x0.75) on the other side.


  • 2" eyepiece holder insertion depth = Xmm
  • Total length = 55.5mm
  • Maximum diameter = 75mm
  • Lenght of female T / T2 thread = 5.5mm
  • Weight = 6.7oz / 190g


5.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
Rating Distribution
Sort by
  • Date
  • Rating
  • Useful
    1. Guest

      Skill Level
      Time with Product
      User Notes:
      Review by Steve B.
      Apr 19, 2018

      5.0 WO 2" Roto Lock visual back w/T2 female threads.




      The thing is flawless. Grips you eyepiece with a plastic collar very firmly, usually just one wrist motion.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    Sort by
    • Date
    • Rating
    • Useful