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William Optics 2" to 1.25" RotoLock Eyepiece Adapter / Visual Back with T / T2 Step Ring Insert # F-ROTO-A2-125-M42F

5.0 (2 Reviews) Read Reviews Write Review
Brand William Optics
Part Number F-ROTO-A2-125
Availability available

Product Info

Manufacturer Description

New from William Optics - 2" to 1.25" RotoLock Eyepiece Adapter with T / T2 Step Ring Insert # F-ROTO-A2-125-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!

This WO adapter # F-ROTO-A2-125-M42F has a 1.25" eyepiece holder on one side and a 2" tapered barrel with standard M48 female filter threads (M48x0.75) on the other side. In addition, it also includes a step-down ring with M48 male threads on the outside and T / T2 (M42x0.75) female threads on the inside. Insertion of this step ring into the adapter converts the adpater to a 1.25" T / T2 visual back, allowing you to use it with a wide variety of telescopes and accessories that have a male T / T2 thread.

Note that the adapter comes with the step down ring installed, and while you can use an ordinary screwdriver tip or other tool to screw or unscrew it, a spanner wrench will make this job a lot easier. However, no tools are included with this adapter.

Specifications

  • 1.25" eyepiece holder insertion depth = Xmm
  • Total length = 37mm
  • Optical length = 12.5mm
  • Maximum diameter = 57.7mm
  • Length of female M48 thread = Xmm
  • Length of female T / T2 thread = Xmm
  • Weight = 3.5oz / 100g

Reviews

5.0 (Based on 2 Reviews) 100% of reviewers recommended this product.
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    1. Guest

      Skill Level
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      User Notes:
      Review by Steve B.
      1519398675
      Feb 23, 2018

      5.0 Roto Lock Adapter

      Pros:

      Cons:

      Comments:

      Beautifully made, works flawlessly. Compression ring is wide plastic. Usually locks with just a quarter turn.

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Steven S.
      1490403049
      Mar 24, 2017

      5.0 1.25 inch visual back.

      Pros:

      Cons:

      Comments:

      Well machined; works great and is a big improvement over the "thumb screw" backs that come with a telescope.

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

      This review was provided courtesy of AgenaAstro.com

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