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.
- 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