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William Optics 2" RotoLock Eyepiece Adapter w/ M48 Female Thread ROTO-A2-M48F

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New from William Optics - 2" RotoLock Eyepiece Adapter / Visual Back with M48 Female Thread # D-ROTO-A2-M48F

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-M48F has a 2" eyepiece holder on one side and a standard M48 female thread (M48x0.75) on the other side.


  • 2" eyepiece holder insertion depth = Xmm
  • Total length = 55.5mm
  • Maximum diameter = 75mm
  • Length of female M48 thread = 6mm
  • Weight = 6.5oz / 185g


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.

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Filed under: Eyepieces & Accessories