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William Optics 2" to 1.25" RotoLock Eyepiece Adapter # F-ROTO-A2-125

4.7 (18 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 # F-ROTO-A2-125

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 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.

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
  • Weight = 2.8oz / 79g

Reviews

4.7 (Based on 18 Reviews) 94% of reviewers recommended this product.
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    1. Guest

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      Review by P. M.
      1561216929
      Jun 22, 2019

      5.0 RotoLock Eyepiece Adapter

      Pros:

      Cons:

      Comments:

      I initially purchased a blue one to evaluate how I liked the adapter mechanism performance while changing out eyepieces. After three months I ordered a red one, so I guess these RotoLock adapters kind of grow on you.

      Nice build quality and performance for changing eyepieces while holding very securely when needed.

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Mike J.
      1560389892
      Jun 12, 2019

      5.0 Great Setup

      Pros:

      Cons:

      Comments:

      Works well. After realizing my expensive camera was being held by a thumbscrew I chose this. Hold camera solidly and evenly. Excellent design.

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

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by Cameron S.
      1540302747
      Oct 23, 2018

      5.0 William Optics 2" to 1.25" RotoLock Eyepiece Adapter - Gold

      Pros:

      Cons:

      Comments:

      I like how a full collar locks the eyepiece. Seems well made and much more reliable than a standard thumbscrew,

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

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by STEPHEN L.
      1536668481
      Sep 11, 2018

      5.0 Great Eyepiece Holder

      Pros:

      Cons:

      Comments:

      Screw-lock eyepiece or Barlow holders offer the advantage of applying pressure all the way around the barrel of the eyepiece as opposed to a screw pushing from one side. This product has the great fit and finish as well as functionality typical of William Optics products.

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

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by John P.
      1535905342
      Sep 2, 2018

      1.0 Overly engineered

      Pros:

      Cons:

      Comments:

      If you like wrestling with your scope in the dark, buy this. Makes a nice paper weight.

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

      This review was provided courtesy of AgenaAstro.com

    6. Guest

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      Review by C D.
      1530463594
      Jul 1, 2018

      5.0 Very convenient Adapter

      Pros:

      Cons:

      Comments:

      I far prefer locking rings to set screws or compression rings, and this is a particularly nice design as the aggressive ribbing makes it easy to confidently lock in and out of position. I bought the red one which is a perfect match for the red trim on my scope :)

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

      This review was provided courtesy of AgenaAstro.com

    7. Guest

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      Review by AXEL B.
      1511147108
      Nov 19, 2017

      4.0 A must have with a

      Pros:

      Cons:

      Comments:

      A must have with a 2” Rotolock diagonal

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

      This review was provided courtesy of AgenaAstro.com

    8. Guest

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      Review by Rodney P.
      1510368729
      Nov 10, 2017

      5.0 Great adapter!

      Pros:

      Cons:

      Comments:

      The best I've ever used, firm grip with light turning pressure.
      Very well machined and finished.

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

      This review was provided courtesy of AgenaAstro.com

    9. Guest

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      Review by Richard G.
      1509116442
      Oct 27, 2017

      5.0 Rotolock works great in my William Optics Z61

      Pros:

      Cons:

      Comments:

      Works as advertised. I recommend this products, makes it really easy to insert eyepieces into your scope.

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

      This review was provided courtesy of AgenaAstro.com

    10. Guest

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      Review by Gary S.
      1508775387
      Oct 23, 2017

      5.0 Rotolock

      Pros:

      Cons:

      Comments:

      Works great! Better than fumbling for a small thumbscrew. Just takes a gentle twist.

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

      This review was provided courtesy of AgenaAstro.com

    11. Guest

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      Review by James J.
      1507729985
      Oct 11, 2017

      5.0 Rotolock adapter

      Pros:

      Cons:

      Comments:

      There are a number of similar adapters out there, but this one is the best I have found. It is smooth and secure in operation, and the inner sleeve that tightens around the eyepiece barrel is long enough to work with all eyepieces I have tried, no matter the shape or 'safety' contour(some adapters don't tighten w/ some eyepieces). As with all William Optics products I have seen, fit and finish are second to none. Agena service is also the best.

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

      This review was provided courtesy of AgenaAstro.com

    12. Guest

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      Review by Kenneth L.
      1495615706
      May 24, 2017

      5.0 william optics rotolock adapter

      Pros:

      Cons:

      Comments:

      the William Optics rotlock has a very smooth precision built locking mechanism- eyepieces are installed and swapped quickly & easily and are held securely with only a small amount of rotation of the collar and it releases without fuss or effort . a very classy, high quality adapter as well being very reasonable in price

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

      This review was provided courtesy of AgenaAstro.com

    13. Guest

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      Review by RALPH K.
      1488945143
      Mar 7, 2017

      5.0 Rotolock works great

      Pros:

      Cons:

      Comments:

      Slightly easier to use than the Antares version, but can be overtightened. It only takes a partial turn and slight pressure to lock in your eyepiece.

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

      This review was provided courtesy of AgenaAstro.com

    14. Guest

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      Review by Richard S.
      1488101480
      Feb 26, 2017

      5.0 Perfect!

      Pros:

      Cons:

      Comments:

      If you don't like dealing with screws on you eyepiece or camera... This is what you need.,.

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

      This review was provided courtesy of AgenaAstro.com

    15. Guest

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      Review by Ed R.
      1482175896
      Dec 19, 2016

      5.0 Very good adapter

      Pros:

      Cons:

      Comments:

      I'm very pleased with the quality of my WO Rotolock adapter. It's very easy to use, gentle on my eyepieces yet holds them with a "vice-grip". After using it for several months now I have complete confidence that it's not ever going to eject one of my expensive EPs.
      Great product.

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

      This review was provided courtesy of AgenaAstro.com

    16. cturek

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      Review by Carl T of O'Fallon, MO.
      1463184000
      May 13, 2016

      5.0 Great Product

      Pros:

      Easy to Use,Strong Construction,Accurate,Compact,Lightweight

      Cons:

      None

      Comments:

      I participate in a lot of astronomy public outreach sessions where you change eyepieces often. I was looking for an adapter that would let me change EP's quickly yet securely. This adapter looked like it would do the job. The unit is very well made. You only have to turn it a small amount to release the eyepiece. Another small turn securely grabs the next EP.

      Don't be concerned if, when you first use the adapter, it seems a little difficult to get the EP inserted. I quickly learned that you need to hold the EP at a slight (10-15 degrees) angle when you insert the EP. Doing this, the EP guides itself in. After a couple of uses, this becomes second nature.

      I'm very happy with this adapter.

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

      This review was provided courtesy of AgenaAstro.com

    17. Guest

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      Review by Charlie of Saint Paul, MN.
      1463184000
      May 13, 2016

      5.0 RotoLock 2" to 1.25" Adapter

      Pros:

      Lightweight,Strong Construction,Accurate,Compact,Easy to Use

      Cons:

      Comments:

      Very helpful product. I use it in conjunction with my 2" RotoLock and never have to worry about my lens falling out. Very positive connection, and the rotation allows me to set the tension I desire. I strongly recommend this product.

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

      This review was provided courtesy of AgenaAstro.com

    18. Guest

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      Review by telescope tom of Tucson.
      1436140800
      Jul 5, 2015

      5.0 Best 1.25" adapter

      Pros:

      Easy to Use,Lightweight,Strong Construction,Compact,Accurate

      Cons:

      Comments:

      The Roto Lock is the best ever twist eyepiece clamp, accepts a wide variety of barrels, unlike the Baader, and the plastic inner sleeve means no marks on the barrels, very nice.

      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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