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Astromania 1.25 Inch Collimating Cheshire Telescope Eyepiece Short Version

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Availability: 12 left in stock
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Arrives Tuesday, Oct 27
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Size: Short Version


Features

  • Fits in 1.25 inch focusers and is easy to use; Simply cap the telescope, remove the diagonal and place the eyepiece directly in the focuser; This universal compatibility makes it a convenient 1.25 inch collimation eyepiece for any telescope setup
  • Designed for aligning optics of Newtonian reflectors Dobsonian reflectors and Schmidt-Cassegrain Telescopes; Whether you own a fast Newtonian or a compact SCT this crosshair eyepiece is a reliable telescope alignment tool
  • The short version is optimized for telescopes with fast focal ratios quicker and more accurate collimation; The shorter barrel design offers better clearance and easier handling in fast Newtonian and Dobsonian telescopes
  • Accurate collimation is essential for high power observing; With this cheshire eyepiece stars will become more like pin points of light and planetary and lunar detail will be enhancedunlocking the full potential of your telescope's optics
  • Collimating cheshire eyepiece is made of aluminum with crosshair at the bottom that allows quick and precise centering of the optics; Metal construction ensures long-lasting performance while fine crosshair provides accurate reference for aligning mirrors
  • This collimation eyepiece can be used for precise collimation of your telescope for ensuring perfect alignment of the primary and secondary mirrors; It is an essential telescope accessory for achieving telescope alignment in telescopes
  • Experience sharper high-power views after proper collimation; Use this collimation tool to achieve pinpoint stars and crisp planetary details; Ideal choice for both beginners and experienced astronomers who align from Newtonian or Dobsonian telescopes
  • Backed by Astromania's quality assurance this 1.25 inch crosshair eyepiece is a dependable and affordable upgrade for your telescope toolkit; Whether you are collimating a Dobsonian or fine-tuning an SCT this eyepiece offers excellent value and precision
  • The short collimator for mirror telescopes features a 45 degree plate for easier visual accuracy; This angled plate allows to view the crosshair and the primary mirror reflection simultaneously for simplifying collimation process and improving precision

Description

The Collimating Eyepiece will take care of both of these problems, allowing you to achieve precise collimation without “guessing,” and thus improve your telescope’s performance. Contains detachable lens covers to protect the product from dust when not in use, which can be turned down directly when in use. The cross-hair adopts strong and durable steel wire instead of easily broken copper wire or aluminum wire. It has a polished flat set in the barrel at 45° angle, which directs light entering from cutout in the side of the barrel down into the optical path. Excellent black aluminium alloy construction, giving the holder a refined and smooth appearance and more resistant. Collimation is the process by which an instrument’s optical components are brought into precise alignment with its optical axis and mechanical axis. The Long Version is specifically used for all Newtonian telescopes; Its extended barrel ensures proper reach in longer focusers for making it a versatile collimation eyepiece for Newtonian owners Chesire eyepiece can be mounted on 1.25 inch focuser of telescopes, which achieve more quick and accurate alignment during astronomical journey. Laser Collimator Laser Collimator Collimating Cheshire-Long Collimating CheshireShort 7-21mm Zoom Eyepiece 8-24mm Zoom Eyepiece 2" ED 2x Barlow Lens

Brand: Astromania


Model Name: RM


Eye Piece Lens Description: Collimating


Objective Lens Diameter: 31.75 millimeters


Telescope Mount Description: Altazimuth Mount


Product Dimensions: 6"D x 1.3"W x 1.3"H


Focus Type: Manual Focus


Power Source: Manual


Finderscope: Reflex


Item Weight: 3.1 ounces


Eye Piece Lens Description: Collimating


Mount: Altazimuth Mount


Focus Type: Manual Focus


Power Source: Manual


Finderscope: Reflex


Compatible Devices: Telescope, Telescope Mount, Telescope Eyepiece


Coating: StarBright XLT


Focal Length Description: 6,6 cm


Additional Features: Collimating functionality


Objective Lens Diameter: 31.75 millimeters


Item Dimensions D x W x H: 6"D x 1.3"W x 1.3"H


Item Weight: 3.1 ounces


Exit Pupil Diameter: 5 millimeters


Optical Tube Length Measurement: 2.6 inches


Brand: Astromania


Model Name: RM


Global Trade Identification Number: 46


Item Highlight: For Aligning Newtonian Reflectors Telescope, Telescope Collimation Tool, for Planetary Moon Deep Sky Astronoical Observation


Manufacturer: Astromania


Model Number: SKU_AM_MCES1


Manufacturer Part Number: SKU_AM_MCES1


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Excellent Quality for the Price !
Size: Short Version
Works very well !
Reviewed in the United States on July 21, 2026 by Herb H

  • Does the job well, at half the price of other competitors.
Size: Short Version
I rate 5 stars for shipping and handling. I got this item in half the time I expected it. So kudos to the seller for excellent service. I rate 4 stars for the item. It is a good item that gets the job done quite well. The cross-hairs for mine were spot-on. I shone a laser through the peep-hole and the laser struck the hairs dead-center (laser sat flush against collimator surface), so I know the hairs were very close to true. My only complaint was that this collimator sat a little too loosely in the focuser tube of my telescope, though I believe this was more the telescope's fault than the collimator. Other things I like about this item is that it is made out of solid aluminum, has a nice reflective surface on the "bull's eye", and has a pop-up eye cup for getting a better view inside the telescope. I do recommend this item. It is a very essential part of a Newtonian telescope kit. If you want to save some money, but want to get the best possible view out of your telescope, then get this item. You will not regret it. ... show more
Reviewed in the United States on August 6, 2018 by Amazon Customer

  • Really works!
Size: Short Version
Excellent item that really works!
Reviewed in the United States on February 5, 2026 by joe kelenfy

  • Nicely priced
Size: Short Version
Very well made. The cross hairs were perfect, and the eyepiece itself is a nice tool for its' low price. I bought both long and short and both are perfect.
Reviewed in the United States on August 20, 2025 by Robert

  • Simple and Effective
Size: Short Version
Laser collimators are really convenient until you realize the device didn't hold calibration from shipping. Easier to ditch the convenience and get a Cheshire that's nearly as simple to use with the added peace of mind not having to worry if a laser is out of alignment. The only downside is being restricted to collimating your telescope during the day. You need plenty of light to use this bad boy. ... show more
Reviewed in the United States on December 20, 2022 by Steven

  • Works good, center hole slightly off
Size: Short Version
Works good for what it is. The center hole is slightly off because when I spin it, the view of the edges gets wider or narrower in a specific area. It is very slight, and I would still order this again for the price. Crosshairs seem centered.
Reviewed in the United States on July 27, 2020 by Five Tribe Boutique

  • May have made collimation worse
Size: Short Version
I am not sold on this collimator. The first issue is no instructions. Should you have a separate light for illuminating the angled reflection plate, should the scope end cap be left on or off, and other undefined questions. I have read about Cheshire collimators and there is some help but not enough to do a good job with this unit. I am trying to collimate a Nexstar 5 SCT. We are in the fog/cloudy season right now and evening stars are unavailable to confirm if this has helped or hindered the focus of the scope, thus far with terrestrial viewing it seems to have made it worse. Another issue is purely mechanical as the cross hairs are so close to the eye there appears to be more than one set and blurry. I can read without glasses so it is not my eye sight. Perhaps the seller can educate me so I can give a more positive review but right now I am disappointed. Update: the seller contacted me with instructions and they basically say unless your secondary mirror is about to fall off this will not help with collimation on a SCT. I am going to play around with it rather than send it back to see if I can make some use of the mirror reflections. The product is well made. ... show more
Reviewed in the United States on May 31, 2017 by Harry

  • Works great
Size: Short Version
Works great. Very reasonable price.
Reviewed in the United States on July 21, 2025 by tsk

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