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Astromania

Astromania 1.25 Inch Collimating Cheshire Telescope Eyepiece Long Version

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Availability: In Stock.
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Arrives Tuesday, Oct 27
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Size: Long 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
  • Note: 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
  • 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 long 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: 1.25Inch Metal Collimating Cheshire Eyepiece without Laser for Newtonian Reflector Telescope - Long Version See more


Eye Piece Lens Description: Cheshire


Telescope Mount Description: Altazimuth Mount


Focus Type: Manual Focus


Power Source: Manual Operation


Finderscope: Reflex


Item Weight: 6.3 ounces


Compatible Devices: Newtonian Reflector, SCT Reflector


Lens Coating Description: aluminum


Eye Piece Lens Description: Cheshire


Mount: Altazimuth Mount


Focus Type: Manual Focus


Power Source: Manual Operation


Finderscope: Reflex


Compatible Devices: Newtonian Reflector, SCT Reflector


Coating: aluminum


Focal Length Description: 6 inches


Field Of View: 20.87 degrees


Zoom Ratio: 11


Additional Features: Cheshire Collimating Functionality


Item Weight: 6.3 ounces


Brand: Astromania


Model Name: 1.25Inch Metal Collimating Cheshire Eyepiece without Laser for Newtonian Reflector Telescope - Long Version


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


Unit Count: 1 Count


Manufacturer: Astromania


Number of Items: 1


Built-In Media: 1 x Collimating Cheshire Eyepiece (Long Version), 2 x Dust Covers


Model Number: SKU_AM_MCEL12


Manufacturer Part Number: SKU_AM_MCEL12


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

    • view too narrow for 10" Newtonian
Size: Long Version
Long version: The field of view of the long version is too narrow for my 10" f/4.7 Newtonian telescope. The view is so narrow that I cannot see all the 6 clips of the primary mirror at the same time, so the collimator does not work for me. The build quality of the unit seems solid. It might work for Newtonians with focal ratios greater than 4.7. Short version: I tried the short version as well, but the unit was defective. The crosshair was not centered in the field of view when looking from the peep hole, although it looked centered from the opposite end. I think this offset was caused by a misalignment of the 45-degree shiny metal insert relative to the tube. The offset was too large to be acceptable. ... show more
Reviewed in the United States on May 6, 2019 by KC
    • It works just as it should
Size: Short Version
Works really well, but you have to know what to expect and what to do. Read up or check online videos on how to use a collimating cheshire. The pinhole you look through on this one is very small, and the collimator is very short. The crosshairs are clear, and it works for collimating my 114mm reflector. Edited: May 4, 2018 I used this in the past few days to collimate my AR127 and ST80 refractors, so it works for refractors as well. You can unscrew and remove the crosshairs frame, a much appreciated feature of this cheshire. It looks like the crosshairs can even be screwed into any other 1.25" eyepiece, much like a filter, and used in centering stars and planets. For refractors, you should use a laser collimator to align the focuser tube to the primary lens first and foremost. If you need instructions on how to collimate a refractor, there are a lot of good resources online, especially in the backyard/amateur astronomy forums. ... show more
Reviewed in the United States on October 26, 2017 by JC
    • a solid collimating eyepiece
Size: Long Version
I use this with my 10" dob. It has a small field, so if you are very far out of collimation start by just eyeballing down the eyepiece tube and line things up. There are plenty of online resources to use these. Be aware that what it does is center the eyepiece to the center of the mirror. It isn't necessarily the case that the center of the parabolic curve is centered mechanically. Check your star shapes to make sure there isn't any coma after the collimating eyepiece is used. It is well made and all metal. ... show more
Reviewed in the United States on June 16, 2022 by EB
    • Wish I had gotten the long version
Size: Short Version
I bought this to collimate a second hand Orion XT8 that was way out of collimation. The XT8 is my second scope, but was my first attempt at collimating. It took me many hours and I still wasn’t really happy with my progress however when I finally got it outside one night I realized it was actually pretty dialed in. I’ve been using it a few times a month for a couple of months now and haven’t had to touch it again. Definitely get the long version if it fits, I wish I had. I going to soon purchase something else for collimating. ... show more
Reviewed in the United States on August 2, 2019 by Brad D.
    • Doesn't seat firmly.
Size: Long Version
The problem is the neck where it meets the focuser is not flat and square, more rounded, which allows the tube to bobble easily no matter how tight the screws so the slightest bump and the crosshairs are in a new position. The worst thing is this was intentional because the basic machining would have left a flat square face. ... show more
Reviewed in the United States on May 22, 2022 by R.A.M.
    • No batteries required!
Size: Short Version
I was given a 114mm Newtonian telescope for Christmas, and promptly dropped it on our first outing. I figured this would be a helpful tool to re-align (collimate) things. It WAS. Found some decent instructions online (don't count on usable instructions to be included) and was able to get my telescope back on track. The wire cross hairs on mine didn't seem to be centered correctly, but I was able to rotate the eyepiece to compensate. (-1 star for instructions and cross hairs). ... show more
Reviewed in the United States on June 12, 2020 by Mister C
    • key to mechanical collimation
Size: Long Version
I bought a used 10" newtonian telescope. I first purchases a laser collimator. It got me optical collimation of my scope. However, I was still not getting the full capability of my big 10" mirror! I read more and realized I needed a Cheshire collimator to achieve mechanical collimation as well. This Cheshire collimator was key to getting my secondary mirror properly positioned and aligned. This Astromania Cheshire Collimator works great, is easy to use and the price is very affordable! Thank you Astromania! ... show more
Reviewed in the United States on November 7, 2020 by C Demke
    • Saved my telescope
Size: Long Version
I used the lens cap with whole that came with telescope to collimate. Thought I was good but still didn't like image quality I was getting. Got this, couldn't believe how far off my telescope was. Looks much better now and am happy with the telescope. Saved it from FB marketplace.
Reviewed in the United States on March 2, 2021 by L. A. Jones

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