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Astromania

Astromania 1.25Inch Metal Collimating Cheshire Eyepiece Without Laser for Newtonian Reflector Telescope - Short Version

    • Based on 190 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, May 22
Order within 13 hours and 37 minutes
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Size: Short Version


Features

  • Fits in 1.25" focusers and easy to use;simply cap the telescope, remove the diagonal, and place the eyepiece directly in the focuser.
  • For aligning optics of Newtonian reflectors, Dobsonian reflectors, and Schmidt-Cassegrain Telescopes (SCTs).
  • The short collimator for mirror (reflector) telescopes has a 45 degree plate for easier visual accuracy.
  • Item was made by aluminum with crosshair at the bottom allow quick and precise centering of the optics.
  • This collimation eyepiece can be used for precisely collimating the Newtonian and Schmidt-Cassegrain reflector telescopes for better image quality.

Product Dimensions: 6 x 1.3 x 1.3 inches


Item Weight: 3.1 ounces


Item model number: SKU_AM_MCES1


Is Discontinued By Manufacturer: No


Date First Available: March 25, 2016


Manufacturer: Astromania


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 22

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

    • Works great after a little tweaking
Size: Long Version
This tool can be used to get your Newtonian scope into good collimation. It can help you get the secondary mirror aligned with the focuser, align the secondary with respect to the primary, and collimate the primary. First, though, the tool itself needs a bit of adjustment. The crosshairs are made of fine copper wire, and were slightly loose and bent on mine. They are glued into holes in a ring that threads into the end of the tube. Removing the ring and gently pulling one end of each wire with needle nose pliers got the crosshairs taught and centered. After that, I was able to use this tool to properly collimate my telescope. ... show more
Reviewed in the United States on November 14, 2022 by Mark Stevens
    • Best way to collimate a reflecting scope...
Size: Short Version
Since many laser collimators are not collimated themselves, a cheshire eyepiece is always the safest bet to check collimation...
Reviewed in the United States on November 9, 2022 by Mark J. Swantkowski
    • 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
    • Beautiful piece of metalwork.
Size: Long Version
Review Image by Warren Richardson Warren Richardson
This Cheshire eyepiece enables a precise adjustment of the secondary mirror, once you get it spaced correctly. A four inch extension was right for my ten inch Newt.My mirror was significantly off, requiring adjustment. I expect an improvement in my pictures. It's surprising to find such a well made item these days; the eyepiece is beautifully manufactured of heavy duty metal with an excellent finish. For the money it's an unbeatable value, if you have Newtonian telescope you need this. ... show more
Reviewed in the United States on October 24, 2022 by Warren Richardson Warren Richardson
    • 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
    • Loose copper wires
Size: Short Version
This is a collimation cap at best... Copper wires can be easily moved with the touch of a finger, collimation will not be consistent however it might be good enough in slower scopes. I'd go for the $30 svboney one with fixed steel wires that are actually in the center
Reviewed in the United States on March 20, 2023 by Sammy J
    • Inexpensive collimator
Size: Long Version
I used this to collimate my 114mm reflector, following the directions from a YouTube video by Orion Telescopes. It worked perfectly.
Reviewed in the United States on September 27, 2022 by Paul Dorman
    • 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

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