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Celestron

Celestron 93640 1.25 Inch Universal Barlow and T-Adaptor, Silver/Black

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Arrives Wednesday, Aug 19
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Style: Barlow & T-Adapter


Features

  • The Celestron Universal Barlow & T-Adapter is three accessories in one!
  • 2X Barlow: Use during visual observing to double the magnification of every 1.25 eyepiece you own
  • Prime Focus Photography: Use the T-Adapter portion of this accessory to transform your telescope into a giant telephoto lens
  • Tele-Extended Photography: Use the T-Adapter with Barlow to get double the magnification of prime focus mode
  • T-threads accept camera brand specific T-Ring (sold separately)
  • UNBEATABLE WARRANTY & SUPPORT: Buy with confidence from Celestron, a leading telescope brand in California since 1960. Your purchase includes a 2-Year US Warranty and unlimited support from our team of US-based experts.

Description

This 1. 25” accessory can be used three ways: as a 2X Barlow for visual use, as a prime focus T-adapter, or as a “Barlowed” T-adapter for double the magnification and the benefit of extra inward focus travel. The Universal Barlow and T-Adapter can be used as a 2X Barlow right out of the box. Insert any 1. 25” eyepiece into the chamber and you’ll enjoy double the magnification, while retaining all the eye relief of the inserted eyepiece. The Celestron Universal Barlow and T-Adapter can also be used for prime focus photography, which means you use the telescope as a photographic lens—a very big photographic lens! Just unscrew the bottom section of the unit to remove the Barlow and slide the chrome barrel into the telescope’s 1. 25” focuser or adapter. Lock it firmly in place with the focuser or adapter thumbscrew. T-threads on the top of the adapter screw into a T-Ring (sold separately) that is designed to attach to the brand-specific mounting flange of your DSLR or SLR camera. Please note that some telescopes, especially “fast” refractors and Newtonians, may not have enough focus travel to allow the photographic image to come to focus when used in prime focus mode. In these instances, adding the Barlow to the T-Adapter will allow the telescope to reach focus. In “Tele- Extended” mode, the Barlow doubles the focal length and f/ratio of your telescope, resulting in an image on the sensor or film plane that is twice the size of a prime focus image. Prime focus and tele-extended photography are popular for short exposure images of terrestrial objects as well as celestial objects like the Moon.

Brand: Celestron


Model Name: Celestron T Adapter/Barlow 1.25 Universal


Eye Piece Lens Description: Barlow


Objective Lens Diameter: 25 Millimeters


Telescope Mount Description: Altazimuth Mount


Product Dimensions: 1.9"D x 2.1"W x 1.9"H


Focus Type: Manual Focus


Item Weight: 65 Grams


Compatible Devices: DSLR or SLR Camera


Lens Coating Description: Multi-Coated


Eye Piece Lens Description: Barlow


Mount: Altazimuth Mount


Focus Type: Manual Focus


Compatible Devices: DSLR or SLR Camera


Coating: Multi-Coated


Focal Length Description: Standard 35 to 70 millimeters


Zoom Ratio: 21


Additional Features: Versatile 3-in-1 Barlow and T-Adapter for Visual and Photographic Use


Objective Lens Diameter: 25 Millimeters


Item Dimensions D x W x H: 1.9"D x 2.1"W x 1.9"H


Item Weight: 65 Grams


Brand: Celestron


Model Name: Celestron T Adapter/Barlow 1.25 Universal


Global Trade Identification Number: 08


Manufacturer: Celestron


UPC: 050234936408


Manufacturer Part Number: 93640-CGL


Model Number: 93640-CGL


Warranty Description: 2 years


Built-In Media: Barlow and T-Adapter


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 19

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

    • Great product, saves money and pleases with results
Style: Barlow & T-Adapter
Most happy with my purchase. First the minor cons. When I attach my DSLR camera to this T-adapter WITHOUT using the Barlow, it won't focus. I have to use the Barlow for it to gain focus. This, however is not a significant con to me because I always use the Barlow with my DSLR, otherwise magnification is just too low, so I don't really care that it doesn't focus with less magnification, I care that it focuses perfectly with 2X magnification. Then the second negative issue is that the adapter itself fits a little loose in the focuser, I feel as if it could fall off with the weight of the camera even after tightening the screws... but truth is that it hasn't fallen off and I have even moved the telescope from one place to another with the camera still on it. Now the significant pros. The Barlow is spectacular. It works perfectly as the Barlow for any regular eyepiece, it just screws on to the eyepiece and its magnification is doubled. When I bought this I was actually tempted to buy another Barlow only for eyepieces thinking it wouldn't work as I wished (although I knew it was compatible), but I gave it a shot and bought this one only to try it out. It was the best decision, a true money saver. Because of the price of this product I though that images would definitely degrade on some level when using it on regular eyepieces... but until now I do not see any degrading whatsoever. They remain as crisp and perfect as they were without using the Barlow. Additionally, although (as I have said) my camera won't focus when I don't use the Barlow, when I DO use the Barlow with it (which is always) I can even focus on close land objects (500 feet or even less). I was not expecting this, but this allows me to take pictures not only of star (primary use), but even close-ups of the surrounding Andes mountains (review written from Ecuador, South America). To me this is a true "2 in 1" product, I completely recommend it to anyone looking for a T-adapter for their DSLR. I would have given it a 4.5 if I could, but the two mentioned cons could be worked on by Celestron for it to be a perfect 5/5 to me. PS. Equipment used with this product: Dobsonian Orion XT6 telescope; 25mm and 10mm plossl eyepieces; Sony Alpha A55 DSLR with T-Mount. ... show more
Reviewed in the United States on January 21, 2012 by acevallos
    • Too much back-focus required for many scopes
Style: T-Adapter
I guess the designer of this product wanted, for some reason, to allow eyepieces to be used inside it. Or perhaps a barlow lens. But the result is an adapter that is longer than it needs to be, and that moves the camera more than an inch farther than necessary from the image plane of the telescope's primary optic. This makes the adapter unusable with most Newtonian reflectors built for visual use: the film/sensor plane of the camera can't be brought close enough to the objective to bring an image into focus. Even on a refractor of catadioptric telescope, the length of the adapter needlessly increases torque around the point where the focusing tube enters the focuser. I'm not sure whether Amazon carries any, but there are low-profile adapters that minimize this effect, and are better for most prime-focus astrophotography. UPDATE: After using this product for almost a year, I've decided that it warrants one more star than I gave it at first. The product has held up very well in fairly heavy use. I've also found that the space inside the adapter is more useful than I initially realized. I did have to purchase a shorter adapter from another source to get my camera sensor to prime focus of my Newtonian's primary mirror without a Barlow lens. But since I do have a "shorty" Barlow from which the lens can be separated, I have found that slipping that separated Barlow element into the empty space in this adapter, and securing it there with the setscrew, does make for a nice, moderately amplified image. Amazon does also sell a similar Celestron product, Celestron T Adapter/Barlow 1.25 Universal (Req. T-Ring) that puts a Barlow at the front of what appears to be this same adapter. All things being equal, however, a Barlow lens closer to the focal plane of the camera causes less amplification, requiring less of an increase in exposure (and hence less tracking accuracy). ... show more
Reviewed in the United States on June 1, 2014 by DFFranklin
    • TASCO scope must use Barlow lens
Style: T-Adapter
At first I thought it only works with Celestion scopes because the focal plane is closer than I could get with this and the canon ring. I have a case with a bunch of Celestion lenses that all work wonderfully. So I didn’t imagine this not working. Off to the forums I go, where I learned that I should try the Barlow lens with it. That works great. Only thing, it is probably close to a 2000 mm equivalent and that is a very small field of view, and hard to keep steady. Must use timer or remote. ... show more
Reviewed in the United States on September 6, 2022 by Bret Peters
    • Does what is supposed to do perfectly.
Style: T-Adapter + T-Ring 93419
It's great not a single issue. I just have to figure out how to use the crazy thing with the camera.
Reviewed in the United States on February 4, 2023 by Hood514
    • It should now look like screenshot 3
Style: T-Adapter
Review Image by mg5ds mg5ds
Review Image by mg5ds mg5ds
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Review Image by mg5ds mg5ds
Review Image by mg5ds mg5ds
Review Image by mg5ds mg5ds
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Review Image by mg5ds mg5ds
Review Image by mg5ds mg5ds
Here's the missing instruction guide (with pictures): 1) First, we need to dismantle your Celestron lens. Start by gently taking off the rubber eyepiece (see 1st 2 screenshots) 2) Unscrew the shiny metal tube on the bottom of your lens. It should now look like screenshot 3. 3) Unscrew the plastic black tube from eyepiece. The eyepiece should be facing down as you unscrew it because otherwise the lenses will fall out. It should now look like screenshot 4. 4) Now, get out your T-adapter. Unscrew the shiny metal tube from the top. It should now look like screenshot 5. 5) Take the telescope lens from step #3 and insert into the T-adapter. Make sure the screw from the T-adapter is facing up and the lens is facing down. See screenshot 6. 6) Take the shiny metal tube from step 4. Insert down the T-adapter. Hold it place with the screw from the T-adapter.It should now look like screenshot 7. 7) Flip the T-adapter upside down. Screw in the shiny metal tube from step 2. It should now look like screenshot 8. 8) Take your T-ring and screw into the bottom of the T-adapter. Next to the screw. It should now look like screenshot 9. 9) Take your T-ring + T-adapter and gentle attach it your camera. It should now look like screenshot 10. 10) Now you can attach to your telescope like a normal lens! ... show more
Reviewed in the United States on February 20, 2016 by mg5ds mg5ds

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