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How to Install Astromania Deluxe Tele Extender？
To use the Deluxe Tele-Extender, remove the diagonal or any other accessories attached to the visual back of your telescope. Insert the 1.25” eyepiece you want to use into the visual back and lock it firmly into place with one of the setscrews. The eyepiece must have a diameter smaller than 45mm, which is the inside diameter of the Tele-Extender. Many eyepieces are too large, so double-check the fit before you begin your astrophotography session. For the most secure connection, remove the second thumbscrew from the visual back body and then slide the Tele-Extender over the inserted eyepiece as well as the visual back. When engaged, the two thumbscrews on the Tele-Extender clamp onto the visual back to hold everything firmly in place, assisted by a safety shield that keeps the thumbscrews from loosening during use.
（You can also refer to the video for more detailed operation.）
The advantages in a nutshell:
- Attachment that allows a camera to be attached to your telescope.
- The camera side of the deluxe tele-extender accepts a standard T-ring (sold separately).
- Allows you to take pictures through an eyepiece, for high magnification shots of the moon, the planets, and the sun(with the proper filtration).
- Increases schmidt-cassegrain telescope effective focal length more than 10,000mm.
- Accepts a wide range of 1.25" eyepieces, including the Omni Series.
Ingenious Design
Build-in Safety Device
It can help you to connect the visual back focuser firmly, making the connection more stable, unshakable, so as to obtain a stable image.
Internal Threaded Design
The design of the internal thread can eliminate stray light and reflected light, and makes the captured image clearer.
Machined Grip Ring
Antisked Rubber Ring could increase friction for a sure grip in even the worst conditions.
Aluminium Alloy Material
- All metal construction and anodizing aluminium process, durable for long time use.
- High-quality aluminum material makes the product lighter and easier to carry.
Package Includes:
- 1×Extension Tube
- 2×Locking Screws
Can be used with
- Astromania 1.25" 20mm 66-degree Ultra Wide Angle Eyepiece
- Astromania 1.25" 20mm Super Plossl Telescope Eyepiece
- Astromania 1.25" 26mm Super Plossl Telescope Eyepiece
- Astromania 1.25" 20mm Plossl Telescope Eyepiece
- Astromania 1.25" 25mm Plossl Telescope Eyepiece
By using the Deluxe Tele-Extender in combination with an eyepiece, you can increase your instrument’s effective focal length to well over 10,000mm! And this corresponds with a matching increase in image size. This technique is known as eyepiece projection photography. The following formula can be used to determine approximate effective focal length:
EFL = Telescope focal length/Eyepiece focal length x DF (the distance from the center of the eyepiece to the film).
Ahmad A.
Reviewed in the United States on September 4, 2020
Not Work with celestron nexstar 127slt and canon eos
Jon
Reviewed in the United States on September 30, 2020
Arrived on time, in one day, and nicely wrapped and packaged. No instructions included, but the ad on Amazon has all the information that you need to get up and running. Has the look and feel of the tele-extender sold by Celestron at more than twice the price. Works perfectly for eyepiece projection astrophotography. You will need a T-piece if you intend to use it with a DSLR.
Tommy Herr
Reviewed in the United States on June 9, 2020
i do not recommend this product.1. i do not trust the connection to the dslr, just a slight tug on the camera and it will come off of the tele-extender.2. attempted to focus on the moon, saturn and jupiter with a variety of lenses, zero success.i will try again later but for now, i am disappointed. was very excited to use the lenses to photograph the moon up close.
Jared Braunberger
Reviewed in the United States on February 22, 2020
Dont buy i just finished spending 3 hours trying to get this peice to work. It says in the discription that it will fit over the visual back and you van screw in the set screw to prevent movement. However it will not fit over the visual backs of either of my telescopes. Also i cannot use any eyepeices with this because of this issue. I can remove the visual back and put it into the telescope like an eyepeice, but no magnification is achieved. This is completly useless.
R. Andari
Reviewed in the United States on February 16, 2020
This extender is much better than a couple of alternative extenders in the market. The main advantage is it can be securely attached to the telescope without much work or any risk of coming loose.
William D. Thomas
Reviewed in the United States on December 21, 2020
Perhaps I’m doing something wrong or expecting more but I cannot get this to fit properly or establish focus on my Celestron Nexstar 8se. Product does not come with useful instructions.
Bernie B
Reviewed in the United States on May 13, 2016
i had to pull one of the screws that holds the lens in because the end is only made for one screw, but it works :)
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