Celestron Deluxe Tele-extender for Nexstar Telescopes
by Celestron
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Our Price: $61.98
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Category: Digital Camera
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Digital Photo Product Details
Manufacturer: CelestronModel: 93643
Product features:
- Increases Schmidt-Cassegrain telescope effective focal length more than 10,000mm
- Fits over telescope eyepiece
- For use with 35mm SLR cameras
- T-ring not included
- Attachment that allows a camera to be attached to Celestron Nexstar telescopes
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Digital Cameras Photo Reviews of Celestron Deluxe Tele-extender for Nexstar Telescopes
Customer Review: This is not what you want
Summary: 2 Stars
I bought this and a t-mount to allow me to take pictures through the eyepiece. It works, it does what it claims, it's pretty well built, but the pictures are terrible. Even perfectly aligned and focused, your pictures will be blurry and sad. I will try to upload two pictures. I used this a few times and it has sat unused for two years now. I only used it on an old telescope, never bothered on my new one, so maybe you can get better results, but I wouldn't endorse it.
I was able to reuse the t-mount I bought for this with a t-adapter and take great pictures of the moon using my Canon Digital Rebel SLR and some okay pictures of the Orion Nebula, but that was about it. If you want to take pictures of planets consider a webcam-type camera like the Celestron NexImage (it works ok) for $100 (and use software like Registax) or spend many hundred dollars on a good imager. You will NOT get good results with a consumer camera combined with ANY adapter on the market.
Description of Celestron Deluxe Tele-extender for Nexstar Telescopes
The Deluxe Tele-Extender for Schmidt-Cassegrain telescopes is a hollow tube that allows you to attach a camera to your telescope, with an eyepiece installed. 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).The Deluxe Tele-Extender is used for high-power lunar, solar and planetary photography as well as for extreme terrestrial photography. It fits over the telescope's eyepiece (even large eyepieces such as those in Celestron's Ultima line), and connects to the visual back of the telescope. Optional counterweights will be necessary to properly balance the telescope when using the Tele-Extender.To use the Deluxe Tele-Extender, remove the diagonal from your telescope and insert an eyepiece directly into the visual back. Place the Tele-Extender over both the eyepiece and the visual back, then attach your 35mm SLR camera to the back of the Tele-Extender, using a T-Ring. The Tele-Extender's built-in safety device will help prevent your eyepiece from becoming accidentally dislodged.There are a few things to keep in mind when using this accessTelescope Accessories
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