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Celestron's deluxe tele-extender is a high-power photographic accessory for Schmidt-Cassegrain telescopes. It's 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 telescope's effective focal length to well over 10,000mm! And with this comes a corresponding increase in image size.
It's a technique known as eyepiece projection photography, and it multiplies magnification by the distance from eyepiece center to the film plane, according to the following formula:
Effective Focal Length = Telescope focal length ? Eyepiece focal length X DF (distance to film).
The deluxe tele-extender is used for high-power lunar, solar and planetary photography as well as for extreme terrestrial photography. To employ the 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 and attach your 35mm SLR camera to the back of the tele-extender, using a T-ring. That puts you in business for fine, highly magnified astrophotography!
Note: The image you'll see through your camera's viewfinder will be upside-down. And, because of the extremely high magnifying effect afforded by the deluxe tele-extended, you'll want to take extra care to prevent camera and telescope vibration. Accurate polar alignment and using only under good seeing conditions will also help you capture high-quality images.
The deluxe tele-extender is only for Schmidt-Cassegrain telescopes!
Available for shipment to the USA and Canada only.
Dimensions & Specifications
Telescope Accessories Series
Celestron Photographic / Visual Accessories
We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.
Celestron has a limited lifetime binocular and spotting scope warranty and all other products have a 2 year manufacturer's warranty covers against defects is provided. If you have specific questions about this product's warranty please contact Celestron's Customer Service department at 310-328-9560.
Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.
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