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Barlow Lenses and TeleXtenders are used to increase the magnification of the image you see or record on a camera. Barlow lenses are relatively simple diverging lenses and most commonly increase magnification by 2x. TeleXtenders use more complex optics to provide better quality images and are more suitable for higher powers.
The new Series 5000 TeleXtenders are the finest power multipliers sold today. Their advanced 4 element design delivers a flatter field-of-view with sharper edges than even the best 3 element apochromatic Barlows. They feature fully multi-coated lenses with no colour fringing.
Get all of the benefits from your 2" eyepieces with the new Series 5000 2x 2" TeleXtender (with 1.25" adapter). The 5x TeleXtender is a perfect match for short focal length refractors - particularly for viewing or imaging planets in minute detail.
Independent tests of the Series 5000 TeleXtenders show them to have outstanding optical performance.
This is the ideal Barlow for ETX 90, 105 and 125 telescopes.
The Variable Projection Tele-extender is designed for eyepiece projection photography at the rear cell of an SCT. A sliding mechanism enables the distance from the eyepiece to the film plane to be varied thus changing the size of the image. The effect can be likened to zooming and is particularly useful in high-resolution lunar and planetary imaging.
It can be used with most plossl and similar-sized eyepieces up to about 25mm in focal length.
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