Home > Eyepieces & Barlows > Barlow Lenses > Altair-EX 3x ED Barlow Lens 1.25" barrel

Altair-EX 3x ED Barlow Lens 1.25" barrel

£29.99
Incl. VAT 20.00 % ( £5.00 )
Product Code
AEX-ED3
Manufacturer
Altair Astro
The Altair Astro Altair-EX 3x ED Barlow Lens contains ED optics for better colour correction compared to a conventional Barlow lens for improved contrast. 
 
This Barlow lens is a highly recommended accessory for webcam imaging of planets with our IR-Blocking filter (also known as an IR-Cut filter - see associated product below), or for visual obsering of the planets with your 1.25" eyepieces.
 
If you have just bought a new telescope, this is the ideal accessory for lunar and planetary viewing and it's pretty much a standard item in most telescope packages. It is higher quality than most Barlow lenses included in telescope packages.
 
Barlow lenses are designed to increase the magnification of your existing telescope eyepieces when you place the Barlow between the eyepiece and telescope. This can effectively "double" the size of your eyepiece collection by adding just one single accessory. For example a 15mm eyepiece becomes an effective 5mm high power eyepiece with the Barlow. If you have a Barlow lens, you've effectively doubled your eyepiece collection already!
 
The Altair-EX ED Barlow has two optical elements housed in a 1.25" barrel which is threaded for 1.25" standard astronomy filters, and it has an internal blackened thread to stop stray light reflection. This increases image contrast. ED optics bring the coloured wavelengths of light to a common focus which gives better performance than non-ED optics, and this also improves image contrast.
 
All optics are multi-coated, and reflections are almost invisible on the glass surface.
 
The lower lens cell portion of the Barlow can be unscrewed and threaded into standard 1.25" filter thread adapters.
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Altair-EX 2x ED Barlow Lens 2" barrel
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