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© 2015 Orion Telescopes & Binoculars

IN 450 Rev. B 03/15

orion

®

 High-Power 4-Element 

Barlow lenses

#8470 High-Power 1.25" 2x 4-Element Barlow 

#8707 High-Power 1.25" 3x 4-Element Barlow 

#8715 High-Power 1.25" 5x 4-Element Barlow 

#8471 High-Power 2" 2x 4-Element Barlow

Orion 1.25" and 2" High-Power Barlow lenses 

(Figure 1)

 boost the 

magnifying power of any telescope eyepiece they are used with. With 
different models featuring magnification factors of 2x up to 5x, these 
premium-quality Barlows get you closer to your telescopic target, be it a 
planet, the Moon, or a deep-sky object. Their exceptional optical quality 
and mechanical craftsmanship will appeal to the discriminating amateur 
astronomer who wants only top-notch performance from his or her 
equipment.

Figure 1

. The Orion High-Power Barlow Lens series includes the 2” 2x model and 

1.25” 2x, 3x, and 5x models.

Summary of Contents for 8470

Page 1: ...Barlow 8471 High Power 2 2x 4 Element Barlow Orion 1 25 and 2 High Power Barlow lenses Figure 1 boost the magnifying power of any telescope eyepiece they are used with With different models featuring magnification factors of 2x up to 5x these premium quality Barlows get you closer to your telescopic target be it a planet the Moon or a deep sky object Their exceptional optical quality and mechanica...

Page 2: ... 2 eyepieces The 2 Barlow includes a separate 2 to 1 25 adapter that allows use of 1 25 eyepieces and accessories Figure 2 When it s removed the 2 collar is available for use with 2 eyepieces or accessories Each High Power Barlow lens has an enhanced 4 element lens design that minimizes chromatic and spherical aberrations and preserves sharpness and contrast Images appear flatter sharper and bette...

Page 3: ...internally blackened and glare threaded to help prevent internal reflections from reducing image contrast The barrels have a recessed safety slot to prevent the Barlow from falling out should the locking thumbscrew become loose during use The barrels are threaded at the end for use with Orion 1 25 or 2 filters depending on the model Figure 4 Use of Orion High Power Barlows For refractors and Schmi...

Page 4: ...the 3x or 5x High Power Barlow may exceed the maximum practical magnifying power of your telescope and eyepieces Generally the maximum practical magnification a telescope can deliver is about 50x per inch of aperture diameter of the main lens or mirror Any higher and the images seen will likely just be blurry and dim Seeing conditions i e steadiness of the atmosphere often limit the useful magnifi...

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