Barlow Lenses and Tele-extenders

Barlow lenses are used in series with the other optics of a system to increase the overall focal ratio of the system. In astronomical applications the Barlow lens is placed between the focuser and the eyepiece. The net effect is to increase magnification. Barlow lenses are commonly labeled by the amount of magnification they induce. 2X and 3X Barlows are the most common, but others are also available.

Barlow lenses offer an economical means to extend an eyepiece collection, but they do have some performance limitations when used with long focal length eyepieces or for imaging. Barlow lenses increase the eye relief of any eyepiece, which can be problemativ with eyepieces that already have a substantially long eye relief. Barlow lenses also move the focal plane for imaging applications. We recommend the TeleVue Powermate for imaging applications.

Celestron Omni 2x Barlow - 1-1/4

This is a high quality 2x Barlow that doubles the magnification of all 1.25 inch eyepieces. This economically priced Barlow has great features like, low profile, 2-element fully-multicoated optical design and blacked lens edges.

$45.00

Celestron Ultima 2x Barlow

This Ultima Barlow lens is, without doubt, the #1 choice among amateur astronomers who want the best performance from their optics. The Ultima Series Barlow (2x - 1-1/4 inch) is an air-spaced, 3-element apochromatic design with a 27mm clear aperture.

$80.00

Takahashi TOA130EX Extender and Corrector

Takahashi TOA130EX tele-extender, 1.6X magnification, 2-inch format, used with Takahashi TOA series refractors to extend focal length for lunar/planetary observing and imaging.

$419.00

TeleVue Paracorr Visual Coma Corrector

TeleVue Paracorr Coma Corrector for fast Newtonian Optical Systems. An optical chain is as good as its weakest link. With the development of 82 degree Nagler eyepieces, Tele Vue offers the largest, flattest and best corrected visual fields in the industry

$319.00

TeleVue 2x Barlow 1 1/4"

Features include parfocal-ization, 1.25 inch filter threads, captive lock screws that won't fall out and full multicoatings.

$95.00

TeleVue 3x Barlow 1 1/4"

Features include parfocal-ization, 1.25 inch filter threads, captive lock screws that won't fall out and full multicoatings.

$95.00

TeleVue BIG Barlow 2x 2"

Offered in a 2x magnification, the Big Barlow is ideal for Newtonian scope owners. It will be parfocal with both 2inch and 1.25 inch eyepieces in this application. Features include threads for 48mm filters, captive lock screw and full multi-coatings.

$185.00

TeleVue Panoptic Barlow Interface

TeleVue Panoptic Barlow Interface. You can double the power of any eyepiece with the 2x Big Barlow, but adding the interface lens brings the pupil back to original position when used with long focal length eyepieces such as the Panoptic 41, 35, or 27mm

$65.00

TeleVue Powermate 2.5x 1-1/4"

TeleVue 2.5x 1 1/4 inch Powermate We had to go beyond the Barlow concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate™ consists of a negative doublet plus a positive “pupil-correcting” doublet.

$174.00

TeleVue Powermate 2X 2"

TeleVue 2x 2 inch Powermate. We had to go beyond the Barlow concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate™ consists of a negative doublet plus a positive “pupil-correcting” doublet.

$264.00

TeleVue Powermate 4X 2"

TeleVue 4X 2 inch Powermate. We had to go beyond the Barlow concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate™ consists of a negative doublet plus a positive “pupil-correcting” doublet.

$279.00

TeleVue Powermate 5x 1-1/4"

TeleVue 5x 1 1/4 inch Powermate. We had to go beyond the Barlow concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate™ consists of a negative doublet plus a positive “pupil-correcting” doublet.

$174.00