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Televue 2.5x Powermate 1.25 inch (1-1/4 in.)

4.9 (8) Write Review
Free shipping on orders over $29.99

$229.00

$ 99 .00 $99.00

In Stock

About this item

  • Latest Version, Accepts the T-Ring Adapter
  • Vignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.
  • Telecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.
  • High performance for image amplification, CCD or film (some of the finest Earth-based planetary imaging is being done with Powermates).
  • Flexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance i


Tele Vue Barlows: "An Optically Perfect Window " Properly designed Barlows do wonderful things. First, they amplify power while retaining the eyepiece's eye-relief. Second, they slow the telescope's f/#, which improves eyepiece sharpness. Third, the designer can introduce compensations for eyepiece aberrations. The 2.5X Powermate Barlow is a 4-element parfocal, compact amplifying lens system. POWERMATE consists of a negative achromatic doublet plus a positive "pupil-correcting" doublet. While it looks and functions like a Barlow, your eyepiece will operate with pupil locations where the designer intended, avoiding mismatch problems. POEWRMATE optimally mates its power to your eyepieces. No additional "interface lens" is needed, since POWERMATES have it built-in. In addition to full multi-coating, POWERMATE includes other Tele Vue special touches such as a safety undercut on the chrome barrell, and captive lock screws that can't fall out. Tele Vue's 100% QC program at f/4 insures that POWERMATE will add dramatic power (and NOTHING ELSE) to your favorite eyepieces. If, for example, you own a 22mm Panoptic, you'll have the power of an 8.8mm focal length eyepiece with the 2.5x POWERMATE. The POWERMATES are constructed to be parfocal with Tele Vue's 1-1/4" 90 degree diagonal (often used in Ranger telescopes) adding convenience not previously available with any Barlow. The 2.5X POWERMATE has no filter threads Dobsonian/Ne


Johnny
Reviewed in the United States on March 11, 2025
Excellent!
James lawton
Reviewed in the United States on February 23, 2022
I am very pleased with the image quality of this barlow alternative. I use it on my Celestron C11 f10 connected to my cmos asizwo planetary camera. The images shown are the first light images with all of the equipment and I really didn't know what I was doing. Images will be outstanding with practice. I couldn't be happier with this 2.5x.
Mike
Reviewed in the United States on May 19, 2021
Top equipment for my astro setup. Unfortunately do not suitable for my solar Coronado PST and my ZWO camera, but anyway best thing.
William D. Thomas
Reviewed in the United States on November 5, 2021
Televue is a telescope eyepiece manufacturer with a great reputation and this Barlow 2.5x is no exception. Hard to find any better at any price.
Larry Robinson
Reviewed in the United States on April 2, 2020
High quality product, the customer service is quick to answer back emails and very pleased with the Powermate 2.5x
Dora
Reviewed in the United States on June 5, 2016
Well, I'm sure it does work, and with long focal lengths, and I have seen a sharp image once the few times I've tried it, and I've only tried it on my little galileo (6 inch) and still have yet to try it on my dob and my cat. Hopefully after back surgery I'll be able too handle those!!;)) So here I do give it 5 stars BUT I have much more stargazing to do, before I can know for sure. Ask me a year from now (add three months for recovery) then I'll letchya know.
Frank
Reviewed in the United States on June 24, 2016
Works great with my ZWO ASI120MC camera and a 14" Dob. Will have to try it with my Explore Scientific 14mm and 6.7mm 82° eyepieces.The benefit of this Powermate over a barlow is a bit hard to describe. A Barlow will extend the eye relief of your eyepiece while increasing the effective magnification. So, if you have a 20m eye relief eyepiece, about right for those of us that wear glasses, the eye relief with the barlow can be sometimes double that, making it harder to get the object in the correct field of view. A Powermate will increase the effective magnification while also preserving the eyepiece's eye relief.And Televue uses better glass, IMO. Purists will say that the more glass in the optical path the worse the image, but it also depends on the quality of the glass used. My intention with this Powermate is to use with my camera and for double stars and to get a visual on Neptune and Triton this fall.
Cobretti
Reviewed in the United States on September 8, 2013
The pictures I took with this Powermate were not nearly as good as the pictures I took with the free barlow I got as a promotional gift with the purchase of my Meade LX90 10inch SC. That and the Powermate barely fit in my telescope. It was so tight I had to turn it like a bolt to get it to fit in.I was so disappointed. I was worried the the quality of my pictures would just be ever so slightly better, but I figured it's the price one has to pay to get that extra edge. When the pictures I took came out actually worse, I said "nope, this is not acceptable".Maybe this item is designed for telescopes that are nicer than mine.Amazon and/or the dealer promptly returned and refunded the item.