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TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece

Item# TVU039
 
5.0

(6 Ratings)

Customer Q & A

Sale Price:

$199.98

List Price: $260.00
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  • 4-element design provides optimum sharpness
  • High performance and perfect for all imagining
  • Reaches parfocal point in star diagonals
  • Slows down scope for Hydrogen-Alpha solar observing
Details & Dimensions
Guarantee & Returns

What's Included?

Powermate

Description

Tele Vue 5x Powermate 1-1/4 Inch
The 5x Powermate is ideal for long focus CCD and film photography, magnifying about 7.7x. It's an attractive, high performance alternative to eyepiece projection. The 5x is also perfect for slowing down your scope for Hydrogen-Alpha solar observing.
Excellent with long eye-relief, 2" eyepieces. Using the 4x model, imagine the quality of a 35mm Panoptic at 8.8mm with 25mm of eye relief! The Powermate is NOT a Barlow so the Panoptic-Barlow Interface is not needed! The 2" Powermate" fits all the way into 2" Star Diagonals, requiring minimal refocus compared to a 2" Barlow.
To understand the Powermate, we must first understand the Barlow lens. Barlows amplify the power of a telescope. They can be considered "focal reducers" for eyepieces, or "focal extenders" for objectives. Terence Dickenson, in his Barlow test report in Sky and Telescope, July 1997, says: "Technology has erased the old objections. A modern Barlow will not degrade your telescope's optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler eyepieces and their clones have built-in Barlows, ample evidence that the lens is not some detrimental intruder." Thanks, Terence, for laying the myth of the degrading Barlow to rest.
A high quality Barlow must be properly designed and manufactured in order to avoid compromising a telescope's color and spherical aberration corrections. The "invisibility" of Tele Vue's 2-element Barlows has been noted in test reports in the astronomy magazines. However, by the nature of its negative power lens, a Barlow will do more than just increase magnification, regardless of the number of elements.
The diverging rays leaving the Barlow result in moving the exit pupil further out, thereby extending the eye relief. In short to medium focal length eyepieces the change is not noticeable. However, in the case of long focal length eyepieces, the increase can be significant and not without performance consequences.
Vignetting can occur due to the altered ray path, when the eyepiece's lenses are not large enough in diameter to allow all the rays to make it through. Shorter Barlows, or ones with too much magnification, only exacerbate the problem because the ray path entering the eyepiece is steeper.
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. This 4-element system provides the magnifying function of a Barlow without its limitations by restoring the field rays back to their original direction, as if the Powermate were not there. The result is a pure magnification increase.
Unique Benefits and Applications for Powermates
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 increase).
Higher magnifications are possible with high optical performance compared to "doubling up" Barlows.
All will reach parfocal point in star diagonals, except for the 2", 2x which comes very close.
In addition to full multi-coating, Powermates include other Tele Vue special touches such as safety undercuts where practical on the chrome barrel and captive lock screws that can't fall out, and filter threads. Our 100% QC program at f/4 insures that Powermates will add dramatic power (and NOTHING ELSE) to your favorite eyepieces.
If, for example, you own a 24mm Panoptic, you'll have the power of a 12mm focal length eyepiece with the 2.0x Powermate, 9.6mm with the 2.5x Powermate, a 6mm with the 4x Powermate, or a 4.8mm with the 5x Powermate!

 

CHOKING HAZARD - small parts may pose a risk to children under 6 yrs.

Supplier Sku:
PMT-5126
Shipping Restrictions:
Only ships in contiguous USA.

Dimensions & Specifications

Brand

TeleVue

Telescope Accessories Series

Powermates

TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece
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The Perfect Accessories

Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece
 
4.8

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Great optics (5)
  • Strong construction (3)

Cons

    Best Uses

    • Astronomy (4)
    • Astrophotography (3)
      • Reviewer Profile:
      • Casual/ recreational (3)
      • Was this a gift?:
      • No (3)

    Reviewed by 6 customers

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    Displaying reviews 1-5

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    5.0

    5x Powermate

    By Benjamin

    from Kansas City

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Great Optics
    • Strong Construction

    Cons

      Best Uses

      • Astronomy

      Comments about TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece:

      I suggest adding this to your arsenal. It's one of a kind.

      Service and delivery comments:

      Deliver went well

      • Was this a gift?:
      • No
       
      5.0

      This thing is frickin' incredible

      By Astronomy Instructor

      from Pontiac, MI

      About Me Professional Guide

      Pros

      • Compact
      • Easy To Use
      • Great Optics
      • Quality

      Cons

        Best Uses

        • Astronomy
        • Moon
        • Planets

        Comments about TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece:

        This Powermate magnifies cleanly to the optical limit. I was not expecting much from this 5x, having used a number of 2x and 3x barlows. My jaw literally dropped the first time I looked at the moon through this. The detail was incredible. Had Saturn so big that the moons were not even visible in the field of view. Bands were clearly visible. Mars actually showed features. Ordered another one of these the next day. They are not cheap but they are worth every penny! A 2x Barlow, a 5x Powermate, and a variable zoom lens are all I carry around now, and will probably stop carrying the Barlow soon.

        • Was this a gift?:
        • No

        (4 of 5 customers found this review helpful)

         
        5.0

        Great product - good vendor

        By Dave

        from Atlanta, GA

        About Me Avid Adventurer

        Verified Buyer

        Pros

        • Good Clarity Built Solid
        • Great Optics
        • Strong Construction

        Cons

        • Bulky
        • Its Big
        • Small lower lens

        Best Uses

        • Astronomy
        • Astrophotography
        • Bright Conditions
        • Terrestrial Viewing

        Comments about TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece:

        Great eyepiece. The "lowest" lens is a bit smaller than I expected, but this is part of the optics. You get lower light levels with the magnification, but the images are sharp and clear. Amazing little eyepiece. [...] competitive pricing.

        • Was this a gift?:
        • No

        (1 of 1 customers found this review helpful)

         
        4.0

        Works great

        By BurstElectronicsCEO

        from Albuquerque, NM

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Easy To Use
        • Great Optics
        • Strong Construction
        • Widely Compatible Adapter

        Cons

          Best Uses

          • Astronomy
          • Astrophotography

          Comments about TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece:

          Works great with video camera/telescope setup.

          (1 of 1 customers found this review helpful)

           
          5.0

          Excellent product!

          By Peter

          from Maryland

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Great Optics

          Cons

            Best Uses

            • Astrophotography

            Comments about TeleVue 5x Powermate 1-1/4 Inch Telescope Eyepiece:

            Great optics!

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