Product Description

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

Feature

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
Brand : Tele Vue
Item model num : PMT-2513
MPN(PartNumber) : PMT2513
EAN : 0410000032299

Attention for order international goods All items are delivered from oversea(USA,KOREA,JAPAN,Malaysia)Directly Delivery would be done local shipping company in country of Production Place and Qxpress or POST in singapore Total shipping takes 7~14 working days The item from the third country could take 2 week more than normal delivery in transit No exchange or Return is Allowed because of simple mind change
Such Return or exchange is absolutely allowed for the reason below
Major defect is discovered
Wrong item is Delivered
If you want to retunr or exchage at you cost, kindly Contact us via email
Please check when you return the item just for changing your mind, you could be charge return cost
(orginal + return shipping , duty, and etc)
You should let us know within 7 days from the date you received the item if you'd like to get a refund for the item

About Votage of electronics
The voltage of most electronics goods listed on our shop is 110V
Need transfomer to use US electronics
We cannot accept return for dameged electronic item because of not using transfomer