Tele Vue 2.5x Powermate Barlow lens 1.25" - T Ring Adaptable.

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
Product Details
  • 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
  • Binding: Electronics
  • Brand: Tele Vue
  • EAN: 0410000032299
  • Label: Tele Vue
  • Manufacturer: Tele Vue
  • Model: PMT2513
  • MPN: PMT2513
  • PackageQuantity: 1
  • ProductGroup: Photography
  • ProductTypeName: CAMERA_OTHER_ACCESSORIES
  • ProductTypeSubcategory: other-telescope-accessories
  • Publisher: Tele Vue
  • Studio: Tele Vue
  • UPC: 410000032299

Customers who bought this item also bought

Electronics Articles

Laptop Guide
After reading through this laptop guide, you'll know more than 99% of all laptop buyers.  The guide is divided into five sections: Section #1 - Overview of laptop computers Understand all the basic features of the laptop computer so you can buy the best machine for you.  Section #2 - Main laptop parts Make your choice of memory, processor and laptop storage devices. Section #3 - Notebooks and networks Computing nowadays is all about connectivity, so it's essential that your laptop computer can connect up to almost anything. Section #4 - Ports and slots Everything you need to know about those strange plugs and sockets you'll find in every laptop computer. Section #5 - Getting ready to buy Laptop Buyer's Checklist. Why buy a laptop instead of a desktop PC Before you buy a laptop you need to understand the critical differences between a mobile computer and the much less mobile desktop, so you can decide which laptop features are most important to you. Choose t ...
Finding the Right DVD Camcorder
Introduction DVD camcorders are becoming very popular, and you may be finding yourself wishing you had one. Just like any camcorder whether it be a digital video camera, or a hi definition camcorder, or a DVD camcorder you want to make sure you get a good one. You will need to do a little research to make sure you get the one that will work best for what you will use it for. You will also want to compare features and prices before making your big purchase. -------------------------------------------------------------------------------- Making the purchase of a DVD camcorder can be an incredibly big step in your life. It basically shows that you are willing and able to keep up-to-date on the newest and most technologically advanced devices, and that you are interested in maintaining an electronically advanced network system. What is a DVD Camcorder? The DVD camcorder is a device which was first introduced in 2000, and which has evolved considerably over the years. It is now a ...