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Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
APM Coma Correcting Telecentric 1.5x Barlow - 2"

APM Coma Correcting Telecentric 1.5x Barlow - 2"

by APM
SKU APM-Komakorr-Barlow2
$0
$503.00 USD - $503.00 USD
$503.00
$503.00 USD - $503.00 USD
$503.00 USD
Availability:
Backordered
Contact us to know when we will receive our next ones!

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APM 2 inch coma-correcting telecentric 1.5x Barlow

by the well known physicist and optic designer Philipp Keller

Some times past APM Telescopes introduced the coma-correcting 2.7 times Barlow designed by Gerd Düring, which enjoys great popularity.

New design

When our customers asked for a 2 inch version with a smaller magnification factor APM Teleslescopes let the well known physicist and optical designer Philipp Keller calculate a new 1.5 x Barlow.

All of today's knowledge was incorporated to optimize the optical design. The telecentric design prevents that the distance has to be individually adjusted for each eyepice. Just insert the eyepiece into the optional 2-inch adapter sleeve and automatically have the optimum distance.

Large Backfocus

As already for the Barlow by G. Düring the design was calculated to yield a large back focus, in order that it can be used as an optical glass path corrector with coma-correcting effect combined with binocular viewers.
The large back focus allows the use of an off-axis guider + filter + CCD to take photographs with full format chips.

Technical Details
  • magnification 1.5 x
  • coma correction
  • M54 x 0.75 male thread and M48 x 0.75 female thread (eyepiece/CCD side)
  • telecentric design with 4 lenses
  • works as optical path corrector 1.5 x for bino-viewers
  • large imaging field for full format chips
  • 100 % illuminated Image Circle : 30 mm diameter
  • outward focus shift: 96 mm
  • Distanz end M54 Thread to Focus 95 mm

Delivery contents
  • Telecentric Barlow include 2" eyepiece adapter


Specifications

Coating:
Fully multicoated
Filterthread:
2"
Magnification:
1.5
Optical design:
2 achromatic lenses
Connectingthread:
M54 external thread and M48 internal thread
Backfocus:
105 mm (from centre last lense)
Fully corrected field:
44 mm
Fully illuminated field:
30 mm


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