Manufacturer: APM
Product number: APMB1,6

EUR 495,00


incl. 19 % VAT (DE)  
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APM Coma Correcting Telecentric 1.5x Barlow Lens, 2" barrel size
by the well known physicist and optic designer Philipp Keller

A few years ago APM Telescopes introduced the coma-correcting 2.7 times Barlow designed by Gerd Düring, which enjoys great popularity.

New design

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

Advantages and features of the Barlow lens
magnification 1.5 x
coma correction also for fast newtonians
M54x0.75 male thread and M48x0.75 female thread (eyepiece/CCD side)
telecentric design with 4 lenses
works as optical path corrector 1.6x for bino-viewers
large imaging field for full format chips
working distance from the M48x0.75 thread to the sensor position: 95 mm for perfect results

Magnification:1.5x
Coma correction:YES
Connection telescope side:2" barrel
Connections eyepiece/camera side:M54x0.75 male thread and M48x0.75 female thread
Design:4-element (2 groups, telecentric
Use with bino-viewer:Optical path corrector 1.6x, coma correcting
Fully corrected and illuminated field:44 mm
Working distance:95 mm from the M48x0.75 female thread
Filter thread:2"
Coating:Fully multicoated
Telecentric Barlow include 2" eyepiece adapter



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