Carl Zeiss 1.25" 2x Abbe Barlow Lens with Baader Clicklock Clamp # ZBARLOW 1603321

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Manufacturer SKU: 1603321
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Carl Zeiss 1.25" 2x Abbe Barlow Lens with Baader Clicklock Clamp # ZBARLOW 1603321

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Quick Overview

  • Q-Barlow 2.25x matched to Baader Classic Eyepieces to give evenly spaced magnifications for lunar and planetary viewing; also works with Baader Q-turret
  • Lens can be removed from extension tube to give 1.3x magnification of each eyepiece for further flexibility
  • High transmittance and contrast for a distortion-free image

Product Details

Carl Zeiss Abbe Eyepieces continue to be regarded as the finest astronomical eyepieces ever made. Around 1995, Carl Zeiss produced a very limited number of a newly designed matching 1.25" 2X Abbe-Barlow*. This doublet barlow incorporated a special high-quality ED glass, along with Zeiss' famous multicoatings, optical accuracy, smoothness, and surface quality. Discriminating planetary observers have found this to be the finest barlow ever produced. Unfortunately, due to their scarcity and unsurpassed performance, these barlows rarely surface on the secondary market, commanding extremely high prices - up to $1200 apiece!

Baader Planetarium and Alpine Astronomical are elated to now offer again the legendary Carl Zeiss Abbe-Barlow, in a new redesigned housing. Carl Zeiss has produced a new run of these barlows for 2017, specifically for Baader Planetarium. The lenses have been mounted in an all-new housing, which incorporates Baader's own Clicklock eyepiece clamp that attaches to the barlow housing via T-threads. The marriage of these two parts makes an even finer barlow than the 1995 original style. The non-marring Clicklock holder makes interchanging eyepieces a snap, firmly clamping the eyepiece with a gentle twist of the top ring. The ID of the lens cell is fully sharp v-threaded to kill stray light. The top of the Clicklock holder is height-adjustable, and removable to expose an external T-thread. This enables use of the barlow as a superb projection barlow for imaging, or with an eyepiece for projection at higher magnifications (simply add any of our T-2 Extension tubes ). The front barlow housing may also be attached to any T-threaded camera. When attached to a DSLR, the resultant magnification is approximately 2.3X.

Users of all 1.25" eyepieces will find the Baader Zeiss Abbe-Barlow to be the finest barlow they've ever used, increasing the magnification without introducing any detectable loss in sharpness or contrast. A side benefit is the increased eye-relief that comes from using longer focal length eyepieces, enabling a more comfortable and relaxed view. This compact barlow remains parfocal at 2X, minimizing the disruption to focusing when adding the barlow into the optical chain.

Baader has found that the Zeiss Abbe-Barlow works extremely well at magnifications up to 3X. Barlow users are no longer constrained to the typical 2X single magnification provided by standard barlows. The two-part housing enables users to vary the magnification of the Abbe-Barlow simply by using T-2 Extension Tubes in-between the barlow housing and the Clicklock clamp.

Owners of the prior Zeiss Abbe-I eyepieces now have an opportunity to finally complete their set, as Zeiss had intended. With the 2X Abbe Barlow, their available set of focal lengths doubles and fills-in the gaps between focal lengths (2,3,4,5,6,8,10,12.5,16,17,25,34).

Manufacturer part number: ZBARLOW or 1603321

Manufacturer Baader Planetarium
Size Format 1.25 inch
Magnification Factor 2.25x
Number of Lens Elements
Lens Coatings HT multicoated
Total Length 2.4 inches / 61 mm
Length of Nosepiece 1.1 inches / 28 mm
Outside Length of Upper Body 1.29 inches / 32.7 mm
Insertion Depth 1.1 inches / 28 mm
Max Diameter Excluding Thumbscrew 2.12 inches / 53.9 mm
Clear Aperture 0.96 inches / 24.4 mm
Weight 2 oz / 57 g
Barlow Lens Cell Removable Yes
Filter Threads at Bottom of Barlow Cell No
Filter Threads Between Barlow Cell and Tube Yes - 1.25" (M28.5x0.6) Filter Threads
Barrel Type Smooth-sided
Compatible Agena Bolt Case (with Screw Removed) 42x80
Compatible Bolt Case (with Screw Attached) 52x80
Number of Thumbscews 1
Thumbscrew Thread Specification Coming soon
End Caps (Subject to change without notice) 2
Compression Band/Ring in Eyepiece Holder No
Country of Manufacture Not disclosed by manufacturer