This is an extremely high quality 2x barlow lens, made in Jena, Germany, by Carl Zeiss. The Carl Zeiss Abbe Barlow lens consists of two parts:
- A front barlow section ending with a photographic T-2 thread suitable to directly connect onto standard DSLR T-rings.
- A T-2 photo thread with a Baader ClickLock eyepiece clamp with the known rotary clamping locking system (direct T-2 adaptation is possible).
On the first T-2 thread you can connect normal T-rings, so you have a 2x Barlow lens – with 1¼ ” barrel – in front of a CCD/CMOS camera, webcam or a DSLR.
With this barlow, an image amplification up to three times (3x) is possible without any loss of quality by adding T-2 extension tubes. Baader recommend using their T-2 Varilock clamps for stepless adjusting of the optical length: Varilock 20-29mm (# 2956929) or Varilock 29-46mm (# 2956946)
This (german) document attests to the exceptional performance of the multi-layer anti-reflection coating applied onto the new 2016 Carl Zeiss Abbe-Barlow-Lens made in Jena / Germany. Carl Zeiss has chosen to develop and apply the very best coating ever made available to the most discriminating visual observer. The coatings feature a 0.2% loss over the exact spectral region where the night-adapted human eye is most sensitive. This extremely high efficiency also translates to near-zero coating scatter for the highest contrast ever seen. No lens-system has ever been coated to more stringent requirements for visual observation and for visual-photography as well.
The document can be found >>here<<
|OUTER CONNECTION (LENS SIDED)||Barrel, 1¼”|
|INNER CONNECTION (EYEPIECE/-CAMERA-SIDED)||Clamp, 1¼”|
|OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED)||Thread, T-2 (M42 x 0,75)|
|MAGNIFICATION (X)||2x – 3x|
|BARREL SIZE (IN)||1¼”|