2" Barlow Lens - 2.5x APO 4-element design - short, telecentric

The TSB225 extends the focal length of the telescope by the factor 2.5 and offers a very good illumination for 2" eyepieces and also for astrophotography.

Focal length increase 2.5x - thus the magnification is significantly increased. 

High-quality 4-element APO design for very good sharpness on axis and in the field for sharp observation and astrophotography. 

Blackened lens edges against reflections and for more contrast Telecentric optics with resulting benefits.  

At the same time, the Barlow lens is a photographic 2.5x converter for photography through telescopes with 2" focusers. 

Even full-frame sensors are illuminated. At the telescope side, the 2" Barlow has a thread for 2" filters like nebula filters for increasing contrast. 

The clamping of 2" and 1.25" accessories is done by compression rings. The 1.25" adapter is included.