Baader TZ2 Telecentric lens system 2x - doubles the focal length

Baader TZ2 Telecentric lens system 2x

Optimized for the use in H-alpha filter systems. No field curvature

Baader 2x telecentric system

The Baader telecentric system extends the focal length of a refractor without compromizing its optical performace on- or off axis. The focal plane is free of field curvature.

Fields of use

H-Alpha observation and photography of the sun}]This is the main use of this system. It is used to achieve the f/30 focal ratio needed for the solar spectrum H-alpha filters.
Lunar and planetary imaging: Although not designed for this, the telecentric allows very good results here, too.

Advantage of the telecentric system compared with standard Barlows

In contrast to a Barlow lens, the telecentric creates parallel rays allowing finest contrast and details in the whole field of view.