Telecentric Lens Systems
Telecentric lens systems from BelOptik extend the primary focal length of the telescope similar as a Barlow lens and collimating the beam path simultaneously. They can be used to raise the necessary aperture ratio of f30 for H-alpha filter systems. In addition, I can note back focus in production for the necessary light path of a binoviewer.
Usual extension factor are
Other sizes such as example 2.5x or 3.8x or 5x are possible.
Manufacturing on request
Price 345,- EUR with T2 male thread*
495,- EUR with SC male thread**
* up to 38mm free aperture
** up to 46mm free aperture