in stock
in stock

Baader TZ4 Telecentric lens system 4x

289,92 EUR
excl. VAT
excl. 4,65 € Shipping costs

Baader TZ4 Telecentric lens system 4x
... optimized for the use in H-alpha filter systems. No field curvature

Baader 4x 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.

General characteristics:
-- Telescope side connection: 2" and T2
-- Camera side connection: T2 thread
-- Aplanatic design with 4x extension of the focal length - free of field curvature
-- Designed for the H-alpha wavelength with 99% Strehl @ 656.3 nm - no other telecentric system offers this performance.
-- 200 mm working distance from the last lens allow the use of nearly any accessory

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.

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