Telecentric TZ-4 2"

Name: Baader Telecentric TZ-4 2"
Brand: Baader
Price: 443 USD

$ 443.00 incl. VAT plus shipping costs

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2" plug connection and T2 thread on both sides
Aplanatic without image field curvature, 4x focal length extension
Specially calculated for H-alpha with 99% Strehl ratio

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Product description

with 2" connector and T2 thread at both ends
aplanatic, with either 2X or 4X focal length extension and free of field curvature
specially designed and produced for the H-alpha wavelength, with 0.99 Strehl ratio (99% relative intensity at 656.3nm). No other telecentric lens system achieves such a high imaging performance

Telecentric systems are mainly used in H-alpha filters for solar observation, in which the 1/100 lambda plane-parallel Etalon in the H-alpha filter requires a perfectly parallelised beam path across the entire image.