IDAS DTD-DZ broadband nebula filter for deep-sky and comets - for ZWO filter drawers

IDAS DTD broadband nebula filter and comet filter

The IDAS DTD - Dusk to Dawn - nebula filter not only provides transmission in the [O III] and H-alpha range, it also transmits the light of comet ion tails in the spectral range from 400 nm to 700 nm. In addition, this filter also increases the contrast of the continuous light spectrum of comet dust tails, galaxies and the Milky Way by using the NIR range (near infrared), which is hardly disturbed by light pollution. The filter is therefore a universal nebula filter for nearly all deep-sky objects:

Reflection nebulae and emission nebulae

Star clusters

Comets

Galaxies

Our Milky Way

The advantages of DZ frames for filter drawers:
The Idas filters in the DZ frames are specially made for ZWO filter drawers (Gen. II). While classic 2" filters only have a clear aperture of 43 mm, the filter in the DZ frame has an impressive 47 mm clear aperture. This significantly reduces vignetting on cameras with larger sensors and telescopes with higher speed.

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