Hutech LPS-C1 broadband nebula filter M48x0.75 mounted - Made in Japan

Hutech IDAS SJ-LPSC1-48 Light Pollution Suppression Filter - 48 mm Filter Thread

IDAS LPS filters have been specially developed for astrophotography. On the one hand, they eliminate the stray light caused by white LED lighting and still retain the natural color. This is exactly what distinguishes these filters from almost all UHC filters in the field of astrophotography. UHC filters are optimized for visual use and cause a colouring of the sky background during photography. Pure stray light filters, on the other hand, are often not effective enough.

Main features of the IDAS SJ-LPSC1-48 nebula filter:

Specially developed for photography with current single-shot color astro cameras - the color balance was designed accordingly

Also very well suited for other color cameras (CCD/CMOS and DSLR).

Can also be used very well for luminance images with monochrome cameras

High-quality anti-reflection coating

Particularly scratch-resistant hard coating

Absorption of scattered LED light

Optical notch filter: The areas between the interfering lines are largely transmitted, in contrast to deep-sky filters, for example. This results in less light loss.

Made in Japan

Exposure time extension - factor 3:

The IDAS LPS allows an exposure time extension by a factor of 3 due to the specific blocking of the disturbing mercury lines and the area around the sodium D-lines. However, the important lines in the deep sky area (e.g. H-alpha and O-III) are transmitted to more than 95%.

Put simply, you can expose three times as long until the sky background comes through, but the object will appear much stronger and more contrasty against the background than without the filter.

Suitable objects:

Not only diffuse nebulae and planetary nebulae can be successfully increased in contrast with the IDAS nebula filter, the balanced color behavior also allows images of star clusters and galaxies and especially comets. This can produce images that are more reminiscent of a dark country sky, even from the vicinity of cities.