Hutech IDAS H-alpha Enhanced UV/IR Blocking Filter for Nikon Camera D5000

Outstanding optical properties

The IDAS HEUIB-II (H-alpha Enhanced UV IR Blocking) filter is designed for enhanced spectrum DSLRs and one-shot color CCD astronomical cameras.

Besides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, it isolates the common H-alpha line relative to the surrounding extreme red end of the spectrum, making it easy to bring out the faint H-alpha emission nebulosity of astronomical photos, yet retain the background color balance of broadband photos.

IDAS filters are developed for astrophotography

Unlike other astronomical UV-IR blocking camera filters, IDAS filters are specifically designed for balanced color transmission using the IDAS unique Multi-Bandpass Technology (MBT) process. The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars, galaxies and globular clusters, but retains high sensitivity for the important H-alpha emission line.

The original camera filter blocks large part of the red spectral region, including H-alpha, most astronomical UV/IR blocking filters let all red light pass, resulting in reddish appearance.

The HEUIB-II lets light around H-alpha pass and balances this by a reduced transmission from orange to light red. Thus the camera can be used for astrophotography and for daytime photography without any modification in between!

Main characteristics of the IDAS HEUIB-II filter:

Especially designed for DSLR and single-shot CCD colour cameras

High quality anti-reflective coatings

Scratch-proof

Exposure time extension - factor 2:
The IDAS LPS D1 allows a 2x extension of the exposure time. However, 90% of the important lines in the deep-sky range (like H-alpha and [O III]) are transmitted.

Simply said, you can expose twice as long until the sky background brakes through, but the object appears clearly stronger and with more contrast than without filter.

Objects:
Not only the contrast of H II regions and plantary nebulae can be sucessfully increased with the IDAS stray light filter, the balanced colour properties allows also photographing of star clusters and galaxies.

Easy to use technical solution

No optical path length needed:

Correctors or flatteners can be used as before. Use many telephoto lenses without focusing complications. Additionally, the sensor chip is protected against dust.

[*This interference light filter is integrated into the housing of the Nikon D5000.]

The filter has a frame that is inserted into the camera body. It is locked in place by the lens or the telescope adapter. It can be removed just as easily.

Astrophotographic results obtained with this filter on Astrobin

Here you can find some astrophotographs made with this filter type: Link to Astrobin

1 Set consisting of

1 Filter

1 Storage case

Astrophotographic results obtained with this filter on Astrobin

Here you can find some astrophotographs made with this filter type: Link to Astrobin