Hutech/IDAS RS (Reflection Suppression) technology filters are
specifically designed to address the problem of internal reflections
common in filtered CCD images when bright stars are present in the
field of view (This problem is especially common in wide-field
images). The IDAS RS filter set
reduces surface reflections to less than 4% of conventional
dichroic filters such as the IDAS Type II LRGB set as can be seen
in the simulation examples below, and clearly demonstrated in the shots at right
(click on the photos to see enlarged views) provided by Jim Windlinger and Alan Smallbone.
A direct comparison of shots taken with the IDAS RS filters vs. conventional interference filters also clearly illustrate the beneficial effects of the RS filters..
In addition to the suppression of reflections, the IDAS RS filters feature
gentle, overlapping bandpasses which match the response of the human eye more closely,
making color balancing for realistic color simpler.
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RS technology filter set simulation (Finger Lakes camera / no cover glass).
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Conventional filter set (IDAS Type II LRGB) simulation (Finger Lakes camera / no cover glass).
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The complete set includes 4 filters - luminance(L) and RGB components. All
filters utilize the IDAS IGAD and UFP filter technology.
The filter sets are available as unmounted 50mm filters and
unmounted 31mm filters (for
the QSI 500 Series CCD cameras).
Mechanical Specifications:
| Filters: |
L, Red |
Green, Blue |
Mechanical
Thickness |
4mm |
5mm |
Glass
Thickness |
4mm |
4mm |
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