IDAS DTD Dusk to Dawn H-a, OIII & NIR Filter - ZWO 42mm and 54mm (Gen 2) Filter Drawer Mount
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About IDAS DZ Filters:
The IDAS DZ framed filters are mounted in a 3d printed holder and designed to be inserted directly into the following ZWO filter drawers:
- ZWO FD-M54-II (M54 Filter Drawer Gen / Type II)
- ZWO FD-M42-II (M42 Filter Drawer Gen / Type II)
The clear aperture of the 2" version of this IDAS filter is 43mm. You can certainly use that with ZWO's filter holder in the above filter drawers. However, these 3d cell-mounted DZ filters have a larger clear aperture of 47mm, reducing the chances of vignetting when used with full frame cameras. All DZ filters have a glass subtrate that is 2mm thick.
IDAS Dust-to-Dawn Filter:
A new generation filter covering multiple objects including comets, galaxies, the Milky Way, and emission and reflection nebulae, by making use of the extra tranmission in the NIR region.
The IDAS DTD filter not only passes through the Ha and OIII regions in the same manner as of the IDAS NBZ, but also provides a pass band for comet ion tails in the visible spectrum range (400nm to 700nm, susceptible to light pollutions). This filter furthermore enhances the contrast of the continuous spectrum lights from comet dust tails, galaxies and the Milky Way by making use of the NIR region that is hardly interferenced by light pollutions. The DTD filter makes it possible to shoot more objects in the visible to NIR spectrum range at higher contrasts.
n.b. on halos
Optical filters such as IDAS GNB and DTD utilizing infrared tend to cause haloing in the NUV and NIR regions. This is because the anti-reflection properties of off-the-shelf cameras' optical systems (optical window and sensor cover glass) are optimized for the visible spectrum only, not for the NIR region. Thus, haoling at the camera end in the unoptimized region becomes more apparent, coupled with haloing from the filter itself.
Here is a rough estimation of the magnitude of haloing where the haloing maginute of NBZ (NBZex) is counted as 1:
- DTD + IMX294 sensor results in 7.9 times
- DTD + IMX585 sensor results in 23.7 times
Other Information
- Country of Manufacture: Japan
About IDAS DZ Filters:
The IDAS DZ framed filters are mounted in a 3d printed holder and designed to be inserted directly into the following ZWO filter drawers:
- ZWO FD-M54-II (M54 Filter Drawer Gen / Type II)
- ZWO FD-M42-II (M42 Filter Drawer Gen / Type II)
The clear aperture of the 2" version of this IDAS filter is 43mm. You can certainly use that with ZWO's filter holder in the above filter drawers. However, these 3d cell-mounted DZ filters have a larger clear aperture of 47mm, reducing the chances of vignetting when used with full frame cameras. All DZ filters have a glass subtrate that is 2mm thick.
IDAS Dust-to-Dawn Filter:
A new generation filter covering multiple objects including comets, galaxies, the Milky Way, and emission and reflection nebulae, by making use of the extra tranmission in the NIR region.
The IDAS DTD filter not only passes through the Ha and OIII regions in the same manner as of the IDAS NBZ, but also provides a pass band for comet ion tails in the visible spectrum range (400nm to 700nm, susceptible to light pollutions). This filter furthermore enhances the contrast of the continuous spectrum lights from comet dust tails, galaxies and the Milky Way by making use of the NIR region that is hardly interferenced by light pollutions. The DTD filter makes it possible to shoot more objects in the visible to NIR spectrum range at higher contrasts.
n.b. on halos
Optical filters such as IDAS GNB and DTD utilizing infrared tend to cause haloing in the NUV and NIR regions. This is because the anti-reflection properties of off-the-shelf cameras' optical systems (optical window and sensor cover glass) are optimized for the visible spectrum only, not for the NIR region. Thus, haoling at the camera end in the unoptimized region becomes more apparent, coupled with haloing from the filter itself.
Here is a rough estimation of the magnitude of haloing where the haloing maginute of NBZ (NBZex) is counted as 1:
- DTD + IMX294 sensor results in 7.9 times
- DTD + IMX585 sensor results in 23.7 times
About IDAS DZ Filters:
The IDAS DZ framed filters are mounted in a 3d printed holder and designed to be inserted directly into the following ZWO filter drawers:
- ZWO FD-M54-II (M54 Filter Drawer Gen / Type II)
- ZWO FD-M42-II (M42 Filter Drawer Gen / Type II)
The clear aperture of the 2" version of this IDAS filter is 43mm. You can certainly use that with ZWO's filter holder in the above filter drawers. However, these 3d cell-mounted DZ filters have a larger clear aperture of 47mm, reducing the chances of vignetting when used with full frame cameras. All DZ filters have a glass subtrate that is 2mm thick.
IDAS Dust-to-Dawn Filter:
A new generation filter covering multiple objects including comets, galaxies, the Milky Way, and emission and reflection nebulae, by making use of the extra tranmission in the NIR region.
The IDAS DTD filter not only passes through the Ha and OIII regions in the same manner as of the IDAS NBZ, but also provides a pass band for comet ion tails in the visible spectrum range (400nm to 700nm, susceptible to light pollutions). This filter furthermore enhances the contrast of the continuous spectrum lights from comet dust tails, galaxies and the Milky Way by making use of the NIR region that is hardly interferenced by light pollutions. The DTD filter makes it possible to shoot more objects in the visible to NIR spectrum range at higher contrasts.
n.b. on halos
Optical filters such as IDAS GNB and DTD utilizing infrared tend to cause haloing in the NUV and NIR regions. This is because the anti-reflection properties of off-the-shelf cameras' optical systems (optical window and sensor cover glass) are optimized for the visible spectrum only, not for the NIR region. Thus, haoling at the camera end in the unoptimized region becomes more apparent, coupled with haloing from the filter itself.
Here is a rough estimation of the magnitude of haloing where the haloing maginute of NBZ (NBZex) is counted as 1:
- DTD + IMX294 sensor results in 7.9 times
- DTD + IMX585 sensor results in 23.7 times
Other Information
- Country of Manufacture: Japan
IDAS DTD Dusk to Dawn H-a, OIII & NIR Filter - ZWO 42mm and 54mm (Gen 2) Filter Drawer Mount