IDAS NBZ-II 10nm Ha & 8nm OIII Dual Band Filter - ZWO 42mm and 54mm (Gen 2) Filter Drawer Mount
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About IDAS NBZ-II 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 NBZ-II 10nm Ha & 8nm OIII Dual Band Filter:
The IDAS NBZ-II is a new dual band nebula booster filter - the successor to the NBZ (NBZex) filter. The FWHM of the NBZ-II is 8nm (+/=0.4nm) at OIII, and 10nm (+/-0.4nm) at H-alpha respectively. This has the same anti-Haloing characteristics as the NBZ did. A test report of the actually measured optical properties is provided with each individual NBZ-II filter piece shipped.
The transmittance curve of interference filters will naturally shift towards the shorter wave length side against oblique light incidence, and this tendency will be more noticeable as the incidence angle becomes higher as shown in the 3rd photo above.
Some of the competitive 7nm or narrower filters will decrease in transmittance by 50% or more when used in a fast optical system (around f/2), while the NBZ=II retains 80% or more of the transmittance under the same conditions. So this new NBZ-II filter can be used in systems that are as fast as f/1.9.
The shift tendency will be stronger in optical systems that have a central obstruction. Taking this into consideration, we have designed the NBZ-II as you can see from the simulation in the 4th photo above.
Other Information
- Country of Manufacture: Japan
About IDAS NBZ-II 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 NBZ-II 10nm Ha & 8nm OIII Dual Band Filter:
The IDAS NBZ-II is a new dual band nebula booster filter - the successor to the NBZ (NBZex) filter. The FWHM of the NBZ-II is 8nm (+/=0.4nm) at OIII, and 10nm (+/-0.4nm) at H-alpha respectively. This has the same anti-Haloing characteristics as the NBZ did. A test report of the actually measured optical properties is provided with each individual NBZ-II filter piece shipped.
The transmittance curve of interference filters will naturally shift towards the shorter wave length side against oblique light incidence, and this tendency will be more noticeable as the incidence angle becomes higher as shown in the 3rd photo above.
Some of the competitive 7nm or narrower filters will decrease in transmittance by 50% or more when used in a fast optical system (around f/2), while the NBZ=II retains 80% or more of the transmittance under the same conditions. So this new NBZ-II filter can be used in systems that are as fast as f/1.9.
The shift tendency will be stronger in optical systems that have a central obstruction. Taking this into consideration, we have designed the NBZ-II as you can see from the simulation in the 4th photo above.
- NBZ II Filter
- Individual spectrographic test report
About IDAS NBZ-II 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 NBZ-II 10nm Ha & 8nm OIII Dual Band Filter:
The IDAS NBZ-II is a new dual band nebula booster filter - the successor to the NBZ (NBZex) filter. The FWHM of the NBZ-II is 8nm (+/=0.4nm) at OIII, and 10nm (+/-0.4nm) at H-alpha respectively. This has the same anti-Haloing characteristics as the NBZ did. A test report of the actually measured optical properties is provided with each individual NBZ-II filter piece shipped.
The transmittance curve of interference filters will naturally shift towards the shorter wave length side against oblique light incidence, and this tendency will be more noticeable as the incidence angle becomes higher as shown in the 3rd photo above.
Some of the competitive 7nm or narrower filters will decrease in transmittance by 50% or more when used in a fast optical system (around f/2), while the NBZ=II retains 80% or more of the transmittance under the same conditions. So this new NBZ-II filter can be used in systems that are as fast as f/1.9.
The shift tendency will be stronger in optical systems that have a central obstruction. Taking this into consideration, we have designed the NBZ-II as you can see from the simulation in the 4th photo above.
Other Information
- Country of Manufacture: Japan
- NBZ II Filter
- Individual spectrographic test report