IDAS H-a Enhancement Filter with UV/IR Cut - 2" Mounted
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The HEUIB-II is a UV/IR-cut filter enhanced for shooting H-alpha nebulae at wave length of 656.3nm. This filter should NEVER be used for solar observation.
This will reduce the interference from the red end spectrum associated with regular astronomical IR-cut filters such as UIBAR-III, and as a result enhance the wave length of H-alpha nebulae. Even in comparison with our conventional HEUIB filter, HEUIB-II has less interference from the red end spectrum as a result of the increase in the red spectrum suppression range. Thus, the image of nebulae at the H-alpha region will get enhanced.
The HEUIB-II filter utilizes the IGAD (ion-Gun AssistDeposition) coating technology which has been applied to our regular LPS-P2 and LPS-V4 series. The IGAD technology densifies the multi-layers - the heart of interference filters - resulting in the physical properties that cannot be obtained from the conventional multi-layers.
- Highly durable thin layers of which hardness equals to quartz glasses. Tremendously improved adherence between the substrate and the multi-layers set.
- Absolutely almost no aging variation in optical spectral characteristics due to temperature and humidity change as far as used in the regular human living environments.
*This product is an interference filter. Its spectrum characteristics will be subject to the incidence of incoming light. Please carefully read the following instruction for proper use:
When the HEUIB-II is placed before the lens:
Use a lens having the light incidence angle of 17 degrees or lower (field angle of 34 degrees or lower).
Specifications:
- M48 x 0.75
- Filter thickness: 2mm (Previous version # HEUIB-II-48mmS was 2.5mm thick)
- Lightweight frame
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The HEUIB-II is a UV/IR-cut filter enhanced for shooting H-alpha nebulae at wave length of 656.3nm. This filter should NEVER be used for solar observation.
This will reduce the interference from the red end spectrum associated with regular astronomical IR-cut filters such as UIBAR-III, and as a result enhance the wave length of H-alpha nebulae. Even in comparison with our conventional HEUIB filter, HEUIB-II has less interference from the red end spectrum as a result of the increase in the red spectrum suppression range. Thus, the image of nebulae at the H-alpha region will get enhanced.
The HEUIB-II filter utilizes the IGAD (ion-Gun AssistDeposition) coating technology which has been applied to our regular LPS-P2 and LPS-V4 series. The IGAD technology densifies the multi-layers - the heart of interference filters - resulting in the physical properties that cannot be obtained from the conventional multi-layers.
- Highly durable thin layers of which hardness equals to quartz glasses. Tremendously improved adherence between the substrate and the multi-layers set.
- Absolutely almost no aging variation in optical spectral characteristics due to temperature and humidity change as far as used in the regular human living environments.
*This product is an interference filter. Its spectrum characteristics will be subject to the incidence of incoming light. Please carefully read the following instruction for proper use:
When the HEUIB-II is placed before the lens:
Use a lens having the light incidence angle of 17 degrees or lower (field angle of 34 degrees or lower).
Specifications:
- M48 x 0.75
- Filter thickness: 2mm (Previous version # HEUIB-II-48mmS was 2.5mm thick)
- Lightweight frame
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
IDAS H-a Enhancement Filter with UV/IR Cut - 2" Mounted # HEUIB-II-48ST2