Astronomik UHC-E M77
The Astronomik UHC-E filter is tailored for deep-sky photography of emission nebulae and comets under light-polluted skies. It enhances the contrast between these celestial objects and the sky background by blocking typical streetlight emissions, as well as all lines of natural airglow.
With a Full-Width-Half Maximum (FWHM) of 45nm, the Astronomik UHC-E filter ensures a significant contrast boost while allowing a greater amount of starlight to pass through compared to its counterpart, the Astronomik UHC filter. Additionally, its transmission range includes spectral lines, enhancing the photography of comets.
In essence, the Astronomik UHC-E filter is a versatile tool for enhancing contrast under urban sky conditions, particularly useful for photographers looking to capture deep-sky objects and comets.
Other uses
The 1.25" and 2" socket models can be used for observations from light-polluted areas.
Alternatives
- The Astronomik UHC filter is better suited for photographing emission nebulae with strong light pollution.
- The Astronomik CLS and CLS CCD filters can be used for photographing all deep-sky objects with less light pollution. The Astronomik CLS CCD filter has an additional integrated infrared(IR)-blocking layer.
Suitability of the Astronomik UHC-E filters
- CMOS and CCD photography: Good, requires an additional Astronomik IR-Block filter
- DSLR photography (original): Good, color balance is shifted but contrast is enhanced
- DSLR photography (astro-modified): Very good, color balance is also good
- DSLR photography (MC-modified): Very good, requires an additional Astronomik IR-Block filter
Technical data
- Typical transmission of 94% at 486nm (H-beta)
- Typical transmission of 95% at 496nm (OIII)
- Typical transmission of 95% at 501nm (OIII)
- Typical transmission of 94% at 656nm (H-alpha)
- Transmission range: 465nm to 530nm and above 645nm
- Full-Width-Half Maximum (FWHM): 45nm
- Glass thickness: 1mm (except Astronomik OWB Type 3 and XT filters)
- Finely polished optical glass, free of any striae, residual stresses, and bubbles
- Extremely scratch-resistant and durable coating
- Completely resistant against high humidity and aging effects
- Astronomik MFR coating (Astronomik Deep-Sky RGB, UV-IR Block L-1, L-2, L-3, and Narrowband-Emissionline filters)
- Parfocal with other Astronomik filters
- Diffraction-limited
- Optimized spectral windows
- Delivered in a high-quality, long-lasting filter box
Due to the high-precision machining of the carrier substrate, all Astronomik filters are parfocal with wedge errors far below all common tolerances. Astronomik filters are diffraction-limited, ensuring that the optical performance (resolution and contrast) of your telescope is not compromised. Issues concerning focal distances and the exact alignment of images from each color channel are therefore effectively eliminated.
All Astronomik filters are ideal for modern cameras, including both CMOS- and CCD-based models, ensuring you capture the best possible images with your equipment. Sharpness, contrast, and the absence of any reflections and halos are guaranteed. Even with bright stars in the field of view, nebulae and galaxies will be captured with the finest structures. The Astronomik MFR coating is designed for optimal performance across a wide range of focal ratios of the optics used.
Every Astronomik filter undergoes a rigorous quality control process before delivery. Additionally, each Astronomik Narrowband-Emissionline filter is measured using a high-end PerkinElmer Spectrophotometer to ensure it meets the specifications published on our website. On the back of each Narrowband-Emissionline filter box, you will find a label detailing the precise spectral data for that specific filter, including the maximum transmission and the recommended range of focal ratios.
| Artikelnummer: | 10249086 |
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| Lagerbestand: | 0 |
| Hersteller: | Astronomik |