EXPLORE SCIENTIFIC 2" H-Alpha Nebula Filter 12nm
The EXPLORE SCIENTIFIC H-Alpha filter allows photography of red glowing emission nebulae; ideal for use near cities, in slightly light-polluted skies.
- High-quality EXPLORE SCIENTIFIC H-Alpha filter
- Only lets the emission lines of hydrogen pass
- Absorbs all other emission lines and almost all artificial light
- Ideal for use near the city, with slightly lightened skies
- Band pass width: 12 nm
- Better contrast and more details achievable for urban astrophotographers
- Blocks almost all light from mercury and sodium vapor lamps
- Many of the red glowing emission nebulae are only visible in full expansion on photos taken with this filter
- In spite of the existing light pollution amazingly good image results are possible
- Individual test certificate included to guarantee you receive a premium filter
Product number:
0310130
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FAQ - Frequently Asked Questions
That is normal. Finder scopes are only used to make objects easy to locate. The image orientation does not matter for observation.
- Alt-azimuth: easy to use, moves horizontally and vertically
- Equatorial: enables precise tracking of objects with only one axis – ideal for high magnifications and astrophotography
- Moon: from 30 mm
- Planets: from 100 mm
- Deep sky: from 150 mm
Product information "EXPLORE SCIENTIFIC 2" H-Alpha Nebula Filter 12nm"
Apart from air turbulence, the brightening of the night sky is the greatest
barrier to observing faint objects beyond the solar system. Due to
streetlamps and other artificial lighting, the sky in urban areas is no
longer properly black. As a result, the contrast and thus the
perception of deep-sky objects also suffer. However, depending on the
type of celestial object, it is possible to filter out some of the interfering light making it easier to photograph the objects.
The EXPLORE SCIENTIFIC H-Alpha filter uses the characteristic of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines. The emission lines are associated with certain chemical elements - in this case the red glowing hydrogen. This filter blocks all other colors (and therefore almost all artificial light) and lets only the emission lines of hydrogen through. Especially the interfering light of mercury and sodium vapor lamps is effectively blocked. The effect is amazing: suddenly, nebulae become visible on photos in locations which appear completely empty without the filter.
The EXPLORE SCIENTIFIC H-Alpha Nebula filter has been developed exclusively for astrophotography. Especially in slightly light-polluted skies many emission nebulae only become visible and are shown in full expanse on astrophotos when using this filter. The H-Alpha nebula filters make astrophotography near the city possible and the use leads to amazingly good image results despite the existing light pollution. A must for every urban astrophotographer.
The EXPLORE SCIENTIFIC nebula filters are delivered with an individual test report - so you can be sure to get high quality filters.
FEATURES
SCOPE OF DELIVERY
The EXPLORE SCIENTIFIC H-Alpha filter uses the characteristic of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines. The emission lines are associated with certain chemical elements - in this case the red glowing hydrogen. This filter blocks all other colors (and therefore almost all artificial light) and lets only the emission lines of hydrogen through. Especially the interfering light of mercury and sodium vapor lamps is effectively blocked. The effect is amazing: suddenly, nebulae become visible on photos in locations which appear completely empty without the filter.
The EXPLORE SCIENTIFIC H-Alpha Nebula filter has been developed exclusively for astrophotography. Especially in slightly light-polluted skies many emission nebulae only become visible and are shown in full expanse on astrophotos when using this filter. The H-Alpha nebula filters make astrophotography near the city possible and the use leads to amazingly good image results despite the existing light pollution. A must for every urban astrophotographer.
The EXPLORE SCIENTIFIC nebula filters are delivered with an individual test report - so you can be sure to get high quality filters.
FEATURES
- H-Alpha filters are used for astrophotography exclusively
- Allows photography of emission nebulae that glow in the light of red hydrogen
- Many of these emission nebulae are only visible in their full expansion in the photos taken with this filter
- Blocks almost all artificial light, especially from mercury and sodium vapor lamps
- Only allows the emission line of red hydrogen to pass through
- Transmission bandwidth: 12 nm
- Allows more contrast and detail for all urban astrophotographers
- Ideal for use near cities, in slightly brightened skies
- Individual test certificate included to guarantee you receive a premium filter
SCOPE OF DELIVERY
- 1x 2'' H-Alpha Nebula Filter
| Batteries required: | false |
|---|---|
| Colour: | black |
| Extended warranty (years): | 10 |
| Eyepiece Barrel Diameter (mm): | 50.8 |
| Field of application [Telescope-filter]: | Light Pollution Filter for Astrophotography |
| Filter thread size (mm): | 50.8 |
| Material: | Glass, Plastic |
| Net weight (without access.) (g): | 15 |
| Telescope filter type: | Nebula Filter |
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EXPLORE SCIENTIFIC Dark-Sky Filter 77mm Slim
€155.00*
Universal Dark-Sky Filter with 77mm thread for photo lens. Contrast enhancing filter for Aurora- and Deep-Sky imaging.
Especially during Aurora imaging the most important wavelength of 550nm (green) and 630nm (red) this filter let pass by 90%.
In comparrision to CLS filters, the Explore Scientific Dark-Sky Filter is blocking also the yellow Sodium (Na) wave at 590nm which elliminates Sodium-lamp street illumination from your picture.
This is very useful because the yellow light is always a partially mix of green and red light. Removing the yellow wave-length with any image processing software will always damping also the green and red coloring. For Aurory imaging this is of course not wanted.
At these days of increasing light pollution, the Explore Scientific Dark-Sky Filter is absolutely recommended in order to take pictures also from urban conditions.
Finally the slim housing design enables its use also with wide-field photo lens and doesn´t cause any vignetting.
Pictures at night taken by Bernd Pröschold - www.sternstunden.netTest report: http://www.sternstunden.net/filter-testing.html
FEATURES
Deep Sky Filter
Contrast enhancer for Aurora- and Deep-Sky imaging
Wide field imaging of the milky-way, time lapse and landscape
Lightpollution damping filter
Ellimintates the yellow light which can´t be done by any imaging processing software
Black anodized filter housing
77mm filter thgread for foto lens
flat design of only 4mm height (slim) - no vignetting
Ideal also for wide field foto lens
Made from optical glass with Neodymoxid
SCOPE OF DELIVERY
Deep Sky Filter 77mm
Dust protection case