EXPLORE SCIENTIFIC 2" H-Alpha Nebula Filter 7nm

The EXPLORE SCIENTIFIC H-Alpha filter allows photography of red glowing emission nebulae; narrow band version with 7 nm to increase contrast even in difficult urban conditions.

  • 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 heavy lightened skies
  • Band pass width: 7 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 these filters
  • In spite of the existing light pollution amazingly good image results are possible
  • Individual test certificate included to guarantee you receive a premium filter

€115.00*

% €229.00* (49.78% saved)
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Product number: 0310140
GTIN/EAN: 4007922072746
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With BRESSER, you can enjoy a smooth introduction to the vast world of astronomy. Our detailed information ("Telescope Guide") provides valuable tips for beginners—but even experienced astronomers can use the information we provide (e.g., tables for the geographical latitude of all major world cities) as a reference.

Here is the table of contents of the comprehensive BRESSER Telescope Guide:

Sky Guides von Bresser

Der Sky Guide bietet umfassende Informationen zu Sternbildern, Planetenpositionen und astronomischen Ereignissen – ideal, um Ihre Beobachtungen zu planen und noch tiefer in die Astronomie einzutauchen. 
Besuchen Sie den Guide direkt hier, um das Beste aus Ihren Beobachtungen herauszuholen!
Product information "EXPLORE SCIENTIFIC 2" H-Alpha Nebula Filter 7nm"
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 heavy 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.

This filter's narrow passband of only 7 nm bandwidth works out the faint emission nebulae or makes them visible even under difficult urban conditions.


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 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
  • Narrow band version for difficult urban conditions
  • Transmission bandwidth: 7 nm
  • Allows more contrast and detail for all urban astrophotographers
  • Ideal for use near cities, in heavy brightened skies
  • Individual test certificate included to guarantee you receive a premium filter

SCOPE OF DELIVERY

  • 1x 2'' H-Alpha Nebula Filter
Colour: black
Field of application [Telescope-filter]: Light Pollution Filter for Astrophotography
Material: Glass, Plastic
Telescope filter type: Nebula filter

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If you like, simply switch off the automatic settings and gradually dare to adjust the individual professional settings. The new EXPLORE SCIENTIFIC DEEP SKY camera has a highly sensitive and very low-noise SONY Exmor IMX428 CMOS sensor which is additionally cooled down to 40°C below ambient temperature by the two-stage thermoelectric cooling. In contrast to normal DSLR cameras, this guarantees much lower noise and fewer hot pixels in your shots. The images are not only much sharper and more brilliant, but also contain more usable image information. Through the controlled setting of the desired camera temperature, the creation of dark frames under reproducible shooting conditions is possible at any time. The large-format CMOS sensor with 17,6mm diagonal also allows large image fields and simplifies the adjustment and centering of objects considerably. The camera has a built-in USB hub with 2 x USB2.0 ports at the rear. Connect your additional autoguider camera or motor focus etc. via a short USB cable and reduce the risk of cable spaghetti and cable breaks. Separate cable connections between your accessories and your computer are no longer necessary. A sturdy hard case for the camera plus accessories is also included. IMPORTANT NOTES: Don't get confused by the megapixel data and the contrary price structure. In the field of astronomy, the key criterion is not the sensor resolution but the maximum light sensitivity. The main goal is to capture as much light as possible in a short time.DOWNLOAD latest camera software and drivers see download folder "Manuals" or here: http://www.touptek.com/download/showdownload.php?lang=en&id=2 Sample photos made by Lóránd Fényes in Hungary: https://fenyeslorand.hu/asztrofotok/Field of view for different focal lengths in arc minutes and degrees: 400 mm - 124´x 85´ (2.1 x 1.4 degrees) 500 mm - 99´x 68´ (1,7 x 1.1 degrees) 600 mm - 82´x 56´ (1.4 x 0.9 degrees) 700 mm - 70´x 49´ (1.2 x 0.8 degrees) 800 mm - 62´x 43´ (1.0 x 0.7 degrees) 900 mm - 55´x 38´ (0,9 x 0.6 degrees) 1000 mm - 49´x 34´ (0.8 x 0.6 degrees) 1250 mm - 40´x 27´ (0.7 x 0.5 degrees)1500 mm - 55´x 23´ (0.6 x 0.4 degrees) 1750 mm - 28´x 19´ (0.5 x 0.3 degrees) 2000 mm - 25´x 17´ (0.4 x 0.3 degrees) FEATUREScamera type: ASTRO Camera  7.1MP ATR3CMOS07100KPA data output: single pictures and video image Sensor: SONY Exmor IMX428 CMOS Color Sensor resolution: 3200x2200 binning: 1x1 / 2x2 frame rate per second (FBS): 51 / 133 physical sensor size in pixels: 3200 x 2200 / 1600 x 1100megapixel: 7.1 MP sensor size: 14.4 x 9.9 mm (1.1 inch) pixel size: 4.5 µm x 4.5 µm bit depth: 12 Bit backfocus: 17,5 mm  shutter Type: global shutterinternal camera memory: DDR 3 RAMthermoelectric cooling with fan: yes, up to 40°C below ambient temperature adjustable exposure times: 150µs to 60min operating temperature: -10 to +50°C (30-80% RLH) cable length USB 3.0: 150cm DC cable length power supply: 200cm CNC machined aluminium housing camera diameter: 80mm; length: 102mm camera weight: 0,53 kg camera connection diameter: 2.0 inch ( 50.8mm) camera connection thread: T2 (M42x0,75mm) filter thread: Yes, 2.0 inch in receptacle camera connection to PC: USB 3.0 built-in USB hub with 2 x USB 2.0 ports power supply: Power supply 12 Volt 3,0 Ampere included software: EXPLORE Capture included camera driver and ASCOM driver includedoperating system: WINDOWS 10 + 11PC requirements: CPU Intel Core2 2.8Ghz or higher / 2 GB Ram / USB 3.0 SCOPE OF DELIVERYDEEP SKY ASTRO Camera 7.1MP telescope adapter T2 thread to 2.0'' (50,8mm) USB 3.0 connection cable 150cm power supply 230V/12V3,0A dust cap software CD hard case instruction manual

€1,395.00* €2,390.00* (41.63% saved)