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 the photos in locations which appear completely empty without the filter.The EXPLORE SCIENTIFIC H-Alpha Nebula Filter has been developed for astrophotography exclusively. 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.FEATURESH-Alpha filters are used for astrophotography exclusivelyAllows photography of emission nebulae that glow in the light of red hydrogenMany of these emission nebulae are only visible in their full expansion in photos taken with this filterBlocks almost all artificial light, especially from mercury and sodium vapor lampsOnly allows the emission line of red hydrogen to pass throughTransmission bandwidth: 12 nmAllows more contrast and detail for all urban astrophotographersIdeal for use near cities, in slightly brightened skiesIndividual test certificate included to guarantee you receive a premium filterSCOPE OF DELIVERY1x 1.25'' H-Alpha Nebula Filter 

Discover the possibilities and forge new paths with the Nebula EXOS-2 Goto Mount!Mount and TripodThe BRESSER EXOS-2 is a stable mount with a high load capacity and precise tracking for visual observations and astrophotography. Double radial groove ball bearings in both axes ensure precise, smooth motion, and the RA axis bearing has been optimized to reduce backlash. Additionally, the tripod is reinforced to further suppress vibrations. The BRESSER EXOS-2 can be loaded with up to 13 kg of optics for purely visual use depending on the length and purpose!Nebula: the powerful and flexible Goto systemWith the new Nebula Goto system, set off for new astronomical shores. This system offers several control options. You can operate the mount directly via its own Nebula control interface using your smartphone or tablet (iOS and Android supported). Alternatively, you can also use a planetarium software such as SkySafari. Manual control remains an option as well. For this, a hand box for minor corrections or simple control commands is included.Furthermore, with the BRESSER Nebula Goto Kit, you can connect your laptop or PC directly via WIFI or LAN cable (recommended for faster data transfer) to the Nebula control unit. This not only gives you full control over the mount but also allows you to connect various devices such as cameras, motor focus, filter wheels, etc. directly to the control unit via various USB ports. This eliminates the need to connect each device to your computer via cables. The pre-installed program KStars / EKOS lets you comfortably control all devices from your PC or laptop. Electronic polar alignment or guiding can also be easily achieved with the Goto Kit, provided you have a camera connected. You are also not limited to the software of the Nebula control unit. Thanks to the installed ASCOM Alpaca driver, you can use your own programs on your computer to control the mount - whether it's Stellarium or N.I.N.A. The two stepper motors with a belt drive ensure a smooth, direct drive of the two axes. It's only important to have a good balance. FEATURES EXOS-2 MOUNT Stable parallactic mount with fine drive in both axes Ball bearings in both axes for more precise movements Sturdy height-adjustable stainless steel tripod (Min. 69 cm / Max. 109.5 cm) Load capacity of up to 13 kg Spirit level for easy horizontal alignment Polar height scale for setting the latitude Polar scope with optional lighting (item no. 4964212) Tripod weight: 4.7 kg Mount weight: 5.6 kg (without counterweight) Total weight including counterweight: 14.8 kg Batteries: not included FEATURES GOTO SYSTEM Belt drive for a more precise, quieter tracking Stepper motors with high resolution (0.36´/microstep) Hand control box for direct control of the mount Virtual hand control box for smartphones and tablets PC control – ASCOM compatible USB ports for cameras, motors, filter wheels etc. SCOPE OF DELIVERY BRESSER EXOS-2 Mount Polar finder scope with optional illumination Stainless steel field tripod with accessory tray 1x 4.5-kg counterweight 2 stepper motors for the axes (RA and DEC) Raspberry Pi control unitBasic handbox 230V / 12V / 3 A power adapterConnection cableManual for download

L-eNhance Filter for deep sky nebula photography from the cityThe relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel. Especially with inexpensive newtonian telescopes, double-lens ED refractors or even achromats, the L-eNhance filters open up completely new possibilities for the capture of high-class astronomical images even out of the light polluted city. CMOS cameras can deliver images like monochrome cameras. This new generation of filters makes it possible to take amazing astrophotos directly from the light-polluted city with all its artificial light sources. The narrow bandpass for the wavelengths of O-III, H-Beta and H-Alpha and the almost complete attenuation of the interfering light sources of these new filters make this an ideal solution. L-eNhance Description  L-eNhance provides an economical and practical solution for amateurs. It is a tri-band pass filter which has been designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. The convenience and cost-effectiveness of this filter allows amateurs to take a rich selection of astronomical images, even in bright, heavily light-polluted areas. We believe the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.  Main Use and PerformanceThis new generation of filters makes it possible to take amazing astrophotos directly from the light-polluted city with all its artificial light sources. The narrow bandpass for the wavelengths of O-III, H-Beta and H-Alpha and the almost complete attenuation of the interfering light sources do not require very large or extremely expensive telescopes. No, especially with inexpensive newtonian telescopes, double-lens ED refractors or even achromats, these filters open up completely new possibilities for high-class astronomical images. Furthermore, with the help of these filters, CMOS colour cameras can deliver an image quality that comes close to CCD monochrome cameras. WARNING: These nebula filters are not designed for sun observation. DO NOT LOOK AT THE SUN WITH THIS FILTER. You will go BLIND if you ignore this warning. Coating technology L-eNhance has a multiple anti-reflective coating on the optical substrate. The L-eNhance filter uses a precision coating based on ion deposition coating technology. This ensures durability and scratch resistance as well as stability on the CWL (central wavelength), which is not affected by temperature changes. Absolute precision and homogeneity of the coatings as well as maximum values for transmission in the passband and optical density in the off-band range are guaranteed for all filters. FEATURES Professional photographic filter for astronomy Improves deep sky emission nebula photography Best choice for enhanced light pollution suppression For taking pictures also from highly light-polluted areas Tri-band filter with high transmission for O-III, H-Beta and H-Alpha linesDoes not require very large or extremely expensive telescopesExcellent results also with inexpensive newtonian telescopes, double-lens ED refractors or even achromatsCMOS colour cameras can deliver an image quality that comes close to CCD monochrome cameras Balanced colour for a natural image Filter diameter: 2,0 inches / 50,8 mm Connecting thread: M48x0.75mmSelected optical glass material Spectrum: 300-1000nm Off-Band Blocking: > 99% Surface Quality: 60/40 (Refer to MIL-O-13830) Fine-optically polished to ensure accurate 1/4 wavefront and highest parallelism over the both surfacesHigh transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm&500nm and H-beta 486nm). SCOPE OF DELIVERY L-eNhance filter (1pc) Dust protection box (1pc)

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar system enormously. Depending on the type of celestial object, it is possible to increase the contrast dramatically by blocking the interfering artificial light. The EXPLORE SCIENTIFIC S-II filter uses the property 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 ionized sulfur. The EXPLORE SCIENTIFIC S-II nebula filter blocks all other colors (and thus almost all artificial light) and lets only the emission lines of ionized sulfur at 672 nm through. The effect is amazing: suddenly, nebulae become visible in places that appear completely empty without the filter. In slightly brightened skies many planetary nebulae, emission nebulae and supernova remnants can be seen without any difficulties when using this filter. A must for every visual observer and for astrophotography. EXPLORE SCIENTIFIC nebula filters come with an individual test report - so you can be sure to get high quality filters. FEATURES Simplifies the observation of planetary nebulae, emission nebulae and supernova remnants Blocks almost all artificial light Lets only the emission lines of ionized sulfur at 672 nm pass Transmission bandwidth: 12 nm Allows for more contrast in faint deep sky objects Ideal for use near cities, in slightly brightened skies Individual test certificate included to guarantee you receive a premium filter SCOPE OF DELIVERY 1x 1.25'' S-II nebula filter