Altair Astro

Feature summary Altair 662C CMOS Camera:

• IMX662 Colour CMOS Sensor with on-chip HGC, LCG and HDR Support
• Resolution: 1920 x 1080
• 2.9 um Square Pixels
• 1/2.8-inch Optical Format
• 12-bit ADC
• 512 Mbyte Memory
• G Sensitivity: 5612mv with 1/30s
• Low Noise: 0.46 to 5.35e- 
• High Frame Rate 47 FPS  8 bit
• Binning from 1x1 to 8x8 in either stacking or averaging modes.

Why choose a SkyTech DSLR Clip-Filter?

• It can be inserted or removed in seconds.
• All lens functions (focus, preview screen, image stabilization) work as usual.
• If you have a telescope with short space between reducer/flattener and camera and filter wheel, or a camera lens, a clip filter is the solution.
• It protects your sensor from dust build-up during long exposures when the mirror is up.

Why choose a SkyTech DSLR Clip-Filter?

• It can be inserted or removed in seconds.
• All lens functions (focus, preview screen, image stabilization) work as usual.
• If you have a telescope with short space between reducer/flattener and camera and filter wheel, or a camera lens, a clip filter is the solution.
• It protects your sensor from dust build-up during long exposures when the mirror is up.

• It can be inserted or removed in seconds. All lens functions (focus, preview screen, image stabilization) work as usual.
• If you have a telescope with short space between reducer/flattener and camera and filter wheel, a clip filter is the solution.
• It protects your sensor from dust build-up during long exposures.

Narrowband H-Alpha, O-III and SII nebula filters from Altair for astrophotography with CMOS sensors for high contrast for telescopes with ~f/4.5

• optimized for CMOS sensors (Color and MONO)
• exact and narrow half-widths for optimal signal-to-noise ratio
• Identical filter thicknesses for homofocality
• Blackened edges
• The edge of the filter is sealed to prevent moisture penetration
• SiO2 coating for virtually unlimited lifetime
• Low-profile filter mount - height only 6 mm
• Certificate

Altair DualBand 6nm ULTRA Filter Features:

• Capture two main emission nebulae bands at the same time, per filter, whilst suppressing light pollution, moonlight, and airglow.
• Acquire more data in less time, opening up your imaging window, even into the summer months when it isn't quite dark.
• If you have the 6nm Sii Oiii Ultra filter and the Ha Oiii filter combo, you can capture twice the Oiii data in each imaging session and combine them for true SHO Hubble style imaging with a colour camera!
• Extremely steep bandpass yields maximum contrast in extreme light pollution: 6nm FHWM centred on 500.7nm Oiii wavelength, 5.5nm FHWM centred on the Sii and Ha wavelengths.
• Can be used with One Shot Colour (OSC) CMOS or mono astronomical cameras for luminance data.
• Includes UVIR blocking for both modified and un-modified DSLR cameras, plus an anti-reflection coating for the ultimate in contrast.
• Best performance at focal ratios at F4.8 or slower, however can be used as fast as F3.6, with minimal contrast impact (conservative estimate - faster may be possible). Like any dichroic filter, contrast increases as focal ratio number increases. More info about light pollution filter performance and focal ratio here.
• Available in 1.25" or 2" standard astronomy filter sizes. The filters have standard Astronomy compatible filter threads, and fit inside the Altair Magnetic Filter holders (with appropriate slider), and standard astronomy filter wheels. Choose the 2" version for use with the Altair Canon / Nikon DSLR lens to astro CMOS adaptors. For Hypercam 183C and 533C or 533M, 585C and smaller sensors choose the 1.25" filter. For larger sensors choose the 2" version.

Altair DualBand 4nm Filter Features:

• Capture the two main emission nebulae bands at the same time, whilst suppressing light pollution, moonlight, and airglow.
• More data in less time, opening up your imaging window, even into the summer months when it isn't quite dark yet. Capture twice the Oiii data, whilst obtaining Sii to complement the Altair Ha Oiii DualBand filter.
• Extremely steep bandpass yields maximum contrast in extreme light pollution: 4nm FHWM centred precisely on the target wavelengths.
• Can be used with One Shot Colour (OSC) CMOS or mono astronomical cameras for luminance data.
• Includes UVIR blocking for both modified and un-modified DSLR cameras, plus an anti-reflection coating for halo suppression. To see the AR coating in action, please see images demonstrating the same filter with and without the AR coating on the bright star, Capella in exactly the same conditions with the same settings.
• Best performance at focal ratios as fast as F4.8, with contrast increasing as focal ratio increases. More info about light pollution filter performance and focal ratio here.
• The 2" filter has standard M48x0.75mm thread, and fits inside the Altair Magnetic Filter holders, standard 2" filter wheels, plus the Altair Canon / Nikon DSLR lens to astro CMOS adaptors. 

Altair DualBand 6nm ULTRA Filter Features:

• Capture two main emission nebulae bands at the same time, per filter, whilst suppressing light pollution, moonlight, and airglow.
• Acquire more data in less time, opening up your imaging window, even into the summer months when it isn't quite dark.
• If you have the 6nm Sii Oiii Ultra filter and the Ha Oiii filter combo, you can capture twice the Oiii data in each imaging session and combine them for true SHO Hubble style imaging with a colour camera!
• Extremely steep bandpass yields maximum contrast in extreme light pollution: 6nm FHWM centred on 500.7nm Oiii wavelength, 5.5nm FHWM centred on the Sii and Ha wavelengths.
• Can be used with One Shot Colour (OSC) CMOS or mono astronomical cameras for luminance data.
• Includes UVIR blocking for both modified and un-modified DSLR cameras, plus an anti-reflection coating for the ultimate in contrast.
• Best performance at focal ratios at F4.8 or slower, however can be used as fast as F3.6, with minimal contrast impact (conservative estimate - faster may be possible). Like any dichroic filter, contrast increases as focal ratio number increases. More info about light pollution filter performance and focal ratio here.
• Available in 1.25" or 2" standard astronomy filter sizes. The filters have standard Astronomy compatible filter threads, and fit inside the Altair Magnetic Filter holders (with appropriate slider), and standard astronomy filter wheels. Choose the 2" version for use with the Altair Canon / Nikon DSLR lens to astro CMOS adaptors. For Hypercam 183C and 533C or 533M, 585C and smaller sensors choose the 1.25" filter. For larger sensors choose the 2" version.

This filter was developed to suppress light pollution for colour and monochrome cameras and offers more balanced RGB colours.

• ltair TRI-RGB is great for broadband objects such as mixed emission / reflection nebulae, comets, dust clouds and galaxies, but it also allows the major emission nebulae lines through. It covers both broadband AND narrowband targets.
• TRI-RGB complements the Altair TriBand and DualBand filters by adding star colours.
• TRI-RGB and works with fast or slow focal ratio telescopes and camera lenses. 
• TRI-RGB is not only for light pollution control. It works very well under dark skies too by enhancing colour purity, airglow and reducing channel crossover in colour CMOS and DSLR cameras.
• Although primarily intended for colour cameras, TRI-RGB can be used for a cleaner luminance channel with a mono camera. 
• High transmission peaks with steep sides enhance contrast, together with almost total suppression of unwanted light, at OD4/5 (0.01%~0.001%) over the majority of unwanted visual wavelengths.

Feature summary Altair 664C CMOS Camera:

• IMX664C Colour CMOS Sensor
• On-chip HGC, LCG and HDR Support
• Resolution: 2688 x 1520 (4.1mp)
• 2.9 um Square Pixels
• Diagonal 9.02 mm (Type 1/1.8 Optical Format)
• 12-bit ADC
• 512 Mbyte Memory
• Sensitivity: 2000 m V or more per 1 µm2
• Low Noise: 6.2 – 0.69 e-
• High Frame Rate 97 FPS @ 2688*1520 8bit mode
• Binning from 1x1 to 8x8 in either stacking or averaging modes.

Feature summary Altair 678M CMOS Camera:

• IMX678 Starvis 2 CMOS Sensor
• On-chip HGC and LCG Support
• 3840 x 2160 pixel resolution:
• 2 um Square Pixels
• 1/1.8-inch Optical Format
• 12-bit ADC
• 512mb DDR3 Memory
• G Sensitivity: 3637mv
• Low Noise: 0.42 to 2.43e- 
• Fast Frame Rate 47 FPS in 8bit mode
• Binning from 1x1 to 8x8 in either stacking or averaging modes.

Altair 2 inch Magnetic Filter Holder - M48F - M54M V2

• Enables connection to flatteners and reduers with M48x0.75mm male thread, such as Altair PlanoStar or Starwave, and Altair or other cameras with M54x0.75mm female thread.
• Optical path length is 17mm, therefore you need to incorporate this amount in your spacing calculations.
• The maximum height the filter can protrude from the surface of the slider is 6.85mm. The threads of the filter are buried, therefore this measurement does not include the threads of the filter. There is allowance for maximum filter thread depth of 3.6mm.
• Includes a 2" filter holder/slider. Additional 2" and 1.25" Filter Sliders are available separately.

• Reduces approx. 98% of heat reaching the optics to keep Etalon from drifting off-band and protects your expensive equipment.
• Spectrographic Transmission test report included showing the performance of each individual filter.
• 32-36nm FHWM Bandpass at H-alpha wavelength of 656.28 nm Transmission ~ 95-98% (Tolerance is about 3%).
• 32-36nm FHWM Bandpass with CWL at 395nm covering Calcium H-Line and Calcium K-Line wavelengths. Transmission - 85-90% (Tolerance is about 3%).
• Visible light blocking (area of maximum solar radiation and heat generation): Average OD4 ~0.001%T @400-700nm.
• UVIR average blocking OD5 ~0.001%T between 200-1100nm
• Extra Deep IR Blocking up to 1700nm Average OD2 (1%) (lowest solar radiation).
• Quartz Element Diameter 95mm, Thickness 8mm, Weight 125g
• Multilayer coatings with SiO2 protective overcoat for a long life and easy cleaning.
• ERF Holder cell included with soft tip threaded knobs. Tough and very light, easy to disassemble for cleaning the filter with optical wipes. Cell does not put any tension on the optics. For this reason the glass element is able to move slightly within the cell by about 0.5mm.