New products

• Connects to Skywatcher AZ-GTi mounts
• Works with Windows, but also with ASIAIR PRO, Raspberry and Linux
• Cable length 1.8 m

• Complete control of your camera, autoguider and automatic tracking of your mount via your smartphone or tablet
• Large memory capacity of 256 GB
• Wireless control - no tangled wires between mount, camera and computer
• Standalone autoguider function in combination with a suitable camera like the ASI120Mini - ideal for all astrophotographers with DSLR, no more need for a computer in the field
• Image preview and focusing assistance in real time for convenient and precise focusing
• Debayer for all ASI color astro cameras with image processing
• Almost all mounts are supported, e.g. Skywatcher or iOptron
• ASIAIR works with iOS and Android operating system
• Simple to use and interface with clearly arranged surface
• ASIAIR supports also DSLR cameras and mirrorless system cameras
• Finder bracket is included in the scope of delivery, so ASIAIR can be mounted on the telescope instead of a finder.
• The microSD card slot of the previous versions has been removed. You can use USB memory sticks or transfer the data to a computer via the USB-C port.

The new Acuter S80 H-alpha solar telescope at a super price!

• Telescope 80/400mm with Crayford focuser
  
• Star diagonal mirror with 8mm block filter for solar observation
  
• Centre mirror without accessories for night observation
  
• Front telescope with <0.6 Å HWB and 40mm diameter
  
• Solar finder
  
• Starpointer
  
• 5-16mm zoom eyepiece
  

For exact adjustment of the distance between camera and corrector - for astrophotography.

• Material: Aluminium
• Suitable for: M54x1 and M54x0.75 thread
• Diameter: inside 54 mm, outside 64 mm
• The ring is placed over the M54 external thread of the adapter
• The ring guarantees a clean stop and shortens excessively long connection threads, e.g. when adapting CCD cameras

• Fixation with three M4 grub screws
• For reproducible focus position of 3" correctors on focusers with 3" clamping
• Simply slide over the 3" sleeve of the corrector and clamp

• Built-in temperature sensor
• Zero backlash
• Manual adjustment
• Position memorizing during power off

• Telescope connection: female M117x1 thread with 360° rotation
• Can also be attached to refractors via special adapter
• Connection on the eyepiece side is 2" and 1.25"
• M82x1 male thread, M77x1 female thread, M74x1 male thread and M69x1 female thread for screw adaptations
• Drawtube travel is 50 mm
• Bearing via stainless steel rail with ball bearings
• Adjustment via toothed rack - rack-and-pinion principle
• Suitable for EAF motorized focus without additional adapter

• Inner diameter 68.5 mm, fits exactly over the M68 external thread
• Aluminium

• Material: Aluminium - silver anodized
• Suitable for: 2" filter thread M48x0.75
• The ring is simply slipped over the male M48 thread of the adapter.
• The ring also prevents the threads from seizing.
• A thread which is too long can be shortened with the fine tuning ring.
• Example of use (with extension tube) can be seen at left
• Inside diameter is 48 mm - outside diameter is 55 mm

• Suitable for: T2-threads
• The ring is simply slipped over the male T2 thread of the adapter
• The ring also prevents the threads from seizing
• A thread which is too long can be shortened with the T2 fine tuning ring.

  Material: aluminum silver anodized
• Example of use (with extension tube) can be seen at left
• Inside diameter 42 mm - outside diameter 52 mm

• New: Power supply via USB - also works via computer or ASIAIR
• Can easily move up to 5 kg
• ASCOM, ASIAIR and INDI are supported
• ZWO EAF works with every capture software
• Control focus via smartphone or tablet
• With versatile connecting plate for all common focusers, for example from TS-Optics, Astro Tech, Feather Touch ...
• Standard version with motor focus, flexible busbar and USB2.0 cable which is also used for power supply
• If you need a hand controller and a temperature sensor, you should consider the ZWO-EAF-A.

TS-Optics Adaptor with female T2 thread and male M48x0,75 filter thread

The adapter extends a male T2 thread to M48x0.75 (2") filter thread without increasing the length.

• Female thread: continuous T2 - M42x0.75
• Male thread: continuous 2" filter thread - M48x0.75
• Length: 4 mm - the mechanical length is optically not effective, as the adapter is completely sunken in the connection adapter

Artesky Fast Focus Plane Kit

Allows easy adjustment of the focal plane and backfocus

• Tilter unit with 36 to 39 mm thickness
• Three female adapters, four male adapters
• Works especially well with CMOS cameras with up to 17.5 mm backfocus

• 3° stabilisation angle
• Low energy consumption with only two AA batteries
• Automatic switch-off function after 90 minutes
• APC function (Angle Power Control)
• Ergonomic design, extra-long focussing wheel

• 3° stabilisation angle
• Low energy consumption with only two AA batteries
• Automatic switch-off function after 90 minutes
• APC function (Angle Power Control)
• Ergonomic design, extra-long focussing wheel

• The new version of the OCAL collimator uses a larger front lens and a CMOS sensor. The new sensor is much more light sensitive. This allows adjustment even under darker conditions. If the image is too bright, you can adjust down via gain and exposure time.
• The improved optics of the OCAL version 3.0 ensure that critical areas can now be focused even better.
• The area in the center around the lens of the OCAL is now easier to distinguish from the background. This enables clean alignment even under difficult conditions, for example when a center mark obscures the lens.
• The clarity of the image has been significantly improved. Especially with a corrector connected, the image is now much better than with previous models.
• Suitable for Windows and Android.

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.

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.