Filterwheels

The Altair Electronic Filter Wheel EFW holds 7x2" astronomy filters and is driven by a precision stepper motor with accurate positioning system. 

The Altair Electronic Filter Wheel EFW holds 7x 36mm astronomy filters and is driven by a precision stepper motor with accurate positioning system. 

The Altair Electronic Filter Wheel EFW holds 5x2" astronomy filters and is driven by a precision stepper motor with accurate positioning system. 

The Altair Electronic Filter Wheel EFW holds  8x1.25" astronomy filters and is driven by a precision stepper motor with accurate positioning system. 

The new filter drawer for Nikon F lenses was developed by ZWO especially for cooled ASI cameras.

•  Lens side connector: Nikon F mount
•  Connection camera side: T2 external thread - can be extended to M54x0.75 thread
•  Drawer length 29 mm without T2 external thread
•  The holder snaps in precisely with 2 magnets
•  The 2" filter can be easily screwed into the holder
•  The article includes the filter drawer, a filter holder and an adapter ring from T2 to M54
•  Important for the purchase of further filter holders: Only the linked filter holder fits, older versions are not compatible.

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.