Astronomy Specialist

ZWO EFW MINI 5 X 1.25"

$206.00 USD
SKU: ZWO-EFW-MINI

ZWO


 

The ZWO Electronic Filter Wheel Mini weighs only 300 grams, it is CNC machined and the optical thickness is only 20mm. It supports 5 x 1.25" filters or 5 x 31mm filters.

 

 

The power absorption of the EFW is only 120mAh @ 5V so any USB cable can power it up.

The distance between the filter and sensor of the Pro cameras, like the ASI 1600, is about 10mm. This close distance prevents any vignetting with 1.25″ filters for telescopes up to f/5. For f/2 lenses or telescopes it is necessary to use 31mm filters.

 

 

How to install the filter?

The EFW fits 1.25″ filters with a maximum thickness of 7mm + 3mm for the thread. To install 1.25" filters:

  1. Take the back cover off
  2. Lay the wheel down flat
  3. Screw on the filters
  4. Put the back cover on

To install 31mm filters:

  1. Take the back cover off
  2. Lay the wheel down flat
  3. Hold the filters by the very edges and lay them on the filter wheel slots
  4. Lock each filter with a "mask" and a set of M2 screws
  5. Put the cover back on

To use the filter wheel:

  1. Install the ASCOM driver on your computer
  2. Plug in the USB 2.0 cable
  3. On the Ascom options, select ZWO filter wheel (1) or ZWO Filter Wheel (2). There are two options to allow 2 filter wheels at the same time. 

 

Compatible filters 5 x 1.25" / 5 x 31mm unmounted
Ports
USB
Power draw 120 mA @ 5A
Power supply USB cable
Maximum thickness of the filter 7 mm (not including threads which must be less than 2.7 mm)
Optical thickness 20 mm
Camera connection
M42 x 0.75 female
Telescope connection M42 x 0.75 female
Camera compatibility 4/3" and smaller ASI cooled cameras or cameras with a male M42 x 0.75 thread
SKU ZWO-EFW-MINI
 

     

     

    1. EFW mini body
    2. 1.25″ cover
    3. T2 nose piece
    4. 1.25″ holder (with cover and 2 screws)
    5. T2-T2 adapter (male)
    6. A bag of filter masks
    7. USB 2.0 2m cable
    8. Phillips screwdriver
    9. A bag of M2 screws

     


     

      

     

    55mm backfocus with 4/3" or 1" cooled cameras

     

     

     

    55mm backfocus with 4/3" or 1" cooled cameras and OAG

     

    Customer Reviews

    Based on 9 reviews
    89%
    (8)
    11%
    (1)
    0%
    (0)
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    W
    Wayne Williams
    ZWO EFW Mini 5x1.25

    Just what I needed for using broadband filters for imaging nebula & galaxies.

    A
    Alphonso Wunsch

    Works very smoothly. No connection problems. Very long usb flat cable Good quality

    B
    Bartholome Turcotte

    ZWO EFW MINI 5 X 1.25"

    M
    Myrtice Barton

    ZWO EFW MINI 5 X 1.25"

    A
    Arnoldo Boyer

    ZWO EFW MINI 5 X 1.25"

    ZWO EFW MINI 5 X 1.25".

    ZWO EFW MINI 5 X 1.25"

    $206.00 USD

    Optical design

    Image circle

    Focal ratio

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    Focal length

    Optical thickness

    Threads

    Cooled

    Colour or Mono

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    Fullwell capacity

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    Filter size

    1.25"

    Filter size

    1.25"

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    Dovetail saddle

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    Counterweight shaft

    Azimuth adjustment range

    Internal diameter

    Illuminated diameter

    Compatible telescope external diameter

    Weight

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