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Gerd Neumann Neutral Density Filter Film for 220mm Aurora Panels

SKU : GN-10-310-220

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  • ND Rating: 1.2
  • Fits 220 mm Aurora Panels


Product Details

  • Gerd Neumann Neutral Density Filter Film for 220mm Aurora Panels

    The brightness of the Aurora Flatfield Panel is matched to work best with typical light intensity levels produced after passing through filters. If you are working with light from the whole spectrum, such as when using no filter or only a UV+IR blocked Luminance filter, you will likely have to the reduce the brightness of the panel. The brightness can be controlled electronically to some extent by reducing the input voltage of the inverter (12V inverter only).

    For very fast optical systems and/or large cameras with slow shutters, the brightness of the Aurora has to be reduced effectively. To that end, Gerd Neumann offers neutral density/ grey filter foils in corresponding sizes to be placed inside the frame of the Aurora panels. For customers with fast Astrographs and/or very sensitive cameras Gerd Neumann recommends getting more than one of these foils. The brightness is very even across the whole surface and it works well for the most critical imaging applications, even photometry or spectroscopy.

    Gerd Neumann Product Number: 10-310-220


  • specifications

  • included items

    • ND Rating: 1.2
    • Fits 220 mm Aurora Panels


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Filter Reviews:
    John M.
    United States

    Good product, quick delivery

    The item works well and in my view should be included with the flat field foil. The foil as is was to bright to take flats that were long enough to prevent shutter shadow on my Atik 383 ccd used on my SV80S refractor. Once installed in the foil the RGB flats were excellent but the NB filters Ha, OIII and SII were extremely long, 480 seconds for an SII flat field. I had to remove the filter and use white sheets of paper in front of the foil and no filter for Ha, OIII and SII flats. RGB flats were achieved by keeping the ND filter in front of the flat field foil and white sheets of paper. It took some engineering but I was able to produce good flats for all my filters. The foil does generate a superb flat field that is even across the entire field. If you have a fast system be aware of some issues using this product but the resulting flats are excellent.