Old 10-03-2011, 06:41 AM
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Heath (Heater)
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Join Date: Sep 2010
Location: Melbourne
Posts: 193
2" HA or Clip in EOS HA Filter

Hi all,

I have two DSLR cameras, the first being a full frame unmodded 21.1mp and the second a modded and cooled 400D.

I occasionally get to darker skies, but do more imaging from home under substantial light pollution.

I am considering shooting in HA which would assist under poor light conditions and would be interested in any opinions as to whether there could be an advantage using both cameras through a threaded 2" HA filter, or whether I should just go for an EOS clip and solely use the 400d in HA? I know the modded camera with the fitted UV/IR filter makes it more sensitive to HA but my understanding is that a 7nm or a 12nm filter with dramatically increase contrast?

Thanks Heath

Last edited by Heath; 10-03-2011 at 09:18 AM.
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