[cometcatcher (Kevin)]

Yeah well, Ha is already infrared, but... I have an infrared filter with "650nm" written on it so thought it would be interesting to put it in the optical path and see what happens since Ha is 656nm or so. Most Ha filters have IR cut, this one has IR pass. It's meant for daylight IR scenes.

I'm not quite sure what to make of the result, other than it might make a good topic of conversation on the infrared forums.

I'm also getting a 720nm IR filter so that will be interesting to see what it looks like.

GSO 10" F4 Newtonian, modified Canon 1100D, 650nm IR filter, 258 x 30 seconds unguided on a HEQ5 Pro. From Rigel Observatory.

First semi-clear night in a month! 90% Moon present.