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I joined the forum to learn more about risks and success of filter removal for UV and IR photography.
Back in 2011, one of the group's members, was trying to do just that:
Unfortunately Stephen hasn't been active in the group since 2014, but the filter removal appears to have gone well (at least the S3 wasn't killed in the process).
I have the same exact camera and I'm looking forward to try the same exact procedure. Does anyone has any tips on how to do this successfully/safely?
Had a clear, but v cold night here last night (11th Dec), and got the widefield rig out again. Skies weren't too great, despite the cold - a covering of snow always seems to make for much brighter skies.
I imaged the area around the Flaming Star Neb (IC405) using the modded 350d + Canon 85mm EF combo. Here's 79x5min (6h35m) at ISO400, f4, through an IDAS P2. Lens is a bit sharper at f4.5, but wanted to try and get as much signal as poss, without completely wrecking the stars.
I offset the framing to have a tilt at getting the SN remnant Simeis 147, the Spaghetti nebula (Sh2-240). Bearing in mind this is a non narrowband image with an uncooled camera, I'm fairly pleased to see it there (though v faint!!!). Most definitely one for an HA filter attempt with a more suitable rig! Would have been nice to have M37 not quite so close to the edge... :-/
Original and annotated at 2048px width below.
Thanks for looking!
Another widefield I took on 25th/26th Nov using my Baader modded 350d and Canon 85mm EF f1.8 USM (working at f4.5). This is 21x5min, so 1h45m total taken at ISO400 using an IDAS P2 filter from here in Oxfordshire.
I'm sure the region doesn't need too much introduction. To be honest, it needs a lot more exposure, and arguably taking with something more sensitive with less read noise! Being a bit further south would help me too...there was a heavy dose of DBE to sort the gradients out here.
Barnard's Loop, the Bogeyman, M42/3, Flame and Horsehead all relatively easy, and the dusty stuff (part of The Orion Molecular Cloud Complex) that extends between them passing by M78 is reasonably obvious, though the fainter stuff is all a bit noisy still. There's also the bluish nebulosity LBN 915 *just* on the limit of visibility to the right of Sh2-278 that extends around the right of eta Orionis. As I said though, it all needs much greater SNR, and less need to resort to MMT for noise reduction... (any more and it started to adversely affect the image).
Both images reduced to 2048px width here for convenience.
Thanks for looking.