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OK, quick question - With a dome that has a push-to revolving top half would it be advisable / safe to open it up on a sunny day, point the dome opening at the sun and just point the scope (with the caps off) North so the sun should never track to it, in order to eliminate any fungus that has formed on surfaces? I realise the fungus would still be around, perhaps on interior surfaces that don't catch the sunlight, but warmth from the sun shouldn't affect the scope should it?
How often would you say this should be necessary to keep the fungus factor under control?
Similarly, should an eyepiece case be left open and exposed to direct sunlight, and should the eyepieces have both caps off in order for scattered UV to contact the glass surfaces? Will this be sufficient to kill off fungus etc (I read in a post that about 20 minutes should be sufficient)? Is there any danger from or to eyepieces so long as they are not directly pointing at the sun?
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!