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Old 16-07-2015, 08:19 AM
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Camelopardalis (Dunk)
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Question Sensor cleaning or fun with flats?

Folks,

I've noticed that I've accumulated some muck on my Canon sensor, I thought I'd noticed it in one of my recent images and I took some daytime flats just for kicks and I've got a couple of pretty obvious blotches when I stretch the image.

Anyone know of somewhere I can get my sensor cleaned in the Brisbane area, or anyone brave enough to do it for me? Not sure I'm brave enough to try it myself so close to AstroFest

When it comes to flats, I've not had much luck...maybe my heart just hasn't been in it and I can find the motivation with the new baby scope and all, but every time I try to get DSS to add flats I get all kinds of weird and wacky output.

Any thoughts / suggestions / recommendations / comments welcomed

Cheers,
Dunk
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Old 16-07-2015, 09:11 AM
glend (Glen)
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I clean my Canon 450D sensor, a few times actually. It may not be a dirty sensor but the cover glass ( the anti-alysing filter). If it's the front filter you can clean it without taking the camera apart.

First look at it, you can do this by turning your ISO down low, and setting a manual bulb shot. Activate the shutter and you will be able to see the filters and sensor. Do not shine a torch in there, a red sstro light on low setting is all that I would use. If the first filter is dirty try to blow it off with a puffer first, then a soft lense brush, if its still there try a little acetone (pure) on a soft sensor brush. That should take care of it. Most sensor artifacts in photos are on the outside filter. Good luck.
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Old 16-07-2015, 10:57 AM
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Eek! Thanks Glen, I'll work up some courage...

Medicinal acetone or is there a better source for the pure stuff?
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Old 16-07-2015, 11:18 AM
glend (Glen)
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I use the pure acetone from Bunnings (small bottle is plenty). Some people use isopropal alcohol but I found it seems to leave a film as it drys. Just be careful you don't slop acetone onto any painted surface. You can use the artist brushes sold at Bunnings in the Craft section - get the very fine camel hair ones.
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Old 17-07-2015, 06:55 AM
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Cool, appreciate the tips
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Old 17-07-2015, 08:30 AM
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As well as cleaning your sensor, learn to take good flats as you can chase dots in your imaging train forever and go cleaning crazy, which will only frustrate you.

Get an EL panel or talk to Exfso about a light box with a variable brightness control.
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Old 17-07-2015, 02:06 PM
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Eclipse fluid and sensor swabs - easy as Bro.

Greg.
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Old 17-07-2015, 04:29 PM
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killswitch (Edison)
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Quote:
Originally Posted by gregbradley View Post
Eclipse fluid and sensor swabs - easy as Bro.

Greg.
+1 to this.
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Old 17-07-2015, 06:39 PM
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Yikes! They even make products for this!? So this is a common problem then
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Old 18-07-2015, 09:04 AM
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killswitch (Edison)
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You can take it to Canon as well they charge like $60. Free if your a CPS member.
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Old 19-07-2015, 09:38 AM
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Quote:
Originally Posted by Camelopardalis View Post
Yikes! They even make products for this!? So this is a common problem then
Interchangeable lens cameras have their sensors exposed to dust every time you change lenses. Some change their lenses with the sensor facing down to minimise this. Also don't change your lens in a dusty or windy environment. Change lenses fast and have everything ready before you change.

I find I don't have to clean very often but you will eventually.

Some cameras also shed debris or oil from the shutter mechanisim.

Nikon D600 was notorious for that and required a redesign of the shutter box by Nikon and they released the identical apart from the shutter, D610.

Greg.
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Old 19-07-2015, 09:41 AM
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Eek! Thanks Edison, looks like the fluid is cheaper
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