Maiznblu_757 From United States, joined Mar 2002, 5112 posts, RR: 60 Posted (5 years 8 months 3 weeks 2 days 10 hours ago) and read 894 times:
I was zooming in some really hazy conditions with my Canon 100-400mm L IS today. I got home and opened up the pics and after post prOcessing, I have 5-7 little dark circular spots around my photo.
This is the first time I have seen this on any of my photos. Can anyone offer some insight?
Vafi88 From United States, joined Apr 2001, 3116 posts, RR: 27 Reply 3, posted (5 years 8 months 3 weeks 2 days 9 hours ago) and read 844 times:
Maiznblu - instead of telling us what it looks like, show us a picture and don't bomb Jeff for trying to help you. From your description, it DOES sound like you need some cleaning.
Maybe you have a dirty lense?
I'd like to elect a president that has a Higher IQ than a retarted ant.
ExitRow From , joined Dec 1969, posts, RR: Reply 4, posted (5 years 8 months 3 weeks 2 days 9 hours ago) and read 841 times:
Sensor dust.
It generally shows up in areas of little detail, like blue sky. It's probably on all your photos, you just don't see it.
Try blowing some DRY air on the sensor with the mirror locked up. If you try and physically clean the sensor on your own it's gonna be another 50 thread starters for sure ...
Maiznblu_757 From United States, joined Mar 2002, 5112 posts, RR: 60 Reply 6, posted (5 years 8 months 3 weeks 2 days 9 hours ago) and read 838 times:
Once again, its only on a few photos. I have been analyzing this more than Jeff has the last hour, and it only seems to be on images I took in RAW format in full zoom. Its not all of them either. Only a few.
I just processed a few pics that were taken in HQ JPEG with nothing wrong.
JeffM From United States, joined May 2005, 3256 posts, RR: 59 Reply 8, posted (5 years 8 months 3 weeks 2 days 9 hours ago) and read 827 times:
I told you what they are, William told you what they are. Now, do some research and tell us all why they only show up on some photos. Many of us understand why and can tell you, but to really learn, find that info for yourself.
There is also a great thread on how to clean that sensor. We have been banging it around for over a year on here. And that IS what you will need to do. Two basic methods, one is fool proof, the other is hit and miss.
AIRHEAD711 From United States, joined Mar 2002, 249 posts, RR: 3 Reply 11, posted (5 years 8 months 3 weeks 1 day 23 hours ago) and read 716 times:
Do what Craigy says. Take a pic of the clear sky. Open it up in Photoshop in fullsize(actual pixels). Then hit auto levels. Every dust spot you have will stick out like a sore thumb.
Maiznblu_757 From United States, joined Mar 2002, 5112 posts, RR: 60 Reply 12, posted (5 years 8 months 3 weeks 1 day 20 hours ago) and read 681 times:
Thanks William,Craig, and....
Scott. WOW is right. I dont think I could drop myself to that level. Your a better man than me.
Fireguy274 From United States, joined Dec 2003, 299 posts, RR: 12 Reply 13, posted (5 years 8 months 3 weeks 1 day 20 hours ago) and read 673 times:
Chad do what Exit Row said first. Blow the sensor off good with a hand blower with the mirror up. I had the same spots you speak of and this took care of it....Artie
Maiznblu_757 From United States, joined Mar 2002, 5112 posts, RR: 60 Reply 14, posted (5 years 8 months 3 weeks 1 day 20 hours ago) and read 669 times:
I just ordered a Sensor Swipe and the pads and that Eclipse stuff. It cost me 30 dollars. Hopefully it will work. I dont really want to blow the dust around. I would like to to get rid of it.
Fireguy274 From United States, joined Dec 2003, 299 posts, RR: 12 Reply 15, posted (5 years 8 months 3 weeks 1 day 19 hours ago) and read 662 times:
I bought the same stuff Chad but was able to just blow the sensor off real well with a hand blower and I have not had the problem since and didnt have to use the cleaner. Keep in mind if you clean that sensor yourself its not covered under warranty if you damage it....Artie
Tappan From United States, joined Oct 1999, 1527 posts, RR: 53 Reply 16, posted (5 years 8 months 3 weeks 1 day 13 hours ago) and read 598 times:
BLOWBALL.....
It is called a blowball........
VERY cool rubber thingamajig that saved my cameras (and ultimately my photos) from sand when I recently went on a trip to St Maarten.
Very inexpensive and, I kid you not, it is named blowball.
Mark Garfinkel
P.S Transportation Security screeners at the airport will take it out of your camera bag and think it is some kind of a sex toy
Bronko From United States, joined Jul 2001, 801 posts, RR: 20 Reply 17, posted (5 years 8 months 3 weeks 1 day 12 hours ago) and read 569 times:
I used a blowball today with my 300D, they work great. You should be able to find one at a baby supply store. I have also used it to suck the dust off when I could see it.
Maiznblu_757 From United States, joined Mar 2002, 5112 posts, RR: 60 Reply 18, posted (5 years 8 months 3 weeks 1 day 10 hours ago) and read 548 times:
I read that if you take a Q Tip, (NOT TOUCHING the sensor!)holding it just above the sensor, the polarity will cause most dust particles to "jump" to the Q-tip. Anyone heard this?
JeffM From United States, joined May 2005, 3256 posts, RR: 59 Reply 19, posted (5 years 8 months 3 weeks 1 day 10 hours ago) and read 541 times:
Assuming polarities are such that the dust will move off the sensor and not opposite, which can happen as well. Magnetic EMF can be a funny thing, but getting those stringy 'hairs' from a Q-Tip inside the sensor box wouldn't be. Only lint free pec pads should be used in my opinion.
If using the blower, you will have some success, but your likely to have a few stubborn spots remain. Too much air and you risk damage to the shutter, too little, and you will probably just move the spot to another location.
A custom cut spatula, a pec pad, two drops of Eclipse, and some reading glasses will work wonders (don't laugh about the glasses...). The only method I have used that works first time, every time.
Ckw From , joined Dec 1969, posts, RR: Reply 20, posted (5 years 8 months 3 weeks 1 day 4 hours ago) and read 527 times:
I'm with Jeff on this - does the trick for me. But for emergency in the field removal of a large (ie easily visible) speck, I'll use the "speck grabber" - followed by a proper clean on return home.
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