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Black Spot On The Lens?  
User currently offlineLIPH From Italy, joined May 2004, 848 posts, RR: 1
Posted (7 years 7 months 3 weeks 4 days 16 hours ago) and read 3613 times:

Looking into the viewfinder of my 30D I can see a little dust spot (shaped like a samll worm) in the lower right angle. Actually it is not a CMOS dust spot because it disappears changing the lens. I tried to look and clean (pretty quickly to be honest) the front and back side of my Canon 100-400 but it's still there. Any idea ? Thanks in advance.

Regards


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9 replies: All unread, jump to last
 
User currently offlineRanger703 From United Kingdom, joined Jun 2005, 157 posts, RR: 0
Reply 1, posted (7 years 7 months 3 weeks 4 days 16 hours ago) and read 3601 times:

More then likely to be some dust on the mirror if you are seeing it when you look through the viewfinder.I have something similar on my 20D,however it doesnt affect my pictures.

User currently offlineJeffM From United States of America, joined May 2005, 3266 posts, RR: 51
Reply 2, posted (7 years 7 months 3 weeks 4 days 15 hours ago) and read 3583 times:

Quoting LIPH (Thread starter):
Actually it is not a CMOS dust spot because it disappears changing the lens.

Obviously. Nothing on your sensor shows up in your viewfinder. Think about it.......

Most likey on your mirror.


User currently offlineInterpaul From Germany, joined Jul 2004, 409 posts, RR: 3
Reply 3, posted (7 years 7 months 3 weeks 4 days 14 hours ago) and read 3575 times:

That lens is also known for sucking dust. Maybe there's some dirt inside your lens.

Jan


User currently offlineLIPH From Italy, joined May 2004, 848 posts, RR: 1
Reply 4, posted (7 years 7 months 3 weeks 4 days 7 hours ago) and read 3539 times:

Quoting Ranger703 (Reply 1):
More then likely to be some dust on the mirror i



Quoting JeffM (Reply 2):
Most likey on your mirror.

It does not affect my picture neither, but is there a way to get rid of it ?
Thanks.



Life sucks. Then you die. Live fast, die young.
User currently offlineInterpaul From Germany, joined Jul 2004, 409 posts, RR: 3
Reply 5, posted (7 years 7 months 3 weeks 4 days 1 hour ago) and read 3492 times:

How could it be on the mirror, if it disappears when using a different lens?

Jan


User currently offlineCalgaryBill From Canada, joined May 2006, 686 posts, RR: 5
Reply 6, posted (7 years 7 months 3 weeks 4 days ago) and read 3480 times:

Quoting LIPH (Reply 4):
It does not affect my picture neither, but is there a way to get rid of it ?



Quoting LIPH (Thread starter):
it disappears changing the lens.

These two comments contradict each other. If the spot is in the lens and you can see it in the viewfinder, then it's going to show up in pictures as well. To confirm this, try several shots of clear, blue sky at different aperatures.

But since you say it doesn't appear in pictures, the spot must be on the mirror. Of course, if the mirror is dirty you would see the spot regardless which lens you mount.

Time to do some testing to figure out which one it is.
B


User currently offlineCodeshare From Poland, joined Sep 2002, 1854 posts, RR: 1
Reply 7, posted (7 years 7 months 3 weeks 3 days 23 hours ago) and read 3465 times:

Quoting LIPH (Thread starter):
it disappears changing the lens

Like JeffM wrote above it vould be on the mirror or maybe the camera viewfinder.

Quoting Interpaul (Reply 5):
How could it be on the mirror, if it disappears when using a different lens?

Because the mirror lifts up when the shutter is released.

KS/codeshare



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User currently offlineLIPH From Italy, joined May 2004, 848 posts, RR: 1
Reply 8, posted (7 years 7 months 3 weeks 3 days 23 hours ago) and read 3464 times:

Quoting CalgaryBill (Reply 6):
Time to do some testing to figure out which one it is.

Thanks guys...Actually will check better if it shows in pics. As far as I'm concerned it shouldn't (also because it's quiet large and it should be easily visible...), but will give an extra look.

Thanks



Life sucks. Then you die. Live fast, die young.
User currently offlineInterpaul From Germany, joined Jul 2004, 409 posts, RR: 3
Reply 9, posted (7 years 7 months 3 weeks 3 days 21 hours ago) and read 3442 times:

Quoting Codeshare (Reply 7):
Quoting Interpaul (Reply 5):
How could it be on the mirror, if it disappears when using a different lens?

Because the mirror lifts up when the shutter is released.

That doesn't depend on the lens he's using.

Jan


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