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Old Feb 13, 2005, 2:02 AM   #1
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Tried to expand my sports photography with the FZ20 into low light gyms and am running into a problem with circular white spots or blotches appearing in random locations in some pictures but not in all. I saw this on a low end digital that I used before but thought it was just a problem with that particular camera.

http://www.darwinonline.org/thumbnails.php?album=2345

I've cleaned the lens and I have about a 50% occurrence of the spots. Sizes, shapes and locations are allways different and some pics are clean. Or appear to be. I've found that sometimes the spots are so light they don't show until post processing. The link is to a raw shot.

Ideas??

Thanks

TheOldMan
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Old Feb 13, 2005, 6:53 AM   #2
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Are you by any chance using the stock adapter and a filter (UV)? I've seen unwanted stuff on photos twice before. One was with that adapter and a UV filter, in bright light, the reflection of the lens off of the filter. Of course in that case, it was obvious and very repeatable. Probably not the case here.

The other time, it wasn't actually random but appeared to be.. Some indoor shots, the flash was bouncing off of a window and back at the camera, but not directly. That is, the camera wasn't pointed straight at the window. It caused all kinds of junk to be in the photo. Looks to me like stray reflections. It may be a silly question but might there have been something floating around that light could reflect back from?

Another possibility, were others taking photos at the same time?

Then there's the obvious worse case, it's the camera. However, I think what you are seeing is external, not the camera.

I would try a similar situation in a different location in attempting to nail it down.

Good luck,
Jeff
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Old Feb 13, 2005, 8:29 AM   #3
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Just a guess, but that sure looks like something on the lens. But maybe not.

I would try to pin point the problem as soon as possible, in case it needs to be repaired.

Are you using a filter? If so remove it.

Do you have a hood on when the spots appear? If not try using one and if you are using one remove it.

Can you see any dust on the inside of the lens. There were quite a few people who did not use an adapter and filter with the FZ10 that complained of that.

But as more people used 3rd party adapters and filters that complaint started to go away. But I have not seen one complaint of that with the FZ20.

Keep us posted and maybe someone else has seen that exact thing and can help.
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Old Feb 13, 2005, 8:43 AM   #4
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Did you see the replies at DPreview?

Popular opinion ...its dust in the air!
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Old Feb 13, 2005, 9:12 AM   #5
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I'm wondering about another low light issue with the FZ20. Whenever

I press halfway down on the shutter button to go into autofocus, the

screen goes so dim so that I can't see the subject anymore. Is this normal?

Thanks.
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Old Feb 13, 2005, 9:23 AM   #6
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Those white spots look like dust reflection to me. The dust is not on your filter/lens, it's in the air. When the flash is fire off the dust bounces back the light and creates random white spots on the final picture. It is very common for a small sensor digital camera when taking picture in a dusty environment (eg somebody smokes nearby).

Try to take pictures without the flash, the random white spots will go away for sure. No need to worry too much. :-)
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Old Feb 13, 2005, 9:39 AM   #7
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canuk007 wrote:
Quote:
I'm wondering about another low light issue with the FZ20. Whenever

I press halfway down on the shutter button to go into autofocus, the

screen goes so dim so that I can't see the subject anymore. Is this normal?

Thanks.
That is the way the FZ cameras operate, the worse part of an otherwise fine camera.

You can get around it somewhat by using shutter priority and/ or increasing the exposure compensation to +1 or so.
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Old Feb 13, 2005, 5:37 PM   #8
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Saw the replies at DP review. I was having trouble accessing that board yesterday and didnt' know if the post made it.



Thanks

TheOldMan
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Old Feb 13, 2005, 5:39 PM   #9
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I"m also going with the dust angle since

I cleaned the lens

No filters in use

Spots on average on 1/2 the pics only

I had crenked the on camera flash to high to try for more distance

ISO was 200 and some at 400.

Locations of spots are random in different pics.

Thanks for the feedback

TheOldMan


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