HELP! What are these white spots?

mattd85

mattd85

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Matt
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Hi all,

I have noticed lately, especially when taking photo's in the dark that there is lots of white dots all over my images? I always ensure my lens and filters are dust free so could this be inside the lens or on the mirror? I've also herd you can get fungus growth in there some how?

If any one can help thanks, also where can i get my cam and lenses all professionally cleaned or serviced?

Thanks

Matt

example below:
DSC00815.jpg


:bang::bang:
 
hard to say for sure, but that looks like light flare, possibly caused by a filter if one is fitted, they tend to cause light to bounce around inside the lens during night shots and create sort of spots you are seeing. I am assuming you mean the white blob under the white 'V' light trail?

Any more samples with other spots to compare?

Oh, and it wont be the mirror, any mirror marks do not show on the image.
 
I can see some tiny white spots there,

on long exposures you tend you get a few defective pixels usually you will get a mix of White, Red and Blue Pixels

I may be totally wrong but I've always thought of them as

White = Dead Pixels
Red = Hot Pixels
Blue = Cold Pixels

:lol:

When you consider that your average sensor is made up of several million pixels you are going to get the off fubar one :bang:

Matt
MWHCVT
 
Yv said:
Hells bells matt, how far did you have to tip your screen to see those? :eek: Found them now but had to perform a right old wiggle [ooerrrrrr] :lol:
Click to expand...

:lol: gotta wiggle occasionally but in this instance I didn't when you do as many long exposures as I do you start to spot them a mile off especially against such a dark background :D

Incidentally and if I'm honest I don't know why but I've found if I shoot RAW I get little to no issue with dead/hot/cold pixels, I don't know if they are caused by in camera JPEG processing :thinking: :shrug:
 
MWHCVT said:
Incidentally and if I'm honest I don't know why but I've found if I shoot RAW I get little to no issue with dead/hot/cold pixels, I don't know if they are caused by in camera JPEG processing :thinking: :shrug:
Click to expand...

If you use Lightroom, I think this is because LR handles hot/dead pixels differently with a raw image rather than a jpg.
 
Thanks for all the feedback.

As requested here is another shot for comparison, i suppose when im viewing my pictures on a 40" TV then i will notice these alot more hahaha.

DSC00861.jpg
 
As already suggested these are 'hot' pixels. When current is applied to the sensor for more than a second as in a timed exposure they will show up. You can either clone them out afterwards or set 'Long Exp NR' to 'ON' in your menu options.
 
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