10 stop noise problem

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bluedodge

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Hi all

I have recently bought a b&w 10 stop filter and am having problems with noise jn my shots. Am using a nikon d90, sigma 18-200 at 200 iso and about a 2 sec exposure. I've tried with in camera noise reduction both on and off but it seems to make no difference.
Any help would be greatly appreciated.
Cheers
 
Most cameras have a special noise reduction for long exposures, where the camera takes a black frame with the shutter closed and then subtracts it to remove any hot pixels/pattern noise that can sometimes show up in long exposures.
Make sure you have this switched on, it can make a big difference.
 
squishy said:
Most cameras have a special noise reduction for long exposures, where the camera takes a black frame with the shutter closed and then subtracts it to remove any hot pixels/pattern noise that can sometimes show up in long exposures.
Make sure you have this switched on, it can make a big difference.
Click to expand...

Nikon's Long Exposure NR might not work if the exposure is only 2 secs - it's really for 8 secs or slower (D90 manual p167).
 
bluedodge said:
Hi all

I have recently bought a b&w 10 stop filter and am having problems with noise jn my shots. Am using a nikon d90, sigma 18-200 at 200 iso and about a 2 sec exposure. I've tried with in camera noise reduction both on and off but it seems to make no difference.
Any help would be greatly appreciated.
Cheers
Click to expand...

Very odd, i use the B&W nd110 with the D90 and sigma 10-20 or tamron 17-50 without any problems especially at 2seconds. I will be honest and admit i dont cover the eyepiece half the time either although i dont allow direct light to hit it either. On avery long exposure i will cover it but up to 10 secs it appears to make no difference on my shots.

For landscapes i usually shoot at F11, ISO 200

Can you post a pic complete with Exif data so we can try help more?

Mike
 
Mr Mike said:
Very odd, i use the B&W nd110 with the D90 and sigma 10-20 or tamron 17-50 without any problems especially at 2seconds. I will be honest and admit i dont cover the eyepiece half the time either although i dont allow direct light to hit it either. On avery long exposure i will cover it but up to 10 secs it appears to make no difference on my shots.

For landscapes i usually shoot at F11, ISO 200

Can you post a pic complete with Exif data so we can try help more?

Mike
Click to expand...

6100748161_44170e219a_m.jpg



Exif data:

Aperture: f8
Shutter speed: 1.0s
Exposure bias: 0ev
ISO: 200
Focal Length (35mm): 78.0mm
Focal Length: 52.0mm
White Balance: Cloudy weather
Exposure Program: Manual
Metering Mode: Pattern
Exposure Mode: Manual exposure
Focus Mode: Manual focus
Focus Distance: ~30m (98ft)

Hope the image comes out, I'm new to this type of stuff.

Any comments/help greatly appreciated.:thinking:
 
Need a link to a bigger copy, that's far too small for anything
 
2s exposure? I smell heavy underexposure here. I am getting about 15-30s in broad daylight, and minutes in the evening. There is only noise lurking in the shadows which would explain your symptoms.

Cover that eypiece too. 1D makes it easy with mechanic switch, not sure about d80.
 
The clouds are noisy and underexposed. Is that pic derived from a camera NEF or a camera JPEG? If it's a JPEG, which IQ setting are you on - Fine, Normal or Basic?
 
Hmm - even with the underexposure the sky does seem very noisy. I'd try a comparison test, i.e. use a tripod and shoot the same subject with & without the 10-stop filter (both shots in M mode).
 
Ozei said:
Hmm - even with the underexposure the sky does seem very noisy. I'd try a comparison test, i.e. use a tripod and shoot the same subject with & without the 10-stop filter (both shots in M mode).
Click to expand...

underexpose it by 2-3 stops, then pull it back in post and you'll get exactly that.

The photo in question was shot with -1EV compensation while pointing at the sky (far brighter than 18% grey). Not only 10 stop filter lost any meaning there {ok, it is to slow things down to minutes and get some interesting effect; 0.5s doesn't count}. The shot needs to be exposed correctly, ie. should span the whole histogram.
 
*** for all your help. Have started using longer exposures and noise problems are sorted
 
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