Anyone know what this is? Red/Green banding on long exposures

Started Mar 15, 2016 | Discussions
dreyko
dreyko Regular Member • Posts: 455
Anyone know what this is? Red/Green banding on long exposures

This was shot on a d610 with a 24-120 f4 vr and a b+w 10 stop filter. I have seen this a number of times but only on long exposures. This was 1+ minute.

I intended to convert to B+W but unfortunately the shot is ruined I think. I thought this was an issue with the filter but I had it with a hoya 9 stop and now a B+W 10 stop. Ive also had this on a d7100.

Yes the eyepiece was covered, I used a hood, and the lens/filters were clean. I wasn't shooting into the sun and I only see this on exposures of 15+ seconds, sometimes its worse than others but not always related to exposure time.

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Nikon D750 Nikon AF-S Nikkor 28mm f/1.8G Nikon AF-S Micro-Nikkor 60mm F2.8G ED Nikon AF-S Micro-Nikkor 105mm F2.8G IF-ED VR Nikon 85mm F1.8G +5 more
Nikon D610 Nikon D7100
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j_photo Veteran Member • Posts: 3,972
Re: Anyone know what this is? Red/Green banding on long exposures
1

Lens light leak?

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beeley Junior Member • Posts: 33
Re: Anyone know what this is? Red/Green banding on long exposures
1

It looks like light from the viewfinder. You need to block the eyepiece off.

jtgraphics Contributing Member • Posts: 700
Re: Anyone know what this is? Red/Green banding on long exposures

j_photo wrote:

Lens light leak?

My first thought also try other lens same setup to test and figure out if its the lens or body with the issue.

Shoot and make it do this again then put on another lens same conditions same setup and see if its also on photos.

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JTGraphics

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Janoch
Janoch Veteran Member • Posts: 4,261
Re: Anyone know what this is? Red/Green banding on long exposures
1

My money is on ND filter flare...

Can you replicate the issue without filter?

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Alan Brown
Alan Brown Veteran Member • Posts: 5,655
Re: Anyone know what this is? Red/Green banding on long exposures

beeley wrote:

It looks like light from the viewfinder. You need to block the eyepiece off.

He said he did in his post.

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There is a very fine line between 'hobby' and 'mental illness.' :'!':

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shotupdave Forum Member • Posts: 75
Re: Anyone know what this is? Red/Green banding on long exposures

was it the same lens/filter combo? do you have a 6 stop filter that you can get a long exposure with?

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DAVID MANZE Veteran Member • Posts: 5,594
Re: Anyone know what this is? Red/Green banding on long exposures

I shoot a similar shot covering the camera completely except the lens, that's the viewfinder and the lens mount, all except the lens glass itself!

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Dave's clichés

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maljo@inreach.com Veteran Member • Posts: 7,726
Light leak?

I have not seen anything quite like this.

Looks like a light leak.

You have seen it with two different cameras and two different filters, but using the same lens.

Try a different lens, otherwise same set up and see if it happens.

Are you covering the viewfinder with the black plastic piece Nikon supplies?

maljo

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Cloned Regular Member • Posts: 300
Re: Light leak?
1

As another test I would take another shot with the lens cap on, with the entire camera covered, and at the same settings (exposure time, ISO, WB, etc). If the issue goes away, it's a light leak from somewhere. If the issue still occurs its a problem with the sensor. With very long exposures you can get sensor heat noise, but I have never seen it in the middle of a sensor. it's usually just along one edge where the sensor offloads the data.

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jtgraphics Contributing Member • Posts: 700
Re: Anyone know what this is? Red/Green banding on long exposures

Janoch wrote:

My money is on ND filter flare...

Can you replicate the issue without filter?

Very good chance this is it also.

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JTGraphics

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dreyko
OP dreyko Regular Member • Posts: 455
Re: Anyone know what this is? Red/Green banding on long exposures

I cannot replicate it without the filter, exposure time is not long enough I guess.

I believe I found it though. Using live view and a speedlight I triggered the speedlight all over the body and found that even with the eyepiece blocked off I was able to get light passing from the area around the eyepiece. My guess is that the eyepiece doesn't get completely sealed off with the plastic cover.

Well, I guess a proper viewfinder shutter is on my next cameras list of requirements. Shame the d750 I ordered doesn't have one. Perhaps there are minor differences between the d610 and d750 that will alleviate this issue.

 dreyko's gear list:dreyko's gear list
Nikon D750 Nikon AF-S Nikkor 28mm f/1.8G Nikon AF-S Micro-Nikkor 60mm F2.8G ED Nikon AF-S Micro-Nikkor 105mm F2.8G IF-ED VR Nikon 85mm F1.8G +5 more
Janoch
Janoch Veteran Member • Posts: 4,261
Re: Anyone know what this is? Red/Green banding on long exposures
2

Sounds plausible...

Cure is as simple as a bit of dark clothe over the viewfinder, when shooting these long exposures.

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Nikon D800 Nikon AF-S Nikkor 17-35mm f/2.8D ED-IF Nikon AF-S Nikkor 70-200mm F4G ED VR Sigma 105mm F2.8 EX DG Macro +2 more
jtgraphics Contributing Member • Posts: 700
Re: Anyone know what this is? Red/Green banding on long exposures

dreyko wrote:

I cannot replicate it without the filter, exposure time is not long enough I guess.

I believe I found it though. Using live view and a speedlight I triggered the speedlight all over the body and found that even with the eyepiece blocked off I was able to get light passing from the area around the eyepiece. My guess is that the eyepiece doesn't get completely sealed off with the plastic cover.

Well, I guess a proper viewfinder shutter is on my next cameras list of requirements. Shame the d750 I ordered doesn't have one. Perhaps there are minor differences between the d610 and d750 that will alleviate this issue.

I also like using these for my cameras,

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JTGraphics

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rumple
rumple Senior Member • Posts: 1,139
Re: Anyone know what this is? Red/Green banding on long exposures

Janoch wrote:

Sounds plausible...

Cure is as simple as a bit of dark clothe over the viewfinder, when shooting these long exposures.

Bingo.  I use and old, black t-shirt.

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"THINK" - Watson

result42 Regular Member • Posts: 291
Use the eyepiece cover provided with the camera. On D800 and above it's built in.

I do long exposures all the time with heavy ND filters and without a doubt this is your issue.

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