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Re: Dark Current Enable Tool

PostPosted: Wed Sep 10, 2014 2:46 pm
by astronomer
Thank you very much!
I could confirm it works.

Re: Dark Current Enable Tool

PostPosted: Thu Sep 11, 2014 5:54 pm
by arthurking83
Is there any way to support the D800E?

If it's not too different from the D800 I don't mind testing on my D800E.

Thanks.

Re: Dark Current Enable Tool

PostPosted: Thu Sep 11, 2014 9:11 pm
by astronomer

Re: Dark Current Enable Tool

PostPosted: Fri Sep 12, 2014 9:42 am
by mads0100
Thank you Astronomer! Is there any way to use this without tethering?

Re: Dark Current Enable Tool

PostPosted: Fri Sep 12, 2014 2:56 pm
by astronomer

Re: Dark Current Enable Tool

PostPosted: Sat Sep 13, 2014 4:25 am
by D80
Hello astronomer!

Have I understand this correctly if this disable the "star eater" just in USB tethering mode? To control the camera through a computer. This would be perfect for my Nikon D600, I have the 1.02 firmware and 2.000 distortion map installed.

Kind regards
D80

Re: Dark Current Enable Tool

PostPosted: Sat Sep 13, 2014 8:06 am
by Oknoder
Downloaded last night and will be testing on d800e in a few. I plan on taking 30s subs at all iso with cap on both teathered and free. Just for side by side comparision.


Ill post my results, much appreceated.
Oknoder

Re: Dark Current Enable Tool

PostPosted: Sat Sep 13, 2014 5:48 pm
by arthurking83
D800E:

Took various test images, in almost complete darkness. vf shutter closed, lens cap on, camera under the desk to maintain darkness as best as possible.

6 test shots each @ ISO100, 400, 800, 1600, 3200 and 6400(just to see any differences in rendering).

First set of images with NikonBlackLevel(NBL) set to enabled in camera look fine.
All images look good, a noticeable difference in black level from ISO100 to 400, and a steady increase in RGB levels from there on.
ie. where ISO 100 is black (0,0,0) ISO400 is more like 3-4 RGB values.
The difference between images with black level enabled and those where its reset back to disabled is a marked one, especially compared to the images with LNR set to ON(which has been my preference for most low light photography.

BUT! .. a second series of test shots with NBL set to enabled in camera .. all 6 images rendered a solid magenta colour. (ie. some kind of data problem ???).
The magenta image's RGB pixel values area pretty steady 135, 62, 108 across the entire frame. ie. a solid magenta coloured frame .... not magenta banding or smudges or various hot pixels here and there.
Now every time I set NBL to on, I only get these magenta images(or images with a very strong magenta cast over them)
With NBL set to off, the camera operates as per normal.

If I capture a normal image(as opposed to a dark frame) with NBL on there is a very strong magenta cast over the image and exposure appears to be around 1-2Ev too bright compared to the same exposure with NBL set to off.

I note that when NBL is enabled in the camera, the option to turn LNR on or off is disabled. At this point I'm assuming that NBL is set to on.
Upon resetting the camera, the option to enable/disable LNR is returned, which I assume NBL is now off again.

If this is not normal, I can provide raw images if you need them for analysis.

Re: Dark Current Enable Tool

PostPosted: Sat Sep 13, 2014 6:53 pm
by astronomer

Re: Dark Current Enable Tool

PostPosted: Sat Sep 13, 2014 7:05 pm
by astronomer