Dark Current Enable Tool

[Iliah Borg]

Here are some Nikon D810 ~300 sec shots taken at different ISO settings
http://s3.amazonaws.com/IliahBorg/Nikon ... C_1686.NEF
http://s3.amazonaws.com/IliahBorg/Nikon ... C_1685.NEF
http://s3.amazonaws.com/IliahBorg/Nikon ... C_1684.NEF
http://s3.amazonaws.com/IliahBorg/Nikon ... C_1683.NEF

[astronomer]

[astronomer]

[Iliah Borg]

> From the histogram, the bias level always centered at 600ADU.

Right. Let's see some "mode 3" shots tomorrow. It switches off long exposure noise reduction / median filter.

> we stack many dark frames to get the average dark signal value from each pixel and subtract it from light frame to do the calibration

Sure.

[Iliah Borg]

> Manual lens will disable the dynamic scaling only

And leave WB preconditioning / R/B calibration scaling as it is.

> new lens has much better optical design

I use EL lenses to evaluate in-camera raw processing, and rarely for imaging purposes - unless I need to shoot in UV or IR.

[astronomer]

[Andrew]

Hi. I am very excited by this post- I use D800 for scientific research. Was the link taken down for this program? I can't seem to find it.

[astronomer]

[Andrew]

Thank you very much for this tool.

Has anyone tested this with using remote control software to control camera over USB? I have been trying with the following procedure but It seems to put the camera in an error state and then it needs to be power cycled to communicate again-

1. run dark current enable tool, leave program open
2. run camera control software
3. camera control software gives error saying the device is busy

Thanks,
Andrew

[astronomer]