D850 Sensor Issue

[caffeina]

Hi all, i'll write you because on the end of August 2018 i'll buy that DSLR and i have, since the first shoot, too much red, blue, green and white pixel that comes out randomly since 3" (or longer) exposure. NR long exposure on or off don't change that result and NR hi iso mi too. LTR Lab from Nikon Italy remapped the sensor, but that no solve the problem. Your cam present in low light the same problem or not?

thanks to all for your time
Paolo

[Frank Fremerey]

I would call Nikon for a replacement

[MFloyd]

Would be interesting to see some sample pictures.

By the way, do you have the latest firmware version (1.02) ? Version (1.00): "Photos taken with On selected for Long exposure NR would sometimes have increased noise or shadows with a greenish cast."

[caffeina]

1.02 stock fw and i upload you some photos in next hours. Thanks for the attention.

[caffeina]

https://imageshack.com/a/img922/9503/dTPmEW.jpg

[Erik Lund]

Defective camera, send it in for repair.

[richardHaw]

not good 

[MFloyd]

https://imageshack.com/a/img922/9503/dTPmEW.jpg

Can you tell me where you find a problem in this picture ? Beside, it's not ideally exposed and processed.

[Bjørn Rørslett]

Looks like Long Time NR is off.

[caffeina]

i'll try same shots 2 or more with the same settings for each level and setup of NR ISO and NR long exposure. Changes are poor and hot pixels position is totally random for number or position.

[Birna Rørslett]

The exposure times aren't excessive, as witnessed by the slight star movement. Thus LNR should be able to cope well with any tendency towards hot pixels.

I still have a feeling that LNR isn't activated.

[Erik Lund]

Sure if Long Exposure Noise Control is off it can result in the above,,,

[caffeina]

@birna, i'm sure that LNR is activated because i set it Activated and Deactivated in the same session and, when i shoot with LNR on DSLR shot the dark frame after and result busy for that. I've shot 2 times each photo and the hot pixel change position randomly between the 2 shot in any LNR an ISONR settings

[caffeina]

if i shot from same position with same settings with Canon 70D hot pixels are 2/3

[MFloyd]

i'll try same shots 2 or more with the same settings for each level and setup of NR ISO and NR long exposure. Changes are poor and hot pixels position is totally random for number or position.

Maybe a silly statement; but the bright spots you see below, reflected in the water, are not hot spots, but stars.