Yomo

On my A7s I noticed that when shooting in SLOG2 if I go up to ISO 8000 the image will have a different noise pattern than if I go up to ISO 10,000 and then down to ISO 8000, same ISO but totally different noise
I know that people have reported a similar issue with the A7sii with SLOG3 but what I read was it was believed to only be a bug with that picture profile

It's this kind of "Trick" ISO that does something weird to the noise
Going up give the ISO a kind of "Dirty" grain but going down to the very same ISO will give the ISO a "Clean" grain

I compared Native 3200 to this ISO 8000 when it had a "Clean" noise and also the "Dirty" noise
http://imgur.com/RzOCZko
http://imgur.com/AWU0IED
http://imgur.com/G6QoXWl

The thing is I see this not just on SLOG2..I see it on all picture profiles..on multiple different camera models...

On the A7s this happens on the following Picture Profiles on the following ISOs:
http://imgur.com/SLmoyEF

Here is a video of me going over the issue and explaining more in-depth:
https://youtu.be/Omp5SMrifwI

I've had my Sony A7s for a year now and within the week of getting it noticed that I had a hot pink dead pixel smack dab in the middle of my sensor..I noticed this while reviewing footage after a long day shooting a short...

I was pretty upset but mostly just because my brand new camera had a dead pixel on literally the first thing I used it on

After doing some digging I found that the camera doesn't have a setting to fix this like other cameras but you can force the camera to remap the sensor which will remove the dead pixel

I made a quick video showing how to do so:

https://youtu.be/LP1M7vZRwb0

I've known about this for a year now but just never got around to making a tutorial

I've had atleast a dozen hot pixels so recommend doing this every time you are about to use the camera for a shoot

Hope this helps somone