Issue with exposure pulsing/blooming when recording video

I've read about other NX1 users experiencing issues where the exposure changes whilst recording video, even in manual mode when all settings are constant.

I have experienced similar issues but not in manual mode - it's where I have it in shutter priority and the aperture automatically changes, which seems to result in a sort of pulsing and change in exposure. I think this may be more apparent when using an older lens, as it doesn't seem to happen as much with the S lenses.

Has anyone else experienced this?

markyboy81 wrote:

I've read about other NX1 users experiencing issues where the exposure changes whilst recording video, even in manual mode when all settings are constant.

I have experienced similar issues but not in manual mode - it's where I have it in shutter priority and the aperture automatically changes, which seems to result in a sort of pulsing and change in exposure. I think this may be more apparent when using an older lens, as it doesn't seem to happen as much with the S lenses.

Has anyone else experienced this?

I have had experience with this exposure problem. After reviewing many forums on this issue, I decided for myself that it's all about the latest firmware 1.41. This firmware solves problems with communication with mobile devices, but the exposure jumps. If you go back to 1.40, the exposure problem should go away, but there will be problems with wireless communication with devices.

I have several NX1 since 2015 and I use mostly the S lenses in P mode. The exposure corrects itself mostly in a second but I never have any problem with exposure stepping.

To be honest the new NX1 I have won't connect with my phone anyway.

How do you revert back to 1.40? I thought you could only updgrade?

There are no problems with downgrade to the older version of firmware using an SD card.

Here is a EOSHD forum thread about this NX1 issue from 2015:
https://www.eoshd.com/comments/topic/7770-nx1-exposure-drift-problem-fix/page/10/

I don't suppose you have a link to the 1.40 firmware file?

Here is the link on my Google Drive:

https://drive.google.com/file/d/1WkwaxOzDMeN6mUtV8d8F8tOzYggOFsr-/view?usp=sharing

Or other old NX firmware can be downloaded using Wayback Machine service:

http://web.archive.org/web/20150831065127/http://matteverglade.com:80/cameras/nx-firmware/

Thanks so much, I've sent a message to request access to it.

That wayback machine is fantastic! Already retrieved firmware to update some lenses!

markyboy81 wrote:

I've read about other NX1 users experiencing issues where the exposure changes whilst recording video, even in manual mode when all settings are constant.

I have experienced similar issues but not in manual mode - it's where I have it in shutter priority and the aperture automatically changes, which seems to result in a sort of pulsing and change in exposure. I think this may be more apparent when using an older lens, as it doesn't seem to happen as much with the S lenses.

Has anyone else experienced this?

If you are using one of the priority modes then the camera is likely at an aperture threshold and opening/closing the aperture in response to small scene changes. That would create the pulsing effect since stuff like ISO and aperture change in steps, not smoothly.