Nikon Camera Default Flicker Reduction Frequencies

photon78s

Certain cameras have a flicker reduction feature to help reduce the appearance of flicker in photos. For example, the Nikon Z9 camera manual lists "default frequencies" of light sources:

[PRE1]: 7680 Hz
[PRE2]: 3840 Hz
[PRE3]: 2880 Hz
[PRE4]: 1920 Hz

https://onlinemanual.nikonimglib.com/z9/en/updating_high_frequency_flicker_reduction_375.html

jordan

photon78s glad to see you back!

photon78s

Philips PDS unveils outdoor LED display with 10,000 nits brightness and 7680Hz refresh rate

https://www.techradar.com/pro/geeks-look-away-philips-pds-unveils-outdoor-led-display-with-10000-nits-brightness-and-7680hz-refresh-rate-and-yes-ive-asked-and-theres-no-typo-in-these-numbers

I don't quite understand this statement from the article above:

"While comparing a display like the Philips Urban LED 6000 Series with a computer screen is useful for demonstrating its power and the needs required, it’s important to understand that it’s not a like-for-like comparison. While a typical refresh rate for a monitor might be 60Hz-240Hz, an outdoor display designed to be viewed from a distance needs to be much higher."

JTL

photon78s I don't quite understand this statement from the article above:

My guess is just typical marketing mumbo jumbo

photon78s

From the Nikon Camera User Guide (https://onlinemanual.nikonimglib.com/z8/en/caring_for_the_camera_and_battery_cautions_377.html)

This is referring to the OLED screen which used for the viewfinder on this camera.

Should you experience any of the following symptoms while framing shots in the viewfinder, discontinue use until your condition improves:

nausea, eye pain, eye fatigue,

dizziness, headache, stiffness in your neck or shoulders,

queasiness or loss of hand-eye coordination, or

motion sickness.

The display may rapidly flicker on and off during burst photography. Watching the flickering display could cause you to feel unwell. Discontinue use until your condition improves.

AshX

photon78s

Yet another example proving that yes, companies are aware of flicker, and despite this they will incorporate it in devices.

photon78s

If one absolutely has to use this or another similar type camera, I think the potential solutions are:

Try using a loupe for the LCD display as your viewfinder instead of the OLED viewfinder.
Use some portable monitor you find comfortable connected to the HDMI output of these cameras.
Go into settings for the device and if available, adjust the refresh rate and/or size of the image that is displayed in the viewfinder. Try the setting for shrinking the image that is displayed and be mindful of extreme brightness settings. Some newer viewfinder OLEDs can reach 4000 nits.

Certain other devices use tiny LCD viewfinders with field sequential color technology and people report strain from the sequential display of RGB colors.

Otherwise, avoid modern cameras and go back to devices with optical viewfinders.

Seagull

photon78s Otherwise, avoid modern cameras and go back to devices with optical viewfinders.

On this point, anything sold as a DSLR has an optical viewfinder. Anything sold as 'mirrorless' cannot have an optical viewfinder so you will always be looking at a display of somekind, even if it has a viewfinder.

Nikon's are also quite good with their HDMI support, I have an old D3300 that I use for recording video via its HMDI out and a capture card.

photon78s

Seagull

I remember being impressed with the optical viewfinder of an old film Nikon (forget which exact model). I also used a D7000 that was also ok.

The viewfinder tech follows in the steps of whats happening with the associated industries (televisions, etc.)

Found this:

More years ago than I care to remember, I had to spend a few hundred hours in college labs with single tube microscopes. That commonly caused a lot of strain and headaches also. The grandfatherly, emeritus prof there taught me to keep both eyes open. Viola, very little strain ensued.

https://www.photo.net/forums/topic/397469-how-do-you-deal-with-eyestrain-from-the-viewfinder/