Latitude E6510 Owner's Lounge

Thanks. I'm tempted to give it a shot myself.

 

I didn't realize how good the panel on the E6510 was until I tried using a W520. I knew the E6510's panel was great for sRGB coverage, but I didn't realize it's PWM frequency or the direct control mechanism is so good.

After the W520 kept making me nauseous, I decided to compare them side by side.

I think I vaguely understand that this may have to do with the shutter speed of the camera, where it may be syncing up with the refresh rate or the PWM frequency, but I would love to hear any explanations.

 

I noticed that my Pentax K-01 takes a much better screen photo than my other photos. I then discovered that it has a Flicker Reduction setting in the menu which was set to 50Hz which evidently cancels out the LCD's refresh rate (most are 50Hz but a few are higher) or maybe it's the backlight modulation. Your photos aren't directly comparable because one screen is significantly darker than the other and, when you zoomed in, that may have caused the shutter speed to get into the range where the flicker becomes evident.

I have noticed backlight flicker on a few panels over the years but only at very low brightness settings. I used to have problems with CRT monitors in the old days when many struggled to provide a decent resolution at a comfortable refresh rate.

John

 

I actually took photos at different shutter speeds and I noticed a consistent discrepancy.

Either way, I'm going to return the W520, some people have pushed the refresh rate to really high values using some tweaking, but I don't know if I want to mess with the hardware.

As for the darkness,

I did this.

W520: Max Bright E6510: Max Bright
W520: Min Bright E6510: Min Bright
W520: Match the brightness of the E6510's Min Bright E6510 : Min Bright

 

I had a request for E6510 owners.

Could someone tell me what the brightness levels are in cd/m^2 for the lowest brightness setting and the one above that.

That is, if the brightness levels go from 0 to 15, can someone please tell me the brightness value at levels 0 and 1?

I tried measuring it using the phone camera but it doesn't seem reliable. I looked up the spec sheet but it doesn't break the numbers down by brightness steps. (Unless I've overlooked something.)

Thanks!

 

I suppose there is this : http://www.lagom.nl/lcd-test/contrast-ratio.html

 

Did some quick and dirty measurements using a phone app and came up with the following values with the phone resting against the display:

Level 0 : 10-11 lux
Level 1 : 15-28 lux
Level 15 : 250-260+ lux

Haven't yet figured out the correct way to measure it in cd/m^2.