Originally Posted by millicent
I've been a Catleap SE (DVI only) owner for about a week now. One of things that sold me was the claim that it had low to virtually no input lag. I did a fair amount of reading online before i bought the monitor and there are plenty of posts in this thread and others that explain why this monitor has low lag. Well I tried some shooters in the past week and it just didnt feel right so i ran some tests with my limited equipment. I setup the Catleap against another panel that i had in the house and this is what i got:
The Catleap was transitioning from 100-130ms while the Dell ST2410 (5ms response) was already at 130-150ms. Correct me if im wrong but this means that the Catleap is slower than the ST2410, which is already pretty laggy with an OSD, scaler and multiple inputs like HDMI/RGB. I'm not sure if this is due to the fact that there are just more pixels to process on the panel itself? Or maybe the quality of the electronics? I wish i had a DSLR camera with a fast shutter so i could capture this better. Im assuming you need a tube monitor + DSLR to measure the actual lag in ms.. if any of the owners here happen to have this equipment i urge you to please run a proper test so we can put the numbers up against similar monitors like the Crossover, Shimian or Apple Cinema.
Why does everyone keep using that crappy flatpanels.dk timer? It's no good. Don't use it. You can clearly see that the timer is not updating properly. There shouldn't be a 20-30 ms difference between frames. Using a faster shutter speed won't make a difference.
Cloning is also not guaranteed to be synchronized. You cloned the displays with no way to see where each monitor is refreshing, so there's no way to see the desynchronization, and with desktop composition enabled, the desynchronization may not be consistent. That's probably where the difference is coming from.
Use this program instead: http://hardforum.com/showthread.php?t=1423433
(Download link: http://goo.gl/DeUBm
Disable desktop composition by setting the desktop theme to Basic or Classic (or disable desktop composition in the .exe properties) and mirror the displays as usual, then run the .exe file directly (not the .bat files) and maximize the window. That should show six columns with each column representing one frame. The program will synchronize with one of the monitors, and the other monitor will show a line of tearing if they're not perfectly synchronized. If there is tearing, wait for the line to drift off the screen, then take a picture. If the line of tearing does not move, you will have to add a custom resolution for one of the monitors with a slightly different refresh rate like 61 Hz, then try again.
That will give you an accurate picture of the true lag difference. I bet both monitors are nearly identical.
The ST2410 probably doesn't have any significant lag. Monitors lag because they buffer frames, not because they have an OSD/scaler/multiple inputs. For some reason, all of the current 2560x1600/1440p monitors with an OSD/scaler/multiple inputs buffer one frame, but that's not the case with most lower resolution monitors.
Most monitors lag within 2 ms of an exact number of frames, and both of those monitors should have 0 frames of lag.Edited by ToastyX - 7/13/12 at 1:07pm