Generally true, though I have found strobe crosstalk photography is much more forgiving for cellphones. Guide lines and pursuiting are not necessary when analyzing strobe crosstalk, with one major caveat: For static photography of strobe crosstalk, it is indeed important that the camera exposure is no more than 1 strobe backlight flash for accurate crosstalk photos, or we get additional duplicate images above and beyond. (Pursuit camera requires several refresh cycles to be exact)ericl wrote:In the previous example, there are no guide lines (hell, the images aren't even flat, they are taken at an angle) AND it looks like they were taken with a cell phone. In addition, they are also using fine tuning adjustments from another user monitor which might not be the best for his specific monitor.
Sometimes you can find evidence that single-exposure of strobe flash happened:
(1) The 144Hz one is definitively single-flash-exposure
(2) The 240Hz has indirect evidence of single-flash-exposure: Part of the 240Hz photo is dark (camera sensor rolling scan artifact) which is excellent evidence of single-exposure photo because if it was multi-exposure, there would not be a dark section. Indeed, the dark section and rolling scan behaviour of a camera sensor does provide some moderate distortion, the amount of strobe crosstalk that I see when zooming in, looks reasonably accurate representaton of blur reduction on 240Hz -- strobe crosstalk is worse at 240Hz than for 144Hz. Also, it is possible the LG monitor overdrive is not adjusted in an optimal way for its blur reduction.
There's a possible error margin in these photos, but the artifacts I see, deem them reasonably accurate-enough photographs for comparative purposes, at least from my own educated analysis due to my familiarity with photography artifacts confirming how the photographs were taken. Albiet subject to sensor rolling-scan distortions and minor deviations from WYSIWYG, it's a roughly accurate approximation of the rough amount of strobe crosstalk found at default settings. I have troubleshooted user setups this way before, with my photograph-analysis smarts.
Also, cellphones can still easily function with amateur pursuit photography for free (without a rail), see new thread including iPad camera pursuit that I have posted.