Yes the light does have mode memory. The battery used is mentioned in the OP. If I was a gambling man which I'm not I'd say it was a rewrapped Sanyo cell with their own protection circuit on it. Just a guess though.
It looks really good and the price is attractive too. If I didn’t blow my money on another Convoy lights earlier this month I would definitely grab this. Well, shortlisted this for next month.
The term rolling shutters on DSLRs is deceptive since there is no physical shutter involved with the actual phenomenon, tather it refers to how the sensor reads data. Most CMOS sensors have the "rolling shutter" effect since data is recorded "lines" at a time as opposed to the entire sensor at a time. Useful gif and more info here: http://www.diyphotography.net/everything-you-wanted-to-know-about-rolling-shutter/
Awesome, thank you for that explanation, Calvin! So it only applies to the sensors on DLSR cameras, or all sensors on all cameras? I would think that if it were a phenomenon of my cell phone’s sensor than it would do it on every flashlight, and most of my collection that claims constant current is quiet as a mouse on my ZTE Engage’s camera. Or, the rolling shutter is what gives you the actual interference lines. I also get the interference patterns on a couple flashlights that Selfbuilt says have no PWM and just noise in the circuit, but I’m not entirely sure I buy that, if that “noise” is visible to my camera. I know that Selfbuilt is the man, but how would the camera “see” noise? Seems like just a slightly different flavor of PWM and maybe it becomes a semantic discussion.
And “rolling shutter” sure sounds like the same refresh it also does painting those same bits to the monitor: line by line. The fact those bits aren’t read off the sensor and written to the monitor in one shot is probably at the heart of why our cameras detect PWM either way (?). Since my camera’s video recorder also sees PWM, then maybe there’s always a lag on both sides: i.e. the reading of the bits from the sensor and the writing of those bits to the camera’s monitor? I just know the video recorder sees it too.
It applies to DSLR cameras with CMOS as opposed to CCD sensors. Though most modern DSLR cameras use CMOS nowadays. You would have to check what type of sensor you have on other types of cameras. The noise might be a response to the switching regulators but personally I don't see that effecton my phone camera with current-controlled lights, only known PWM lights.
For the most part I only see that effect on known PWM lights, too. There were just a couple I tested where my camera showed that effect and Selfbuilt called it noise. Other than that, my tests agree with everyone else’s tests.
