SJP Posted February 16, 2011 Share #281 Posted February 16, 2011 Advertisement (gone after registration) We all can more or less voluntarily i guess. Best way is to take multiple measurements and average them imho.Agreed, but being a physicist by training I did that (about 10 tests if I recall, was some time ago) and none of the shots were "earlier than 0", most were exactly on zero and 1 or maybe 2 shots showed a very slight lag of 0.05 seconds. So we have roughly lag = 0.1/10 = 0.01 seconds and error is also in that ballpark so we have a lag range of 0 - 0.02 seconds. I don't think I am good enough as a photographer to "guess the lag", so this seems like a reasonable measurement to me. Maybe we can make a more accurate timer by tweaking the code? Probably is javascript or so, but I haven't checked. Link to post Share on other sites More sharing options...
Advertisement Posted February 16, 2011 Posted February 16, 2011 Hi SJP, Take a look here M9 shutter lag?. I'm sure you'll find what you were looking for!
jaapv Posted February 16, 2011 Share #282 Posted February 16, 2011 This is the test i was looking for. Thanks for retrieving it. I found 0.07 seconds for the M8 a couple of years ago. The R-D1 did 0.05 and the 5D1 0.09 sec if memory serves. Did not test the M9 though.The M9 should be similar. Same shutter as the M8.2 and nearly the same as the M8. Link to post Share on other sites More sharing options...
ho_co Posted February 16, 2011 Share #283 Posted February 16, 2011 I wonder how the M8's cropped sensor fits into the equation. Theoretically, if you fired both M9 and M8.2 shutter at the same instant, the shutter slit has to travel further in the M8.2 before it exposes the sensor. That dark time should add to the effective delay. Link to post Share on other sites More sharing options...
Guest nafpie Posted February 16, 2011 Share #284 Posted February 16, 2011 I wonder how the M8's cropped sensor fits into the equation. Theoretically, if you fired both M9 and M8.2 shutter at the same instant, the shutter slit has to travel further in the M8.2 before it exposes the sensor. That dark time should add to the effective delay. Theoretically, you are right. But the speed of the shutter curtains are fast. Actually, I mean very fast (about 6m/s = 20ft/s.). The difference from M8 to M9 are 6mm (24 vs. 18mm), a distance the shutter curtains covers in 0.001 seconds. This is almost nothing compared to the 0.08 sec shutter delay of the M8/M9, that time the camera electronic and mechanic needs to move the shutter after the button was pressed. Stefan Link to post Share on other sites More sharing options...
Lindolfi Posted February 17, 2011 Share #285 Posted February 17, 2011 Yes the travel time of the shutter curtains is very short indeed (0.003 sec). You can see this in I made at 1200 frames/second while the shutter is operated with a cable release (on the left). Shutter lag can also be seen as well as re-cocking of the shutter, very well damped indeed. This is also a nice way to check actual shutter times and whether the sensor becomes completely free for flash sync. Link to post Share on other sites More sharing options...
Lindolfi Posted February 17, 2011 Share #286 Posted February 17, 2011 You can also establish shutter lag with sound. Here two releases of the M9, one with 1/60 sec. (top panel) and one with 1/30 sec. (bottom panel) shutter time, sampled at 44.100 Hz. The first burst of sound happens right when pressing the button. Then there is a 0.09 second silence and the first curtain starts to travel, shown by the second burst. The third burst is the sound of travel of the second curtain, closing off the sensor. Remarkable how similar the sound waves are due to the exact way the mechanism of the shutter is operated. Every time the same way. Link to post Share on other sites More sharing options...
jaapv Posted February 17, 2011 Share #287 Posted February 17, 2011 Advertisement (gone after registration) Hey! Thanks! that should put an end to all speculation:) Link to post Share on other sites More sharing options...
Nicoleica Posted February 17, 2011 Share #288 Posted February 17, 2011 Hey! Thanks! that should put an end to all speculation:) I wouldn't bet on it Jaap. Not in an internet forum. Link to post Share on other sites More sharing options...
ho_co Posted February 17, 2011 Share #289 Posted February 17, 2011 Damn, Lindolfi! We had the thread up to over 280 posts, and you had to come along and spoil it with fact! Link to post Share on other sites More sharing options...
lct Posted February 17, 2011 Share #290 Posted February 17, 2011 So 0.09 sec shutter lag for the M9? Link to post Share on other sites More sharing options...
aesop Posted February 17, 2011 Author Share #291 Posted February 17, 2011 So 0.09 sec shutter lag for the M9? ...see post #123. Link to post Share on other sites More sharing options...
lct Posted February 17, 2011 Share #292 Posted February 17, 2011 Ah yes i forgot those old posts thanks. Link to post Share on other sites More sharing options...
Rick Posted February 17, 2011 Share #293 Posted February 17, 2011 This explains why I can't seem to take a decent puddle-jumping photograph and why I always get just the back tire of the guy on the bike, as he whizzes past. How am I ever going to take a good picture? Good grief, its hopeless. Link to post Share on other sites More sharing options...
jaapv Posted February 17, 2011 Share #294 Posted February 17, 2011 I wouldn't bet on it Jaap. Not in an internet forum. I have made a FAQ out of it, so we can refer to that with the appropriate amount of nastiness Link to post Share on other sites More sharing options...
aesop Posted February 17, 2011 Author Share #295 Posted February 17, 2011 Ah yes i forgot those old posts thanks. ...funny how these threads sometimes spin out of control. I am the OP, and was genuinely taken aback at the descernible shutter lag between my MPs and my newly-acquired M9. Gotta love this forum - first there was indignation that I could have the sheer effrontery to suggest there was a lag, then I was ridiculed (by forum members who really should know better) for being superhuman enough to be able to detect the lag. Others said it was just perception, my dietary and/or drinking habits, substance abuse etc., etc. (of course I jest). Thankfully, some progressive forum members had the common sense and courtesy to actually investigate the matter before responding to the question I originally posted. Then Stefan Daniel was quoted. Eureka! I didn't need Herr Daniel's input. The M9 lasted approximately four days with me - it was never going to improve my photography. Nor my puddle-jumping capturing technique. Link to post Share on other sites More sharing options...
ho_co Posted February 18, 2011 Share #296 Posted February 18, 2011 It's even funnier, aesop, that the thread is now more than twice as long as it was when Edi reported the answer from Stefan Daniel in that post. It's taken longer to get to the answer the second time. Thanks for reminding us of the déjà vu. Link to post Share on other sites More sharing options...
zlatkob Posted February 18, 2011 Share #297 Posted February 18, 2011 This thread reminds me of a quote attributed to Schopenhauer: "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." We have reached that third stage. Link to post Share on other sites More sharing options...
davidbaddley Posted February 18, 2011 Share #298 Posted February 18, 2011 Lindolfi - The question may have already been answered, but your solution was both simple and elegant. Nice work, thank you. - David Link to post Share on other sites More sharing options...
aesop Posted February 18, 2011 Author Share #299 Posted February 18, 2011 This thread reminds me of a quote attributed to Schopenhauer: "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." We have reached that third stage. ...truly amazing, zlatkob - there was even a feckless reference to my user name, the suggestion being that I was merely delivering yet another fable. Really. Link to post Share on other sites More sharing options...
lct Posted February 18, 2011 Share #300 Posted February 18, 2011 Lindolfi - The question may have already been answered, but your solution was both simple and elegant. Nice work, thank you. - David +1 Link to post Share on other sites More sharing options...
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