mtomalty Posted December 12, 2012 Share #1 Posted December 12, 2012 Advertisement (gone after registration) Hi Was just reviewing some M9 images which had exposure times of 2 seconds. Tripod, of course. Subject matter is moving water. When looking at the images it is clear that details such as bubbles and foam is not being recorded as one continuous blur but rather 4 'pulses' where one can see the defined moving objects recorded four times. Would this be regarded as a normal process where a sensor is recording once every 1/2 second in this particular case or could this be regarded as some sort of timing/writing inaccuracy? Thx for looking Mark Quote Link to post Share on other sites More sharing options...
Advertisement Posted December 12, 2012 Posted December 12, 2012 Hi mtomalty, Take a look here M9 long exposure readout. I'm sure you'll find what you were looking for!
Fgcm Posted December 12, 2012 Share #2 Posted December 12, 2012 I have never seen anything similar from my M9 My long exposures are "normal" Franco Quote Link to post Share on other sites More sharing options...
tele_player Posted December 12, 2012 Share #3 Posted December 12, 2012 Very interesting. Was there anything special about the lighting? Was this shot taken while the camera was writing previous shots to the SD card? Quote Link to post Share on other sites More sharing options...
theno23 Posted December 12, 2012 Share #4 Posted December 12, 2012 Yeah, that's definitely not normal - I've done a lot of long exposure work with my M9, including moving water, and never seen this. I don't think the CCD has the capability to do electronic shuttering, or multiple readout, so I can't imagine it can be that. - Steve Quote Link to post Share on other sites More sharing options...
theno23 Posted December 12, 2012 Share #5 Posted December 12, 2012 Could be an actual physical effect, maybe there was standing waves in the water? - Steve Quote Link to post Share on other sites More sharing options...
pgk Posted December 12, 2012 Share #6 Posted December 12, 2012 Could be an actual physical effect Sounds right to me. Easy to test - drop a white object in front of the camera on a similar shutter speed (paper or something light). I'll bet you just get a single blur and that your posted pic is an anomaly due to uneven water motion:). Quote Link to post Share on other sites More sharing options...
Bill W Posted December 12, 2012 Share #7 Posted December 12, 2012 Advertisement (gone after registration) Very strange. I have shot moving water with my M9 and always get the normal silky effect. Did you take other shots and are they all the same. Quote Link to post Share on other sites More sharing options...
Michael Geschlecht Posted December 12, 2012 Share #8 Posted December 12, 2012 (edited) Hello Everybody, Is it possible that these are ghosts from the flash or fill flash of ANOTHER nearby camera or flash? Perhaps a camera that allows flash at higher shutter speeds by repetitvely flashing an electronic flash as the shutter curtain sweeps across the image plane. Best Regards, Michael Edited December 12, 2012 by Michael Geschlecht Quote Link to post Share on other sites More sharing options...
mtomalty Posted December 12, 2012 Author Share #9 Posted December 12, 2012 Definitely not flash or other artificial light source related. When I get home this evening, i'll try to source additional files from other cameras that I have shot this particular scene over the years. Other images in the same sequence with the M9 had similar characteristics so not a one off write issue (if it is,even, an issue at all) The M9 used was a reps loaner so can't replicate a situation with the specific camera. The water,bubbles and foam in the original crop were travelling counter clockwise. There is a small waterfall out of frame on the left and the area photographed in the crop was a detail of a small whirlpool out of the main current I have attached an additional file taken two summers ago with an S2 of the same whirlpool File had exposure time of 8 seconds Quote Link to post Share on other sites More sharing options...
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