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<blockquote data-quote="WayneF" data-source="post: 446891" data-attributes="member: 12496">Their write up seems to be an actual shutter mounted in front of the lens. It does not have to measure exposure timing (the flash does that), it only has to open quickly.&nbsp; &nbsp;&nbsp; Better cameras with better faster shutters have less lag time.&nbsp; &nbsp; I measure 114 ms lag for a D70S, and 54 msec for a D300 (have not tried the D800).&nbsp; &nbsp; Lag time is not for the mirror, or at least, it measures the same with mirror up.&nbsp; I can't believe shutter speed affects lag, but shutter does have to pass the flash. Working in dim surroundings (so the fast flash is effective) doesn't really matter how slow the shutter might be. The shutter speed is just a window duration to catch the flash.&nbsp; If you make shutter too fast, the narrow window complicates catching the flash.Shutter lag does depend on the displays.&nbsp; The Rear LCD must be OFF, and the viewfinder must be ON.&nbsp;&nbsp; Shutter button half press does this, and is necessary before the timer is started (two hand operation).&nbsp; &nbsp; Must be low priority and&nbsp; takes the camera computer awhile to manage them.&nbsp; &nbsp; If otherwise, shutter lag is much longer, and quite variable.&nbsp; &nbsp; But if Rear LCD is off and viewfinder is on, D300 is 54 msec every time, repeatable forever (actually 52 msec, but I add 2 msec for a safety factor window).Grandiose expensive solutions are great for the seller, but I cannot image 54 msec matters to either the insect or the human photographer.&nbsp; Our reflexes are in the order of 1/4 second.&nbsp; Automatic trigger schemes can bypass that.&nbsp; But there are other ways then.I have the Cognisys Stop Shot for use with water drop splashes.&nbsp; It has three timers in it, and multiple input/outputs,&nbsp; so you can time for the water drop valve flow duration, and for the falling drop delay (trigger shutter then), and the shutter lag time before triggering the flash.&nbsp; Last two added is the actual drop delay.&nbsp; It works very well, but is a bit pricey.&nbsp; My writeup at <a href="http://www.scantips.com/drops/shako/" target="_blank">Shako Solenoid Valve for Water Drop Collision Photography</a></blockquote>

[QUOTE="WayneF, post: 446891, member: 12496"] Their write up seems to be an actual shutter mounted in front of the lens. It does not have to measure exposure timing (the flash does that), it only has to open quickly. Better cameras with better faster shutters have less lag time. I measure 114 ms lag for a D70S, and 54 msec for a D300 (have not tried the D800). Lag time is not for the mirror, or at least, it measures the same with mirror up. I can't believe shutter speed affects lag, but shutter does have to pass the flash. Working in dim surroundings (so the fast flash is effective) doesn't really matter how slow the shutter might be. The shutter speed is just a window duration to catch the flash. If you make shutter too fast, the narrow window complicates catching the flash. Shutter lag does depend on the displays. The Rear LCD must be OFF, and the viewfinder must be ON. Shutter button half press does this, and is necessary before the timer is started (two hand operation). Must be low priority and takes the camera computer awhile to manage them. If otherwise, shutter lag is much longer, and quite variable. But if Rear LCD is off and viewfinder is on, D300 is 54 msec every time, repeatable forever (actually 52 msec, but I add 2 msec for a safety factor window). Grandiose expensive solutions are great for the seller, but I cannot image 54 msec matters to either the insect or the human photographer. Our reflexes are in the order of 1/4 second. Automatic trigger schemes can bypass that. But there are other ways then. I have the Cognisys Stop Shot for use with water drop splashes. It has three timers in it, and multiple input/outputs, so you can time for the water drop valve flow duration, and for the falling drop delay (trigger shutter then), and the shutter lag time before triggering the flash. Last two added is the actual drop delay. It works very well, but is a bit pricey. My writeup at [URL="http://www.scantips.com/drops/shako/"]Shako Solenoid Valve for Water Drop Collision Photography[/URL] [/QUOTE]

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