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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 01 Sep 2009 (Tuesday) 22:33
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7D shutter lag time

 
pwm2
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Sep 02, 2009 11:03 |  #31

You normally always add debounce logic in either hardware or software, so it is quite universal to have delays in the region of 50ms from pressing a button until a device starts acting on it. Not having any filtering at all could result in your camera taking pictures just because you walk close to equipment with strong magnetic fields. Always getting photos taken if you stand near a microwave oven that gets started would result in very angry threads on this forum.


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Seanzky
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Sep 02, 2009 11:08 |  #32

Aren't the current 7D bodies being reviewed still the "beta" bodies not the production ones?


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CAL ­ Imagery
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Sep 02, 2009 11:20 |  #33

theflyingkiwi wrote in post #8567504 (external link)
wow talk about picky.

I am sorry if anyone ever thinks that the shutter lag being slower than an older camera is a sign of canon going backwards.

If you are ever serious about this stuff, you would look at ALL the specs and not pick up on one.

It's silly to have a camera with 8 FPS targeted towards sports and wildlife shooters and have a slower SL than previous generations of lesser cameras.


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twoshadows
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Sep 02, 2009 11:23 |  #34

nphsbuckeye wrote in post #8569665 (external link)
It's silly to have a camera with 8 FPS targeted towards sports and wildlife shooters and have a slower SL than previous generations of lesser cameras.

bw! Couldn't have said it better...


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Sep 02, 2009 11:25 |  #35

ed rader wrote in post #8566681 (external link)
the 5d is like a bare bones IQ monster :D.

ed rader

Well I've seen your sports pics taken with the 5d. I didn't see any flubs due to shutter lag time.


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Sep 02, 2009 11:27 |  #36

yonni wrote in post #8569697 (external link)
Well I've seen your sports pics taken with the 5d. I didn't see any flubs due to shutter lag time.

Do you honestly think he would post a shot he missed due to shutter lag? :lol:

Fwiw, i shoot sports with my 5D at times as well. No one (at least not me) is saying it's impossible to shoot sports with a slower camera, but it IS less convenient and there will be shots you'd miss for not having a faster camera.


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Sep 02, 2009 11:49 |  #37

shutter lag is very easly spotted be birders it can seem to take ages for the shot to be taken.
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MS-18E
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Sep 02, 2009 13:20 as a reply to  @ GyRob's post |  #38

Please forgive my ignorance here, but even at .064sm thats 3.36 times faster than the average human reaction time. Won't you have to have a reaction time at least 3 times quicker than the average human to have this become a perceivable factor in your camera?

And is the lag here the time delay after the switch is activated and the initial movement of the shuttle mechanism? If so, once the switch is activated and held in the on position, this lag factor should have nothing to do with the frames per second the camera is capable of right? That factor is limited by how fast the shuttle can physically come from a complete closed position to a complete open position.




  
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bacchanal
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Sep 02, 2009 13:33 |  #39

MS-18E wrote in post #8570418 (external link)
Please forgive my ignorance here, but even at .064sm thats 3.36 times faster than the average human reaction time. Won't you have to have a reaction time at least 3 times quicker than the average human to have this become a perceivable factor in your camera?

And is the lag here the time delay after the switch is activated and the initial movement of the shuttle mechanism? If so, once the switch is activated and held in the on position, this lag factor should have nothing to do with the frames per second the camera is capable of right? That factor is limited by how fast the shuttle can physically come from a complete closed position to a complete open position.

The lag time probably has a lot to do with the mirror getting out of the way in time for the shutter to open. The reaction time argument sort of applies, but remember, the lag time is added onto your reaction time...also, reaction time and perceptible lag are two different things.


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MS-18E
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Sep 02, 2009 13:52 |  #40

bacchanal wrote in post #8570501 (external link)
The lag time probably has a lot to do with the mirror getting out of the way in time for the shutter to open. The reaction time argument sort of applies, but remember, the lag time is added onto your reaction time...also, reaction time and perceptible lag are two different things.

Yes. Will it not therefore be more efficient to assign more resources to improve one's reaction time rather then decrease the lag time of the equipment to get the most results?

I would imagine that .064s lag compared to the the fastest lag in the market today is not that much of a difference. It might be easier and obtain this difference by training one's own reaction time than to spend the money on a camera with that kind of lag time.

I guess the biggest problem is for an individual to be highly sensitive to perceived lag but at the same time has a slow reaction time. For such an individual, what good would an improvement of .015s in equipment lag time be? Are humans even capable of perceiving a .015s time deviation?




  
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Sep 02, 2009 13:56 |  #41

MS-18E wrote in post #8570614 (external link)
Yes. Will it not therefore be more efficient to assign more resources to improve one's reaction time rather then decrease the lag time of the equipment to get the most results?

I would imagine that .064s lag compared to the the fastest lag in the market today is not that much of a difference. It might be easier and obtain this difference by training one's own reaction time than to spend the money on a camera with that kind of lag time.

I guess the biggest problem is for an individual to be highly sensitive to perceived lag but at the same time has a slow reaction time. For such an individual, what good would an improvement of .015s in equipment lag time be? Are humans even capable of perceiving a .015s time deviation?

Yes. .015s is percievable. I refer you to this thread for more on the subject:

https://photography-on-the.net/forum/showthre​ad.php?t=737722


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Skippy29
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Sep 02, 2009 14:03 |  #42

This whole thread is ridiculous :rolleyes:


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Sep 02, 2009 14:09 |  #43

twoshadows wrote in post #8566487 (external link)
.064s

That puts it about even with the 30D in terms of shutter responsiveness and slower than the 40/50D. So, a bit of a step backwards for action shooters in this respect.

Note: D300 shutter lag time = .045s, which puts it in the same league as the 1DmkII/1DmkIIn...

Edit: I have changed the line above to reflect the Nikon D300, as I originally intended. Sorry for the confusion :) .

So let me understand this fully.

You're unhappy that the 7D has a shutter lag of 0.064s. Which is even with the 30D, but slower than the 40/50D. According to Imaging-Resource, 40D clocks in at 0.062s. 50D clocks in at 0.063s.

So just so I understand this clearly. Your gripe is that it is 0.002s slower than the 40D, and 0.001s slower than the 50D, so therefore, it makes it significantly inferior based on these measured times?

*scratches head*

Sure, if 0.001% of the world's population can perceive 0.015s. But how many can perceive 0.002s?


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MS-18E
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Sep 02, 2009 14:25 as a reply to  @ jwcdds's post |  #44

Ok, I know the human mind is very good at defecting changes to their environment. So perceiving a speed difference of .0x sec is achievable. However, I do not think the brain is capable of measuring the magnitude of such small figures.

I guess more importantly, what I am trying to say is, there seems to be a greater return in training to improve one's reaction time than the lag time of one's equipment.




  
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epatt250
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Sep 02, 2009 14:26 |  #45

jwcdds wrote in post #8570733 (external link)
So let me understand this fully.

You're unhappy that the 7D has a shutter lag of 0.064s. Which is even with the 30D, but slower than the 40/50D. According to Imaging-Resource, 40D clocks in at 0.062s. 50D clocks in at 0.063s.

So just so I understand this clearly. Your gripe is that it is 0.002s slower than the 40D, and 0.001s slower than the 50D, so therefore, it makes it significantly inferior based on these measured times?

*scratches head*

Sure, if 0.001% of the world's population can perceive 0.015s. But how many can perceive 0.002s?

I would say you "almost" understand this fully. However you have not noted that in real world shooting conditions most people use focus. Shooting sports often means shallow DOF and being prefocused on a location that the subject is not at sounds like a risky tactic. Maybe then it might make more of a difference and would effect .001% of the shots of another .001% of the individuals who it would actually matter at all for.

I think most are in agreement that while using autofocus that this thing is lighting. So the actual lag with AF would probably yield faster real world results than the current options..

The thing is though, this is an internet forum with 2634 users reading at this very moment that I actually type. So you know there is going to be at least one in the crowd.


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