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test your lag
This is a way to test your reflexes and shutter lag. just for fun. Enjoy.

Http://www.shooting-digital.com/.../schwartz/shutter_release_test/default.aspSince I learned, shooting with film,... I think negative!..

Comments (8)

I find as I approach my mid 60's that lag is becoming a way of life. It gets tested every time I walk out the door..

OH WAIT... you're talking about shutter lag! Never mind. Jerryhttp://www.jbellphotography.com..

Comment #1

Ledittmar wrote:.

This is a way to test your reflexes and shutter lag. just for fun. Enjoy.

Http://www.shooting-digital.com/.../schwartz/shutter_release_test/default.asp.

The resolution on the "clock" is 1/3 second. Almost 100% of cameras have shutter lag less than that!.

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #2

Much of the lag is bad timing by the operator! (pressing the shutter button at the precise time the arrow is at the top.)Since I learned, shooting with film,... I think negative!..

Comment #3

Ledittmar wrote:.

Much of the lag is bad timing by the operator! (pressing the shutterbutton at the precise time the arrow is at the top.).

That's true too. In general, a human can press a button within 0.200 seconds of an event. But I suspect you missed my main point?.

Watch the "clock" and you will see that the hand moves in 0.333 second jumps, therefore even if I as a human am PERFECT and press the shutter EXACTLY when the hand is at the top, the best this test can tell me is that my shutter lag is less than 0.333 seconds. Actually, my shutter lag is 0.007 seconds, which is MUCH too fast to test by hand. Even a slow dSLR will have a shutter lag of about 0.150 seconds...still too fast to test this way!.

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #4

Chuxter wrote:.

Watch the "clock" and you will see that the hand moves in 0.333.

Second jumps, therefore even if I as a human am PERFECT and press theshutter EXACTLY when the hand is at the top, the best this test cantell me is that my shutter lag is less than 0.333 seconds..

Somebody's math or observations need checked. The "hand" is moving 180 degrees/sec. If it is moving in 0.333 sec. jumps that would be 60 degrees per jump. Easy visual observation will disprove that. Using a slow shutter speed it can be seen that it is moving in .05 sec.

Enough to distinguish between the pack leaders and also rans in the among P&S cameras..

By the way, would you like to test your DSLR with both auto-focus and auto exposure turned on..

A. C...

Comment #5

It's quite a good indicator. I just pointed a pre-focused Canon s400 at it and then a pre-focused Fuji 9100. As expected the older camera had twice the lag..

John.Please visit me at:http://www.pbase.com/johnfr/backtothebridgehttp://www.pbase.com/johnfr..

Comment #6

Oops! A case of migrating decimal point. I meant 0.033 seconds per jump. Sorry....

I think your idea of using a slow shutter speed is good. I used it to show that the jump interval is actually 0.04 seconds. I also noticed that there is a tiny delay when the hand returns to the top...it "hangs" there for a brief time. The clock is a Flash application, so it's like a movie with frames that record a 360 degree rotation of the hand. When it finishes, it restarts again, but there is a bit of time required, thus the small delay at zero..

I took your challenge and timed my camera w/o prefocusing. I did it 3 times and got 0.58, 0.62, and 0.62 seconds...so averaging this, I guess my total lag is about 0.607 seconds...under these conditions. My screen is not too bright. I used 1/50 second at f:4.0...that's typical indoor illumination levels. Outside in bright sun, I use something like 1/500 @ f:8.0. In these conditions, the total lag is about 0.3 seconds..

So that's another limitation of this test: It can't simulate bright ambient conditions..

But it is cute..

What I have done is to use a record turntable to test for these lags..

1. Set the speed to 45 RPM2. Tape a paper strip with black lines every 10 mS2.a. My platter is 12 3/8" in diameter2.b. Which has a circumference of 12.375 * 3.14159 = 38.877".

2.c. At 45 RPM (0.75 Rev/Sec) it's circumferential velocity is 12.375 * 0.75 = 29.158 IPS2.d. Thus it moves 0.292" per 10 mS3. Make the first line higher to indicate "zero"4. Tape a paperclip to the base of the turntable to use as a pointer5. Take a picture when the tall line passes the paperclip.

This setup and procedure should allow you to interpolate to a mS. And you can locate the turntable in different lighting..

Acsmith wrote:.

Chuxter wrote:.

Watch the "clock" and you will see that the hand moves in 0.333.

Second jumps, therefore even if I as a human am PERFECT and press theshutter EXACTLY when the hand is at the top, the best this test cantell me is that my shutter lag is less than 0.333 seconds..

Somebody's math or observations need checked. The "hand" is moving180 degrees/sec. If it is moving in 0.333 sec. jumps that would be60 degrees per jump. Easy visual observation will disprove that.Using a slow shutter speed it can be seen that it is moving in .05sec. jumps.



By the way, would you like to test your DSLR with both auto-focus andauto exposure turned on..

A. C..

Charlie DavisNikon 5700 & Sony R1HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/..

Comment #7

With pre-focus on my s9100.

I could make it hit the 0 press the shutter all the way down on the dash just before the 0..

If I press the shutter right on the 0 it usually ends up just before the .1..

Without pre-focus it's about .3Fuji Film S9100s9100/s9600 Flickr Group:http://www.flickr.com/groups/37994085@N00/..

Comment #8

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