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Olympus EM5 flash delay ?


Carabosse e2
11 39.5k 269 England
18 Jul 2012 11:45PM
No idea, Brian. Look forward to seeing more of your excellent bee and other insect macros.......... taken with flash where necessary! Wink

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brian1208 e2
11 10.4k 12 United Kingdom
18 Jul 2012 11:55PM

Quote:Auto flash delays can alter a fair bit depending on lighting and so on, I think you would be better off setting the flash for fill, less hassle


Paul, how many times before you hear me - I have tried using fill flash (read what I have said) I've tried using all the flash options and the only one that works for my bees in flight work is manual flash.

That works for me and I'm more than happy that others find they get the results they want using fill-flash or whatever suits them.

Strange as it seems, I have been using flash successfully for this style of photography for over 5 years and simply asked others if they saw what I did, ie: that was a difference between manual flash and other flash modes when using the kit flash on the OMD EM-5

The answer is, as has been demonstrated, there is more lag in modes other than manual flash - QED
Paul Morgan e2
13 15.7k 6 England
19 Jul 2012 12:24AM
Yes but not as much as half a second as you reported Brian.

Used correctly there is no more delay using the Olympus system than Canon, Nikon or anything else.
Carabosse e2
11 39.5k 269 England
19 Jul 2012 3:12AM
I suggest a bee contest. Smile

Paul can try a macro shot of a bee using one of the auto modes of the flash and see If it works.
rossd 11 1.1k England
19 Jul 2012 9:57AM
CB, do you ever sleep...... I mean you're on epZ at 3.12 in the morning????
Carabosse e2
11 39.5k 269 England
19 Jul 2012 11:13AM

Quote:CB, do you ever sleep...... I mean you're on epZ at 3.12 in the morning????


Sleep is over-rated. I make some of my most important decision in life in the early hours of the morning. Smile


.................................... probably accounts for a lot! Sad



Lol! Wink
mikehit e2
5 6.8k 11 United Kingdom
19 Jul 2012 11:28AM
Me too.
The problem is that I can't remember what they were when I wake up. All I know is that it was a very good idea. Sad
brian1208 e2
11 10.4k 12 United Kingdom
19 Jul 2012 3:29PM
I thought it may be helpful to collate the measured test results thrown up during this discussion (who knows, it may even help someone in future Smile

Josh's results, using manual pre-focus:


Quote:I've set the camera to manual focus, so all I'm measuring is shutter lag, from pressing the button to the picture being taken. I half press the shutter button, as that's how I always tend to take photos.

Flash off: 0.1 second or less to take the photo.
Auto flash: 0.2 seconds to take the photo.
Red-eye flash: 0.9-1.0 seconds to take the photo. (due to multiple pre-flashes)
Fill-In flash: 0.2 seconds to take the photo.
Manual flash (Full): 0.1 second or less to take the photo.

This was shooting in P, shutter speed 1/60 to 1/100, f/3.5, 14-42 MK I kit lens, Firmware 1.1 (body and lens)

These results are repeatable and consistent.



Imaging Resource results

Full Autofocus,
Center AF mode
Auto Flash Enabled
12-50mm kit lens
Time from fully pressing shutter button to image capture, with the lens already at the proper focal distance setting, Auto flash enabled.
shutter lag = 0.438 second

Prefocused
Auto Flash Enabled
Time to capture, after half-pressing and holding shutter button, Auto flash enabled
shutter lag = 0.190 second
Paul Morgan e2
13 15.7k 6 England
19 Jul 2012 3:35PM

Quote:Sleep is over-rated. I make some of my most important decision in life in the early hours of the morning


Yep this I believe, like taking a pee Smile
Paul Morgan e2
13 15.7k 6 England
19 Jul 2012 4:54PM

Quote:I thought it may be helpful to collate the measured test results thrown up during this discussion (who knows, it may even help someone in future


A lot of fuss over nothing Brian, just run a few test using the G2, the pre flash is so brief I found it impossible to time.

At the end of the day its down to user error, you can`t fault the lighting system, for macro your better off using a dedicated unit fit for purpose or switching to full manual.

In certain flash modes using the on board flash depending on light sometimes there is a pre flash sometimes there isn`t.

Also tested using one of my FL50R`s, again depending on settings and lighting, sometime you get a pre flash sometimes you don`t.

To guarantee no preflash set the flash to auto, not ttl and it fires every time without using pre-flash.

These onboard flash units are pretty basic and more difficult to control, preflash is more likely to happen in good light, not bad.
User_Removed 10 3.3k 4 United Kingdom
19 Jul 2012 5:24PM

Quote:preflash is more likely to happen in good light, not bad.


Your ignorance is astounding. Do you understand what a pre-flash is for?
Paul Morgan e2
13 15.7k 6 England
19 Jul 2012 5:29PM
Go away Smile

Of course I do
User_Removed 10 3.3k 4 United Kingdom
19 Jul 2012 8:08PM
I'm baffled then. Why is it (pre-flash) more likely to happen in good light not bad?
Paul Morgan e2
13 15.7k 6 England
19 Jul 2012 8:37PM
Because its trying to balance the light available along with the flash, move back inside I found no pre flash, just a single burst.

Strange but that`s what I found, looks like the reason for Brian missing his bee shots.

First time I`ve tried auto ttl in years Smile
User_Removed 10 3.3k 4 United Kingdom
19 Jul 2012 9:01PM
When you say 'move back inside', just to be clear, are you talking about it being darker inside at this point?

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