Pre-Flash TTL - Is a flash method that shoot out a signal to measure how much power the camera to set for flash.

ADI (support direct flash only)- if you use bounce it will revert back to TTL automatically .

This post has been edited by Ahmike: Mar 29 2009, 04:56 PM

SpOOkY: Aiya, everybody is pointing you in the wrong direction with bouncing instead of adjusting shutter speed...

If you're in P or A mode the shutter speed will never be slower than 1/60s unless you're using slow sync flash mode.

About bokeh in daylight with flashes

If you want to shoot with a F1.4 lens while using flash, in bright daylight, the shutter speed will only be as fast as the flash sync speed which is 1/125s* in the case of A100/A200/A300/A350 bodies. So in daylight F1.4 lenses will cause a shutter speed of maybe 1/4000s even at ISO100. The shutter speed will blink then because of extreme overexposure.

So that's where HSS comes in, but only if your flash is pointed straight or used wirelessly. It pulses the flash to overcome the flash sync speed of the camera so you can use flash at 1/8000s. However because it's pulsed the power decreases significantly.

* 1/160s if Super SteadyShot is turned off

** why does HSS need the flash to pulse? Because the shutter is never fully open. There are 2 curtains in a shutter. When you press the shutter, the first curtain goes up, the sensor is fully exposed, then the second curtain goes up to cover the shutter. Then both curtains come back down. However the curtains have a speed limit, and at faster shutter speeds, the first curtain may be going up and then the second curtain has to quickly follow behind it. So the sensor is never fully exposed; instead a moving 'stripe' of exposure happens.

The flash only flashes once when HSS is off but when doing HSS it has to pulse to cover these 'stripes' of exposure.

Somebody on Youtube did a really good animated example of how HSS works (video always works better!):

http://www.youtube.com/watch?v=EUbzXRVZejA

Here he talks about Auto FP which is the same as HSS.

A100/A200/A300/A350 flash sync speed = 1/125s with SSS on, 1/160s with SSS off
A700/A900 flash sync speed = 1/200s with SSS on, 1/250s with SSS off

sidewinderz: Refer to my reply to SpOOkY; when the flash uses HSS it will pulse and decrease power. So the flash doesn't have enough power to bounce which is why it disables HSS when in bounce mode.

You may want to change flash exposure when shooting very close subjects or shiny objects.

Congratulations Seng_Kiat!

wow...thanks bro albert!!!
so, now i know that i need to use HSS in daylight to get the bokeh effect right:)

btw, i`m still quite lost on controlling the flash, i am using auto-mode and realized that the exposure is not well controlled though...

hence i always switch to M(camera) mode while using flash. I also realized that the xposure bar is neglected adi...no matter what shutter speed i use,i will get almost the same exposure because the flash has compensate it(correct?) meaning that camera expsoure will not affect the picture when flash is intact.

my question is i`m not getting the right exposure throughout the whole picture with flash on. for isntance, i was shooting at dark env and i only have my subject well lit. i also relized that i cant control the speed of the flash, (i duno if there is a flash that can contorl it) the flash speed seems to be following cameras shutter speed...

i did a few test, in order to capture more background, i need the shutter to be opnend longer so what i do is, i will still use auto (power & zoom) on flash but i will reduce my camera to 1/20 in order to get the background well lit...is that the only way?

any webbie to recommend to learn how to bounce wall? i realized a lot of restaurants ceiling are black or damn high up...hardly can bounce and i dont have a diffuser...should i get a dome?labency?or bounce card?

cant load youtube sigh...do it tmr!
sorry for a lot of quesition..
thanks
i tried diffuser for canon 430 and it fits f42 but that guy is selling for 129...siao!

This post has been edited by Sp00kY: Mar 29 2009, 07:56 PM

harlo guys..finally found a connection in korea...lol...freaking !@#$%$ cold...zzzz

anyway...i think i might hav to send my 50mm for service..sigh..i realise 90% of the picture out of the lens r blurred....hai.. =(

1)Increase ISO will help to capture ambients light also.
2) Search for a betterbouncecard or in alphanatics DIY got it also for alt diffuser.
3)Here this might help you to learn about flash http://www.youtube.com/watch?v=One9CMWJQzI

This post has been edited by Ahmike: Mar 29 2009, 09:36 PM

Got see any korean artists?

Sifu sekalian, C&C is appreciate.. i found that my picture looks very noisy.
Can let me know what setting should i use?

Faster shutter speed?

ah mike, thank u, will see it tmr:)

weigie , it looks blurry rather than noisy to me

Wahlau my fren.. you using 1/30 F20 ISO100 eh...

Just put to Aperture Priority F8 then let the cam select the shutter...

This post has been edited by Ahmike: Mar 29 2009, 09:48 PM

Aikz.. still noob ma.. 2nd time post a photo at here..don noe wat to use.. can tell me wat setting should i use?

Spooky. i have no idea wat setting should i use and its look blurry and noisy.

This post has been edited by weigie: Mar 29 2009, 09:49 PM

Put la at least 1/320. Lol

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Added on March 29, 2009, 9:48 pmor 1/250.

This post has been edited by Kul | Mo0: Mar 29 2009, 09:48 PM

Weigie... try learn to use Aperture Priority and Shutter priority before going into full manual

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Added on March 29, 2009, 9:51 pmWeigie... try learn to use Aperture Priority and Shutter priority before going into full manual

This post has been edited by Ahmike: Mar 29 2009, 09:51 PM

erh, wana capture car u need pretty high shutter speeed...no worries, we are all here to learn and teach and share...

try using A mode which gives will give u a better understanding on shutter/aperture etc

Well i started using M mode. And i wasted my 1st 100 shots experimenting. LOL.

pic spam....



welcome to C&C

thanks

This post has been edited by cjlai: Mar 29 2009, 09:58 PM

Well. i did try to use A mode. but i would like to get some effect that the car is moving. So, i try to use M mode. and the result are blurry and noisy .. Try to learn and shot again by tmr.

@ahmike - will try to learn from A and S mode first. thanks

This post has been edited by weigie: Mar 29 2009, 10:00 PM

Well if want the moving car part. Maybe not 1/30 la. 1/80 maybe?

That's what we call panning. Easy way is to set to Shutter priority, set to 1/15 - 1/30 for shutter speed and change the auto focus mode to AF-C. Snap the pic while focus the car and follow the car movement after you hit the shutter.

r u trying to do panning????

search youtube or any online tutorial..im sure there r lots of them out there....

like wad others said..ur aperture is wrong..if u wanna do panning..maybe u shd try shutter priority...and get closer to the road..to many messy stuff inside...

okie..time to go back hotel..see u guys..