Flash power vs f-stops equivalent?

Forums › Digital Imaging › Flash power vs f-stops equivalent?

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rayonline

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#1083779 7-Jul-2014 23:03

Yep, under the menu I can up and down compensation using TTL, AA flash modes or I can change the manual power yep. 1/128 power to 1 full power.

With the previous set of images.

The first set of those 6 pictures these are my settings. On the D600 I need to set up commander mode inorder to trigger my big flash wireless. Note that the pop up flash settings greys out when I set it to - -

Do the first set of images look correctly exposed to you? I have no idea. As you can see pop up flash is set to - - and group A which is my big flash on the brolly is TTL 0.0.

Those 4 other images which looked very dark are the following settings. I am assuming the pop up flash set to TTL -3.0 darkens the rest even when the group A is set to TTL 0.0.

rayonline

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#1083789 7-Jul-2014 23:12

I never actually use wireless TTL and ratios like you are, and when I do I use two big flashes, not the pop up. I have used it and it works fine in tests.

Where in the country are you?

Wellington.
Are you using a big flash on the hoteshoe as the commander? I only have one big flash so I use the D600's menu to set commander.

Yes, rear curtain disabled. Yes, the flash beeps after each time and the red color ready light is on.

Batman

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#1083790 7-Jul-2014 23:13

on the first set the first and last one is exposed ok.

the trick with flash is you don't want to see shadows in the picture (unless it's on purpose for a very creative shot usually a portrait close up).

timmay suggested you point the flash in a different direction

rayonline

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#1083792 7-Jul-2014 23:17

joker97:
timmay suggested you point the flash in a different direction

That's the first set image #5 (bounced wireless to the wall/ceiling). #6 ia hotshoe direct. #1 is brolly ISO 400, #2 brolly ISO 800, #3 brolly ISO 1600, #4 is brolly ISO 3200. All of the first set is when the pop up flash was set to - -

All the 2nd set of dark images was when they pop up flash was set to TTL -3.0 with the group A set to TTL 0.0.

Batman

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#1083798 7-Jul-2014 23:23

whatever works man, don't try too many iso. 400 or 800. i'd go 400. as i said i don't have a d800 so i cannot comment on what group does to your exposure. looks like you've figured it out.

another tip - if you bounce off ceiling look out for nasty shadow under hair fringe, eyes, nose, chin, ....

timmmay

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#1083837 8-Jul-2014 07:33

What part of Wellington? I can probably help you in person. We can compare how my gear works with yours.

rayonline

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#1083848 8-Jul-2014 08:31

Churton Park. We could meet somewhere ... :)

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timmmay

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#1083852 8-Jul-2014 08:38

I live one suburb away, Johnsonville. I'm between contracts at the moment so I'm reasonably available, but studying for something. Daytime or weekend, all we need is somewhere warm and dry.

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