Hilite, yellow fringe....?

crashtestmac

crashtestmac

Suspended / Banned
Messages
867
Name
Mac
Edit My Images
Yes
All,

I have a 5x7 hilight which i use a lot, last couple of shoots i have given up on the train because it slows down the process too much.

I have noticed on quite a few pictures that i am getting a yellow fringe around peoples hair and in the middle if there are 2 people in the picture.

Why is this, if i think hard.......
I used to just put 2 lights at the front and use one in the hilight but i have changed setup and now use 1 and 1, is it possible that is could be that the front lights are not strong enough, i am guessing not because the exposure is correct.

What could i have wrong, remembering that because it is a hilight you should only need about 30cm between it and the subject, or is that crap...?

Mac:shrug:
 
I am using studio flashes elemental ones. I have tried with a couple of 460 yukon ones as well and i think i saw the same...!

I am doing 3/4 shots rather than even offering full length, doing events i do not have the time to edit them, i only have 2 lights at the moment so when i get round to getting another i will go back to having full length as an option but i will put a sheet of perspex over it because it is a pain when it bunches up.
 
This is just a wild guess, but maybe you've set your white balance wrongly or have set it to 'auto'?
It should be set to the colour temperature of your light source, if you don't know the colour temperature of your lights or if your camera can't be set to the Kelvin value, either set the white balance to 'flash' or, better still, set a custom white balance.

If you colour temperature is set to 'auto' then it will be set to the colour temperature of the ambient lighting, which I think may have happened here. With the background overexposed it will look pretty white, but where light passes through the hair etc (an inevitable fault with this type of background) the light intensity will reduce to the point where colour temperature issues become obvious.
 
Garry you are a star, i bet that is it....!

I have seen it to varying degrees in different locations so it may be that, i think i changed to flash white balance a while back and i did not like the look of the pics on the LCD of the camera, i will try and set it to manual using the guide number of the flash heads as suggested.

Thanks
 
One more thing, would the fact that it is going through the hilite change the colour temperature at all...?
 
crashtestmac said:
One more thing, would the fact that it is going through the hilite change the colour temperature at all...?
Click to expand...
Any modifier will change colour temperature to some extent, but it shouldn't be enough to make a difference that you can actually see, even though the difference will probably be measurable.
 
I am at work so do not have access to the best example but it is like this.

Screen-shot-2010-09-21-at-10.44.09.png


It looks a bit more extreme because of the yellow belt but you can see it. It also a bit more obvious when it is printed out....
 
Well, of course there is a lot of yellow reflected from the belt but I can see the problem in other areas too.

The background is seriously overexposed and I think that my earlier suggestion, wrong colour temperature setting, may be right.
 
Like i say this is an old picture i have changed my style a bit since taking this one, Garry are you a believer in 1 stop difference or 2...?
 
crashtestmac said:
Like i say this is an old picture i have changed my style a bit since taking this one, Garry are you a believer in 1 stop difference or 2...?
Click to expand...
The minimum possible, which is usually somewhere between 0.5 and 0.7 of a stop. The closer the subject is to the background, the less overexposure you can get away with, and when you use this type of background the problem becomes even worse.
 
I would rather swap to "proper backdrops" and do it that way but this is a portable setup and a couple of times i have been glad that it is like that, i did an event where i could only just fit into the space and there is no chance that i would have been able to do it with paper or vinyl...

The pictures above were take in in an old church hall with magnolia walls. Nothing that should cause too much upset, but as i say this is a portable setup and i have seen it in other locations as well.
 
You must log in or register to reply here.
Back
Top