Please help me with my new flash

Started Jan 28, 2004 | Discussions thread
Alan Mitchell New Member • Posts: 9
Thanks, Jose and Pinhole!

Amit Chugh wrote:
@PinHole & @Jose

Thanks for all your input. I will try each one of your suggestions
one at a time and post back my result here.

@PinHole

Your theory of flash compensating the 1 stop appears more correct.
However how much of it applies in practice will be known shortly
once I go back home and test it. Yes, I am living in an appartment
with low ceiling. I never measured it but I looks pretty low. I
will measure it also. To get the feel of how far 3 meters from the
subject is, I will measure that too so that when taking real
pictures I have an idea how far I am away from the subject.

Can't wait to get back home and try all this. Talk to you guys
pretty soon.

Once again thanks for the help. I will post my results back on this
same thread so that others can get some help too.

-Amit

PinHole wrote:

You may be losing one F value to the ceiling when bouncing flash,
but the flash is compensating for this with more power by metering
the light reflected back from the subject. Therefore I don't think
it is correct to use a lower F-stop value on the camera than the
flash. If the flash is set to F 5.4, then put the camera in manual
mode and set the aperture to 5.4 and set the ISO to 100 so it all
matches. This is true whether you are using direct flash, any
lumiquest configuration or bouncing from the ceiling.

Now there are only two variables left to set. One is the shutter
speed, and this is not such a critical value with flash
photography, but you can experiment and find something that gives
good results. Start out with 1/125 or faster and see how that
works. Experiment up to about 1/1000. The other variable is the
bounce angle. You need to consider how high your ceiling is, what
color it is and how far from your subject you are. If you have a
normal residential ceiling height of 2.5 meters from the floor, the
ceiling is white and flat, and you are about 3 meters from your
subject, then you should be bouncing off the ceiling at about 90 or
75 degrees as indicated on the flash's bounce angle indicator. If
you have a significantly different ceiling geometry, you are on
your own.

You should be aware that this is a powerful flash and you may not
be able to avoid overexposure at close range with the flash pointed
directly at the subject. For this reason is also might be smart to
disable the auxiliary fill flash until you get this sorted out.

If you do not have strong backlighting and are still not getting
good exposures, then make sure that the meter on the front of the
flash is not obstructed in any way. Also make sure that the
camera's flash settings in the menu are set to normal (I think the
V1 has such a setting). If this still doesn't work, then there may
be a problem with the flash.

Oh yeah: of course I am assuming you have fresh high-quality
batteries installed in the flash and you are allowing it sufficient
time to charge between flashes.

Thanks for the fine discusiion and graphics- this is a help to many.
Alan

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