Chuck,
I took the challenge. I did some research online and found some
information, as well as instructions for testing the flash circuit voltage.
My Braun 2000/28BVC unit measures 20.5 volts with fresh batteries. I am
still searching for the Olympus specs on the camera circuit, but I suspect
it is around 12 volts.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, August 18, 2010 7:57 PM
Subject: Re: [OM] IMG: Applying Fill Flash
> The Braun might have a very high trigger voltage but... maybe not. Why
> not measure it. The E-510 manual doesn't give any high voltage warnings
> re using "unspecified external flash units" but does warn about possible
> interference from incompatible TTL and other electrical contacts.
>
> The Minolta A1 is spec'd for flash up to 400 volts. The Canon digitals
> (except for first two models: D30 and 10D) are spec'd for 250 volts. I
> suspect that the 510 can probably handle fairly high voltage as well.
> It can certainly handle a T-32 at 12 volts. You can probably buy a
> Sunpak 422D (with OM TTL foot if desired) for about $10-15. About 1/2
> stop less power than a T-32 but, unlike the T-32, has a 5 stop range on
> the manual exposure control.
>
> Chuck Norcutt
>
>
> Jim Nichols wrote:
>> Hi Dean,
>>
>> Thanks for the details of your flash setup. Alas, in my case, I am using
>> the flash that is built into the top of the Olympus E-510. I am afraid
>> to
>> use my old Braun Hobby flash with modern camera electronic circuits, and
>> have not yet found a need to spend for a compatible external unit.
>>
>> Thanks for the kind words about the image. It came from my first day of
>> experimenting with the flash unit outdoors.
>>
>> Jim Nichols
>> Tullahoma, TN USA
>> ----- Original Message -----
>> From: "Dean Hansen" <hanse112@xxxxxxxxxx>
>> To: <olympus@xxxxxxxxxxxxxxxxx>
>> Sent: Wednesday, August 18, 2010 10:39 AM
>> Subject: [OM] IMG: Applying Fill Flash
>>
>>
>>> Jim recently posted:
>>>
>>> "I decided to try using minimum fill flash in closeup shots outdoors.
>>> In this case, it helped the flower considerably, but washed out the pale
>>> Clouded Sulphur Butterfly. With darker subjects, it appears to work
>>> better.
>>>
>>> http://gallery.leica-users.org/v/OldNick/Total+Immersion.jpg.html
>>>
>>> The butterfly was immersed as deeply as possible in the deep-throated
>>> bloom.
>>>
>>> Comments and critiques welcomed.
>>>
>>> Jim Nichols
>>> Tullahoma, TN USA"
>>>
>>> For many of my butterfly shots, I use a T-32 flash mounted on a
>>> Bogen "Magic Arm," and I can put the flash a foot or more away from the
>>> camera. I like to have the T-32 well above the axis of the camera lens
>>> (usually a Tammy 60-300 on the OM 65-116 auto extension tube) and in
>>> front of the lens, and pointing downward. This lets the fill flash hit
>>> the butterfly's wing at a very oblique angle, and this oblique angle
>>> both reduces the "washed out" exposure that an axial flash will give and
>>> helps bring out the veins and details in the wings. In Jim's shot, the
>>> sun appears to be coming from about 1 o'clock, judging from the shadows
>>> on the leaves. The fill flash leaves a slight shadow of the left wings
>>> on the upper side of the right pair of wings. Where's the flash
>>> located, Jim? It seems to be coming from below the axis of the lens.
>>> Using axial flash with butterflies, whether reduced or not, will, I
>>> feel, decrease detail in the wings and, too often, give a washed out
>>> exposure. This is much less likely with an off-axis flash. (I know
>>> I've explained this before.)
>>> Exposure of the flower and leaves is very nice. Overall, an
>>> interesting shot. Actually, it's maybe the first time I've liked a shot
>>> that doesn't show the whole butterfly. The next step in this direction
>>> will be to photograph a bumblebee gathering nectar or pollen from a
>>> closed gentian--the bee forces the closed petals apart to enter the
>>> flower, then it totally disappears inside the bloom, which closes up
>>> again while the bee is feeding. I took a Super 8 movies film of a
>>> closed gentian "giving birth" to a bumblebee as it backs out of the
>>> closed flower. This always brings a laugh from an audience.
>>> Dean
>>>
>>> --
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>>>
>>
>>
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>
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