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Old Nov 8, 2004, 3:44 AM   #1
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I've just received the flash which I bought from Ebay (1 Euro + 6 Euros shipping from Germany to France)... and it seems to work perfectly... alone.

I plan to use it on my S7000 and my problem is "How to use it ?"

In auto or manual mode ?

What are the settings ?

Can the automatic operation (red and blue dots on the front face) of the flash work on my camera ?

Your help will be wellcomed and I thank all of you in advance.

Regards.
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Old Nov 8, 2004, 11:45 AM   #2
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First thing, the Vivitar 2800 seems has several versions, some with high trigger voltage. check with ths camera'a manufacturer to see if it's ok for the camera hot shoe.

http://www.botzilla.com/photo/strobeVolts.html

To use it , very simple, you put it on the camera horshoe, you have the choice of 2 modes:
1) manual : flash in manual , camera in manual, you calculate the GN thing and set your aperture
2) "auto" mode: you set the camera to the aperture corresponding to the flash setting, the flash will sptop at the right moment.

In both case, the set aperture + the choosen speed will determine the exposure of the scene not covered by the flash

------------
ah , this flash use the color dots thing instead of aperture labeling , see the manual , if you don't have the manual , see here:

http://homepage.mac.com/mattdenton/p...vitar_2800.pdf
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Old Nov 9, 2004, 3:52 AM   #3
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Well. I've tried some settings that seem to work fine. The best one seems to set the camera in "P" mode, white balance on "auto" and the flash in "M" mode. Inside shots, using the flash in bounce mode (light towards the ceiling), are of good quality. More infos to come when I try other ways of setting/shooting.

Considering the trigger voltage, the camera seems to deal correctly with it (still working after more than a dozen shots).

On this site the Vivitar 2800 is announced to be a possible flash for the S7000. I consulted it before buying.

http://www.gky.com.au/c/gky?a=da&did=19000000

The manual coming with the Fuji camera is very poor in information about using an external flash ;-((

Thanking you for your help.

Regards.
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Old Nov 9, 2004, 9:04 PM   #4
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Houlala wrote:
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Considering the trigger voltage, the camera seems to deal correctly with it (still working after more than a dozen shots).
hummmm ... IMO this is a bit dangerous presumption :?. If I were you , I would measure the trigger voltage and also check the permissible voltage level with the camera manufacturer aranoid:
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Old Nov 10, 2004, 12:18 AM   #5
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I would measure the trigger voltage
Maybe a good idea/precaution... but I don't know how to measure this voltage ? Using a multimeter ? Where to put the contacts ?

Could you help ?

Thanking you in advance.

Regards.
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Old Nov 10, 2004, 11:48 AM   #6
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Houlala wrote:
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Using a multimeter ? Where to put the contacts ?

Yes, but not the low impedance ones. An analog meter with 20k-50kOhm/volt is ok, or better , an digital multimeter (they are very cheap now)

There is a link in the above website
(To measure the trigger voltage of your own strobe, follow the instructions >>

http://www.botzilla.com/photo/G1strobe.html

look at the paragragh:
"How to Check the Trigger Voltage"

In short:

- power on the flash to full charge (ready to fire)
- meaure at the center contact and the ground contact of the hotshoe
(the flash should not fire when you take the measure)




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Old Nov 10, 2004, 1:22 PM   #7
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Thank you for your response. I'll do it as soon as I get a multimeter.

I'll keep you informed on the results of the measurement.

Regards.
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