generic flash question

[redheat86]

Hi.

Flash is a Gemini 3000 or thats atleast whats writtin on the front.

I have this general flash that im using as a slave and was wondering from the settings on the back in manual mode..if its possible to change the power output?

thanks

http://geocities.com/homygray/flash.jpg

Sorry..updateed picture

[PacAce]

A tighter shot of the back would really help. As it is, it's really hard to make out the labels on the flash.

[Curtis N]

Or give us the make and model of the unit. Someone here could lookup the specs and answer your question.

[chtgrubbs]

Probably not. From what I can see, there are three setting Manual, Auto 1 and Auto 2. I don't see any controls which indicate output control.

[Todd Jacobsen]

Why would ISO be on the flash? Probably to help establish flash duration (longer for lower ISO) .

The top part has an f-stop scale (looks auto), another ISO scale as well as possible G/N scale that can be manually set.

It may be possible to use in manual but not sure why there are two different ISO setting locations.

Almost any flash can be set to fire, but your ability to manually control what comes OUT of the flash is another story...

[PacAce]

Hi.

Flash is a Gemini 3000 or thats atleast whats writtin on the front.

I have this general flash that im using as a slave and was wondering from the settings on the back in manual mode..if its possible to change the power output?

thanks

http://geocities.com/homygray/flash.jpg

Sorry..updateed picture
Unfortunately, it looks like you won't be able to vary the output of the flash in Manual mode.

Todd, the reason the flash has an ISO slider switch (the one on the flash body) is so that it can, in AUTO mode, adjust the amount of flash to put out before quenching it. Obviously, the ISO that's set has to match the ISO set on the camera.

The reason there are two ISO switches is because the one on the flash head itself is used in conjunction with the GN/distance table when the flash is set to Manual mode. The ISO switch adjusts the placement of the aperture vs distance scale of the table.

[redheat86]

Thanks for the info.

If i had an adapter to match the canon pins..is it possible to have this auto controled?

im guessing not but thought i would ask.

[PacAce]

Thanks for the info.

If i had an adapter to match the canon pins..is it possible to have this auto controled?

im guessing not but thought i would ask.
Depends on what type of Canon adpater it is. If it's just for the older TTL, then no, but if it's for ETTL, then it'll work just fine.

[NOTE: By "adapter", I'm assuming you're talking about those dedicated adapters that plug into the body of the flash, the part that replaces the hot-shoe foot. If not, then as long as the sync voltage is at or below 6 volts, you should be able to use the flash in auto-thyrsitor mode and manual mode. You just won't be able to use it in ETTL mode.

[Curtis N]

I use a slave adapter on an old Canon 177A speedlite. It generates different output in each of the two auto settings vs. manual. You might want to experiment with that. It may be difficult to get a quantitative comparison unless you have a flash meter.

[pierrot]

Your flash is a Vivitar and yes, you can adjust the amount of light emitted (flash duration) in fiddling with the ISO setting (body slider, not the one on the head as PacAce warned) ;)

The thyristor will let the flash last more or less, thus the "power output".

But don't forget to set the shutter speed at 1/60th on the camera body!