To use a faster shutter speed you have to adjust your exposure to match the light output for FP bulbs. It works the same as for ambient light. You can use FP bulbs at any shutter speed with a Focal Plane shutter if you take this into account.
At 11:56 AM 2/24/2003 -0500, you wrote:
Mat Maessen said:
> Since a flashbulb takes a little bit of time to actually fire up to full > brightness, the camera fires it off before the front shutter curtain is > fully open. If you find an instruction manual for the camera, you'll > probably also find that the flash sync speeds in the FP position are > slower than for the X position, since a flashbulb burns for longer than > an electronic flash fires.
Ah, that might explain the problem I had with flash bulbs in a Tilt-A-Mite that I was using on my K1000. It was nothing important, I was just trying to find a guide number for those bulbs and outdoor use. But... I think it was about the right half of the pictures were underexposed. I'm sure I used 1/30 second, and the electronic flash pictures I took to calibrate an electronic flash turned out fine. I took notes, they're at home.
I haven't used the flash bulbs since, I was waiting for warm weather before I went outside and tried again to figure them out and calibrate them.
Outside of a dog, a book is man's best friend. Inside of a dog, it's too dark to read. --Groucho Marx
