brenthutch 388 #1 May 21, 2003 Why can't I add fill flash without the shutter speed automaticly dropping to 1/90? What is the best way to add fill flash to eliminate shadows and brighten colors? Quote Share this post Link to post Share on other sites
zaGURU 0 #2 May 21, 2003 Wich camera have you got? every camera has a sinchro-flash speed, going from 1/90 up to 1/300... it depends on the model. Fill flash is the best way, and better if you use a diffused light, by putting a diffuser in front of the flash. check out my web site, many pictures with fillflash at 1/250._____________________________________________ Roberto Mettifogo, Photographer - Cameraflyer www.robertomettifogo.com Quote Share this post Link to post Share on other sites
quade 3 #3 May 21, 2003 QuoteWhy can't I add fill flash without the shutter speed automaticly dropping to 1/90? Shutters are composed of two major parts; a first curtain and a second curtain. Before you trigger the shutter, the first curtain is over the film and the second curtain is tucked away. Triggering the shutter pulls the first curtain away, exposing the film, and after a certain period of time the second curtain covers in up again. For very short exposures, the second curtain starts its' movement before the first curtain has completely uncovered the surface of the film. If you could watch this in high-speed, it would look like a little opening slit moving across the surface of the film. The exposure time that is the fastest the camera can trigger the two curtains AND still have a full frame exposed is called X-Sync. If you triggered a flash at X-Sync or slower, then the entire piece of film would be exposed. If you were allowed to trigger a flash at a shutter speed faster than X-Sync, then only part of the film would be exposed because only a part of the film, maybe just a little slit, wouldn't be covered up by the curtains. Very expensive cameras are made with very fast curtains and can therefor have higher X-Sync speed. Very inexpensive cameras have fairly slow shutter curtains and therefor have pretty slow X-sync speeds. As always the basic laws of engineering apply. Of the three qualities you want in anything; Good, Cheap or Fast, you can usually only have two. More stuff about Canon Flash than you ever thought possible available HERE.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
bmcd308 0 #4 May 22, 2003 That is your maximum synch speed - the fastest speed at which all parts of the film are exposed at the same instant. If you go to a faster shutter speed, the shutter starts acting like a slit that moves across the film, and the instantaneous flash will therefore only appear in a portion of the scene. BMcD... ---------------------------------- www.jumpelvis.com Quote Share this post Link to post Share on other sites
zaGURU 0 #5 May 23, 2003 Why can't I add fill flash without the shutter speed automaticly dropping to 1/90? 1/90 is the maximun synchro speed possible in your camera.._____________________________________________ Roberto Mettifogo, Photographer - Cameraflyer www.robertomettifogo.com Quote Share this post Link to post Share on other sites
