From: utzoo!decvax!duke!harpo!ihnp4!ihuxk!rs55611 Newsgroups: net.rec.photo Title: Re: RE: How to use a flash Article-I.D.: ihuxk.270 Posted: Thu Jan 20 15:48:45 1983 Received: Sun Jan 23 07:34:16 1983 Reply-To: rs55611@ihuxk.UUCP (Robert E. Schleicher) References: ihuxm.152 houxz.250 ihuxf.184 Several people have recommended using bounce flash (tilted flash head) as a means to eliminate "redeye", mentioning in their responses that there is a loss of flash intensity that must be compensated for. Some clarification is needed. First, with automatic flashes, no compensation is needed, as the light coming back to the flash sensor has already bounced off the ceiling, and is therefore already less intense. Thus, the flash (or the camera, in the case of TTL flash metering, as on Minolta x-700) will automatically adjust for the bounce flash. The thing which you have to be aware of is that the maximum flash to subject distance over which the auto-flash will work properly has been reduced. Most auto-flashes with bounce heads have an indication on the table on the back of the flash which shows maximum distance as a function of film speed (this also shows the appropriate aperture for each film speed). This table will often also show a reduced maximum distance when using bounce flash (automatic mode only) Aperture compensation at the camera is only needed for manual flash mode. Another warning: Pictures taken with bounce flash can be discolored if the surface that the flash bounces off of (prior to getting to the subject) is colored. Thus, bounce flash off of a white ceiling works, while bouncing off of a painted wall (holding the camera vertically, for instance) will cause coloration. (Off-white ceilings give a nice warming effect.) Diffusers placed over the flash head avoid this, and will also be automatically compensated for by auto-flash operation. Bob Schleicher ihuxk!rs55611