Canon 30D - Manual (Page 18)

Page 18 of 35 © Ken Rockwell 2006
THE CUSTOM FUNCTIONS
The default setting is "0" for each.
01: SET function when shooting lets you have the SET button do something
helpful while shooting. These are cool; they give you instant access to your
choice of a function, skipping a few clicks. I use the Change Quality setting.
Options are:
0: Nothing. The 30D ignores the SET button while shooting.
1: Change the Quality setting. You have to look at the top LCD.
2: Select a different Picture Style.
3: Call up MENU (duplicates the MENU button).
4: Replay the image.
02: Long Exposure Noise Reduction. This means after an exposure of a
second or longer, the 30D makes a second exposure as long as the first,
except with the shutter closed. The top LCD blinks BUSY during this second,
dark, exposure. The 30D then subtracts any noise, fog or hot pixels seen in
the known dark exposure from your image.
I never use this. I hate waiting, and I especially hate waiting for double-long
exposures for this to finish. Use it only if you see fog or hot pixels and then
only if it improves them.
03: Flash Sync in Av Mode.
0: Auto: the shutter speed remains as set for a good ambient exposure.
I use this.
1: 1/250: It locks the shutter at its fastest 1/250 sync, making the
backgrounds dark or black.