Guidance on the Chair Assignment Exposures

Question:
I’m having the worst time getting the exposure right for the chair assignment. At this point I’m just guessing when I choose the settings.

Answer:
Thanks for letting me know.

First we need to determine if you are you using your camera’s meter or the Basic Exposure Formula (also known as the Sunny 16 Rule)?

If you are using your camera’s meter, then push the trigger button down half way to see the meter reading. If the lit area is on the minus side of the scale at the bottom of your viewfinder, then you need to slow down your shutter, open your aperture and/or increase your ISO until your meter has the center line/0 lit up.

If the lit area is on the plus side of the scale at the bottom of your viewfinder, then you need to quicken your shutter, close down your aperture and/or decrease your ISO until your meter has the center line/0 lit up.

If you’re using the Basic Exposure Formula (BEF), then you need to determine which lighting condition your chair is in and dial that setting into your camera. As a refresher, BEF states that when you subject is in bright sun you aperture will be set to f/16 with your shutter speed set to your ISO. Put another way: 

BEF = F/16 @ 1/ISO on a sunny day.

Note: it is best if you can get your chair into a sunny spot or bright light. Here are some exposure settings for various lighting conditions with an ISO set to 100:

Chair is out in to the daylight with direct sun       – ISO 100,      f/16,   1/125

Chair is in hazy weather                                          – ISO 100,       f/11,   1/125

Chair is in bright overcast                                        – ISO 100,       f/8,      1/125

Chair is in open shade                                              – ISO 100,       f/5.6,   1/125

If your ISO can only go down to 200, then change the shutter speed to 1/250.

Hope this helps.

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