About three weeks ago, I started teaching photography at The Avon Old Farms School. We are just getting around to learning about the exposure meters and the interplay between shutter speeds, apertures and of course film speeds.
I think I can safely say that most people, even students of photography, fail to understand this dance. The newer, fancier, digital cameras apparently do all the “creating.” Sigh!
Here is an easy one – If you are at f/5.6 and your shutter speed is 1/125 of second, what should your shutter speed be set to for a similar exposure at f/4? Answer: 1/250 of second. Right?
Well, as I was trolling on Twitter today, I noticed a challenge posted by my friend Jonathan Canlas. He is a terrific photographer out of Utah and yes, he still shoots film. (Follow him on Twitter like I do – http://twitter.com/jonathancanlas/)
Here is his challenge: 400 iso f6.3 @ 30 sec = 800 iso f(X) @ 8 sec.
If you have no idea what those numbers mean, I recommend taking a course in basic photography. Could those of you seasoned pros out there perhaps solve this riddle? Give it a shot below in the comments section.
Keep in mind that we are trying to determine the aperture value here, or f-stop number. I’ll see if Jonathan will chime in to give us an explanation of how he came up with his correct answer.
I’ll send the first person to post the correct answer a little surprise, so don’t post anonymously.
Photography should still be fun, so if you feel stressed out about this little puzzler, take a deep breath and then tackle it. Go!