I was looking at the shutterspeed dial the other day and it occurred to me the most under used shutterspeed was 1/4000 sec or even 1/8000 sec.
Few of beginners and even professionals ever intentionally set those shutter speeds.
So while I have a class at La Sierra University I’m teaching the basics to, I came up with this idea to illustrate equivalent exposure at the same time make it fun and more exciting for my beginners.
Gear, Lighting conditions and Assumptions
As I was planning this demo/exercise, I had to make some assumptions of my student’s gear.
Since most of them have kit lenses, I had to base exposure on that.
- Fastest lens opening f5.6
- Conditions where we photographed outdoors and sunny
- Everyone’s camera had the capability of increasing ISO to 1600
No one in their right mind would be shooting above ISO 400 in the bright sun.
Occasionally a sports photographer with a slow long lens, might assuming they have body which gives low noise to high ISO images.
We were mostly concerned about being able to shoot with our fastest shutter speed of 1/4000 sec, so based on standard outdoors exposure at midday ISO 100 1/500 sec f5.6, we extrapolated to an equivalent exposure of ISO 1600 1/8000 sec f5.6 or 1/4000 sec f8.
I also selected a background that was darker or in shadow and suggested everyone position themselves so that our subject was backlit. Why?
Water is translucent and if it’s front lit, seldom shows up in picture very well, that’s why.
What’s left was recruiting a volunteer who wouldn’t mind getting a little wet and timing.
Since I was the one throwing the water balloons, I counted out aloud, “1, 2…3!” I release the water on the count of 3.
I need to work on my water balloon making skills. I was too conservative on some of those. They didn’t burst because they balloons weren’t close to capacity.
I also need to work on my throwing accuracy.
Thank you Jacklyn and Cesar for volunteering to take one for the team.