Thunder_o_b
- #1
People from time to time ask why I use flash rather than just run the ISO up.
There are several reasons for this:
1. Grain increases as ISO increases. I normally flash at 640 ISO. This is a happy balance of grain and ambient light. Without flash I have to run the ISO to 2000 or higher.
2. Flash freezes motion. Even the fastest school fish can be captured with great clarity.
3. Without flash you are stuck with the light at hand. With flash you have a lot of control. With a twin head on 21" flex arms you have complete control if you photograph when there is no light pollution from the sun etc.
These shots were taken during the morning so you will see my reflection.
1. High ISO no flash. Uneven exposure. Burn out in the back, under exposure in the front.

2. 640 ISO twin flash.

3. But when photographing highly reflective fish you need to get the angle just right or you will suffer from hot spots as in this photo.

There are several reasons for this:
1. Grain increases as ISO increases. I normally flash at 640 ISO. This is a happy balance of grain and ambient light. Without flash I have to run the ISO to 2000 or higher.
2. Flash freezes motion. Even the fastest school fish can be captured with great clarity.
3. Without flash you are stuck with the light at hand. With flash you have a lot of control. With a twin head on 21" flex arms you have complete control if you photograph when there is no light pollution from the sun etc.
These shots were taken during the morning so you will see my reflection.
1. High ISO no flash. Uneven exposure. Burn out in the back, under exposure in the front.

2. 640 ISO twin flash.

3. But when photographing highly reflective fish you need to get the angle just right or you will suffer from hot spots as in this photo.
