Exposure chart

What would happen if you set the camera like this: ISO 100 - f/32 - 1/8000sec? If you are an experienced photographer, you will answer that probably  if you use this combination you will get an underexposed picture. But for beginners, it is not always easy. So, I made the following chart: The difference between each number is one stop. You can print it and consult it, every time you want to set your camera...

The Helios Exposure Value Chart

OK. You understood what f/number is, what ISO is and what shutter speed is. Also, you can use ND filters occasionally. But when you have to find an equivalent combination between shutter speed - aperture - ISO it is not easy for you. With this chart it is! It gives you choices among the various aperture–speed-ISO-ND filter combinations that result in the same exposure. The only thing you have to do is add the helios that match each value to find...

Αperture

When a photographer says that he took a shot with f/5.6, he states about the amount of light that will pass through the aperture diaphragm, not about the size of the hole (entrance pupil). The same entrance pupil’s size does not implies that will pass the same amount of light if we refer to different focal length lenses. So, in order to could compare the amount of light in all lenses, we use the f/number which is a value that expresses the relative...