sea often offers some panoramic vistas to be captured and you guys seems to be serious about photography and you all have some pretty cool modern DSLRs.
I am an old school
cinematographer, I.e. I learned exposing 35mm negatives on motion picture cameras arri 435 and panavision cameras. I feel compelled to share some tips with you all. If you already are a pro please forgive my 'extra' initiative, but it will help those who are new to photography or are about to invest in good expensive gears or even a manual SLR.
WHAT ARE F STOPS?
Often what happens because of the automation we tend to gloss over F stop readings.
The arithmetic is very simple. It's all about the number - 2. Yes, correct, and all your photographic values hover around numbers multiples of 2. If you can perfect this, then you will have no problem setting up your own Tstop on the camera
and not let the latter do it for you for more creative pictures.
We often wonder where did these camera
manufacturers got numbers like 2.8 and 5.6? Couldn't they have rounded it off? Well no. There is a logical reasoning behind
The iris/aperture of the lens Is round with many aperture blades. Number of blades depends on the build and the quality of the lenses. With each stop you open or close the lens, the area of aperture either doubles or halves, thereby doubling the quantity of light passing through or halving it.
Area =pi * r [square]
2, 4, 8, 16, 32, 64, 128, 256 imagine these are the areas doubled at every step or you can also say the quantity of light doubled at each step.
Now the square root of these figures above are the T stops
1.4, 2, 2.8, 4, 5.6, 8, 11(rounded off a bit ), 16
So it's about the square root of the number 2. The more you are adept with it, the easier it will be to run the numbers in your mind.
So on a bright sunny day your light meter or your ' through the lens' metering might read 16. (actually it will be a lot brighter 32 or 45 maybe ) So you set an exposure T stop at 16 to get an 'averaged' picture. What is an averaged picture? It's a different story.
If it is twilight and you want to take a picture of the anchorage, your light meter might read anywhere between 2.8 down to 1.4 depending upon the quantum of light available. You set your exposure accordingly.
And did I forget to mention shutter speed. Oh yes I did. The above two examples I quoted should be at a cinematic exposure speed of 1/50. Shutter speeds do play a very creative role in determining the look of images
Imagine, a little difference in frequency of PAL vs NTSC creates difference in looks.