Originally Posted by
Mike Buckley
It's great to see photos that turned out so much better due to your control rather than luck. Your recent photos show a consistently higher quality.
About polarizers:
It's fine to leave the polarizer on when the sun is to your back and any advice to the contrary can be very misleading. (That assumes that the reduced amount of light entering the lens is not problematic.) It's not just the angle of the sun to your camera that is important; it's also the angle of reflected surfaces relative to the sun and the camera that are also important. That's because the light's angle of entry onto a surface is equal to the angle of exit. (There are two terms other than "entry" and "exit" that are usually used but I can't think of what they are at the moment.)
Though the sky probably won't be affected by the polarizer when the sun is to your back and though other surfaces may not be affected as much as in other situations, it's possible that some glare on the surfaces of shiny materials such as leaves can be somewhat minimized even in that situation.
Hold the part of the polarizer that screws onto the lens in your fingers without touching the other part. Alternatively, attach the filter snugly onto a lens. Then turn the element itself separately from the part that screws into the lens. That's the control that Manfred mentioned.
The results of that control are most easily seen when you point the camera toward the blue part of the sky when the sun is low and 90 degrees to your right. Turn the polarizer in that situation and you'll see the color of the sky magically change in your viewfinder. Similarly, avoid the sky and instead point the camera to leaves of grass or leaves on trees. Slowly turn the polarizer and suddenly at one point most of the "colorless" glare disappears, revealing the color and texture in the leaves.
The moral of the story is that you not only have to attach a polarizer to a lens, you have to turn the polarizer to a position that achieves the look that you desire. Your polarizer might have a white dot displayed on the part that turns after the filter is attached to the lens. Though I have never used the white dot, it is there so you can keep track of the position of the polarizer.
Two tips:
Remember not to use a polarizer on a wide angle lens when photographing the sky. Remember to use it when not photographing the sky.
When looking through the viewfinder or at the camera's LCD, always turn the polarizer counterclockwise. If you turn it clockwise, you may accidentally unscrew the filter from your lens.