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which filter do I need for ocean?


leica1215

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A pola filter kills reflection from non metallic objects if the light is at certain angles.

 

The result is more color saturation, not natural color. Can you get rid of it in post ?

Never tried.

 

UNless you have a 240, the only really practical model is a Leica Swing out model and it has to be 1980 or newer to provide neutral color casts. The older ones were not made for color and will tint the image. I suspect it can be removed in post because I have some cheap tiffins that impart a green cast on my Nikons. You can fix the raw in post if there is a nice neutral card in the pic or set up a special WB for the filter and use as one of the camera presets. Just do a custom WB of a WhiBal card with the filter in place.

 

No need to get a circular either. Linear is fine. But probably the only ones you can find that are linear are the cheap Tiffins and they produce the green cast.

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+3 on the polarizer. If you're using film, you'll need to experiment with different positions and even that will change with subject direction and sun angle. I usually just try to position the camera so that the meter reading varies greatest when I rotate the polarizer.

 

Here is a great tutorial:

 

Understanding & Using Polarizing Filters

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With polarizing sunglasses you can simulate the effect by turning your head.

 

I have bought a polafilter for my Lux35 (on a Ricoh GXR). It is not so very simple to find the optimum position with the LCD screen. One has to be patient.

 

For the sky it works very well (white clouds against a dark blue sky). But what is the natural color of the ocean: with filter green or without filter sun reflections?

 

You loose at least one f/stop, but in Italy this is no problem. This is even an advantage.

 

A circular filter contains of two filters. The incoming light passes a linear polafilter first, that increases the contrast, but polarizes the light. It leads the light (in the same filter mount) to a second filter, that depolarizes the light. The second filter does not change the contrast, giving the wished result (enhanced contrast).

 

My linear filter was (somewhat) more expensive than a circular one of the same size.:(

Jan

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