polariser advice

suselko · 02-20-2007

Hi!
I have a question about polarising filters that maybe one of you knows the answer to. (I haven't worked with polarising filters so far, hence my ignorance).
Inspired by some of the posts on this forum, I am considering mounting one polariser on my lens, marking edges with numbers, holding another polariser in my hand to check which setting is the best, and setting the one on the lens adequately. But i'm not sure if I had two polarisers of different make, would the result be OK? In other words, if we ignore the quality of glass, do different polarising filters show the same image? Or maybe I need two identical polarisers? Thanks for help,
Filip

alexz · 02-20-2007

There are apparently more robust solution of utilizing a polarizer on RF:
Check out FIlterView device on: www.photoequip.com - appears to be exactly the solution for RF. Do not have any personal experience neither relaiton to them, but will cnosider purchasing it as soon as will get into any considerable landscape shooting with my Leica.

jaapv · 02-20-2007

Yes that will work regardless of the polarizer. However a DIY solution like this will work easier:

suselko · 02-20-2007

thanks guys! I'm aware of the 77mm step-up ring trick, am only a bit put off by the price of such a big filter in comparison with 39mm (I'm going for B+W, they are pricey). But now I have a good picture

F

Michiel Fokkema · 02-20-2007

Hi,
I use two polarisers on my Bronica.
i engraved them both with numbers after checking the direction. Works like a charm. Afaik all polarisers work the same way.
On the Leica I use the universal swing out filter. Also works very well. if you can afford it.
Robert White also sells a solution for RF's.
Cheers,
Michiel Fokkema

sjw617 · 02-20-2007

I think I'm missing something here. You want 2 polarizers on the camera? Why? What are you going for?
If you put 2 polarizers at 90 degrees they will not allow any light through.

Steve

JohnL · 02-20-2007

Robert White (and maybe others too) sells a cheap polarizer by Tiffen that is mounted on a small handle like a magnifying glass that is great for evaluating polarizer alignment. It is graduated in degrees so you can quickly set the filter on your lens. Working with both a polarizer and a lens hood can be a bit of a hassle, though, with some configurations.

colinh · 02-21-2007

Quote:

Originally Posted by sjw617

I think I'm missing something here. You want 2 polarizers on the camera? Why? What are you going for?
If you put 2 polarizers at 90 degrees they will not allow any light through.

Steve

If you have only one polarizer in front of the lens you can't see what the effect will be (as you would with an SLR).

The second filter goes in front of your eye! You rotate it to get the effect you want, note the orientation, and set the same orientation on the lens filter.

All filters will act the same way (ie. light let through at 0 degrees and light blocked at 90 degrees. You can get a cheap filter for looking through.

And if you're using an external light meter remember that the filter basically blocks half of the light...

colin

sjw617 · 02-21-2007

AH.... Misunderstood the post. Thank you.

jaapv · 02-21-2007

Heliopan polarizers have a scale engraved on their edge.