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Author Topic: Lee System 105mm Polarizer  (Read 1558 times)

stider

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Lee System 105mm Polarizer
« on: January 17, 2016, 04:24:50 am »

I'm looking into alternatives for the Lee brand polarizer here, but what I can't figure out is, if it matters if I am getting a 7.5 or 4.5mm.

I had heard that the slimmer the polarizer, the less vignetting there will be at wider settings, but I can't seem to find any explanation or reasoning behind this. One place suggested that this was due to the filter being closer to the lens. Well, in that case, shouldn't this Lee system be terrible, since it places the polarizer all the way down at the end of the other filters? And surely in that case, a few mm either way won't matter. Secondly, Lee claims that this setup actually allows for a MUCH greater range of polarization without vignetting. Not sure I understand that. Also, I always thought the problem with polarizing wide angles was in uneven distribution of light/color, I don't see how it could help with that.

In any case, I just need to know if there's any reason to select the wider or thinner polarizer, thanks!

Thanks in advance for your determination in passing the verification steps just to answer my post, seriously!
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davidgp

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Re: Lee System 105mm Polarizer
« Reply #1 on: January 30, 2016, 09:33:11 am »

Hi,

I'm using this filter system with an heliopan slim 105 mm polarizer in the front. I have my filter holder configured for two filters plus de polarizer in the front.

In my 5D Mark II, around 19" you start seeing the edges of the ring that holds the filter, more than the filter itself.

About that it is better to avoid nasty non-uniform polarization effects... I'm seeing them in wide angle images an clear sky, I don't know why LEE is saying that. Your problem will be reflectors between filters...

Regards

David


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sbay

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Re: Lee System 105mm Polarizer
« Reply #2 on: January 30, 2016, 11:34:44 am »

I'm thinking about getting the Lee 105mm landscape (slim) polarizer. From what I've read, it gives no vignetting on a Sony A7x to 16mm if you use the wide angle adapter ring (places the holder closer to the front of the lens). The regular polarizer (which is thicker) does vignette supposedly.

Depending on how many filters you need, you could remove a slot from the front of the lee holder to bring the polarizer closer to the front of the lens.

I have a 4x4 glass polarizer filter. This sits in one of the slots and doesn't have any vignetting for me. The only reason I'm thinking about replacing it is that it is chipped and scratched up.

davidgp

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Re: Lee System 105mm Polarizer
« Reply #3 on: January 31, 2016, 03:34:15 am »

I will have to recheck it... But with a 17-40 in a 5D using the 77 mm wide adapter I see the edges of the filter with two slots... But I will recheck...

I'm not using that much the system lately... But I like the two slots because it gives you the possibility of using a solid ND and a graduated one at the same time...


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sbay

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Re: Lee System 105mm Polarizer
« Reply #4 on: January 31, 2016, 11:54:20 am »

I suspect there is also variance depending on the exact lens model. With the sony 16-35FE @16mm I definitely cannot see the edges of the holder with 2 slots. I don't have my canon 17-40 anymore so I can't test that.

Personally I would just get the thinner polarizer and not worry about it. I don't think they cost any more.

davidgp

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Re: Lee System 105mm Polarizer
« Reply #5 on: February 01, 2016, 02:13:14 am »


I suspect there is also variance depending on the exact lens model. With the sony 16-35FE @16mm I definitely cannot see the edges of the holder with 2 slots. I don't have my canon 17-40 anymore so I can't test that.

Yes, I was thinking the same, probably the FE lens is shorter than the EOS one, for sure the distance to the sensor is... That will help seeing or not seeing the edges of the filter...


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