Cokin P filters on LF?

olleorama · Feb 22, 2010

Hello, I have to get some filters soon. Tired of burning in skies. I need filters both for my MF and LF lenses. All my lenses can in theory all mount the cokin P filter system (<82 mm filter thread). Will this system cause vignetting? Or even worse, will the lenses explode?

I can't see how it could cause vignetting, but you guys usually have good input.

thanks.

djhopscotch · Feb 22, 2010

I use the P system on a Nikkor-W 210mm for 4x5 as well as for my RB-67 system. My widest lens i use it on is the 65mm on the RB-67 and i do not have any problems with vignetting.

olleorama · Feb 22, 2010

djhopscotch said:
I use the P system on a Nikkor-W 210mm for 4x5 as well as for my RB-67 system. My widest lens i use it on is the 65mm on the RB-67 and i do not have any problems with vignetting.

Thank you. I too have a 210 for the 4x5" and a RB67. Have you found any cheap polarizers that fit the P system? Cheap as in china made ebay version.

djhopscotch · Feb 22, 2010

olleorama said:
Thank you. I too have a 210 for the 4x5" and a RB67. Have you found any cheap polarizers that fit the P system? Cheap as in china made ebay version.

I use a Cokin linear popularizer that i got used off KEH, i don't use any ttl metering so the circular polarizer was unnecessary. It was only like $14.

Rick A · Feb 22, 2010

I have both the A and P , and I dont think it will work without some vignetting. Even though it will fit up to 84mm threaded rings, the inner circle of the adapter itself is 76mm. while the filters are 84mm square. I think you are better off going with Lee or Chromatek systems. Some of their items interchange (size wise)with each other. I just recieved some literature from Chramatek a couple of weeks ago, and their equiptment looks to be first rate. You can check them out at Spaphoto in the UK. www.spaphoto.co.uk Anthony is a good guy to deal with, prompt and knowledgable chap.

Rick

olleorama · Feb 22, 2010

djhopscotch said:
I use a Cokin linear popularizer that i got used off KEH, i don't use any ttl metering so the circular polarizer was unnecessary. It was only like $14.

Can you please explain? A circular polarizer is two polarizing glass sheets which can be turned in relation to one another, and a linear polarizer is what? I take it you can just 'polarize' light in 90 degrees increments? Or do you turn the whole filter adapter? If so, how does it work with gradual filters? I guess I need to read a bit on filters.. I have only used them for 35 mm, and I haven't frankly been so thorough.

Why is CPLs only necessary for ttl?

djhopscotch · Feb 22, 2010

There is a good explanation here:

http://www.luminous-landscape.com/tutorials/polarizers.shtml

olleorama · Feb 22, 2010

ralnphot said:
I have both the A and P , and I dont think it will work without some vignetting. Even though it will fit up to 84mm threaded rings, the inner circle of the adapter itself is 76mm. while the filters are 84mm square. I think you are better off going with Lee or Chromatek systems. Some of their items interchange (size wise)with each other. I just recieved some literature from Chramatek a couple of weeks ago, and their equiptment looks to be first rate. You can check them out at Spaphoto in the UK. www.spaphoto.co.uk Anthony is a good guy to deal with, prompt and knowledgable chap.

Rick

Thanks, I've read about cromatek, but they are one order of magnitude more expensive than cokin P. I appreciate the input though.

Does cromatek have an official homepage?

olleorama · Feb 22, 2010

djhopscotch said:
There is a good explanation here:

http://www.luminous-landscape.com/tutorials/polarizers.shtml

thanks. got it.

Rick A · Feb 22, 2010

olleorama said:
Thanks, I've read about cromatek, but they are one order of magnitude more expensive than cokin P. I appreciate the input though.

Does cromatek have an official homepage?

They are at www.spaphoto.com.uk I think they are well worth the extra pesos

Rick

fschifano · Feb 22, 2010

I use the Cokin P filters, and even the Cokin P series polarizer on large format with a 150 mm lens, on 6x6 with a 50 mm. lens, and even on 135 with a lens as short as 24 mm. No problems with vignetting.

AnselAdamsX · Feb 22, 2010

I've used P series filters on 90mm for 4x5 no problem with vignetting.

Chris

ras351 · Feb 22, 2010

Please note that I use the Lee system but whether or not you get vignetting will depend on more than just the filter size and focal length of the lens. For example you might find that for LF which is typically used with small apertures you don't get vignetting but on a fast MF lens fully open you do. Obviously the number of filters/slots and whether or not there's a round polariser attached to the front also has an impact.

If you really want to be sure I'd suggest you get a piece (or more) of cardboard and cut a hole which is the final size of the filters you anticipate you'll use. Stack enough cardboard so that it's the same width as your filters will be. Attach this to the front of your lens with some rubber bands, open up the back (or take off the ground glass), set the aperture to what you anticipate you'll use, trip the shutter on a bulb setting and look through the corners from the back of the camera to see if you can see the edge of the filters. If it's clear you won't get vignetting but if it's obscured you'll either need to use a smaller aperture or a larger filter size (or use it for artistic appeal like a Holga).

Roger.

Monophoto · Feb 22, 2010

I use Cokin P filters on my LF.

I don't use a lot of filtration - some yellow or yellow-green, sometimes a grad filter, either gray or something to increase sky contrast. Cokin is reasonably priced, and a set of filters is compact enough and light enough to not be a burden to schlep around in the bag. No problem with vignetting on my 210; I had some experience using them on my 90mm f8, but not enough to make a generic 'no problem' comment.

grahamp · Feb 23, 2010

I use a Cokin P holder and hood sections on lenses up to 77mm (my 90mm wideangle on 5x4). In fact I use it as a cheap substitute to a compendium hood most of the time. I do have a P polarizer (it is round, and rotates in the holder) though I don't use it much. I mostly use yellow/green or green screw filters for landscapes.

I rarely need to burn in skies except for effect. I get a decent tone for blue sky without filtering. I used to get blank white skies when I underexposed/over developed my film. I was young and foolish then!

jdimichele · Feb 27, 2010

I use the Cokin P holder for my HiTech filters without any vignetting on my 135mm, 210mm and 400mm lenses. For my non-square filters (ie: polarizers) I just use screw-in filters. I find the convenience of having the Cokin P holder really nice and haven't had any problems with it.

Cheers,
Jay
www.jasondimichele.com

Cokin P filters on LF?

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