UWA Lenses and Cokin "P" series Filters - Need info

[Dorman]

I'm currently using the Cokin "P" series filter holders (I have both the WA holder and the regular one that holds 3 filters) on a 17-40 - I use a mix of ND's and GND's, the filters are Hi-tech's but fit in the P-series holders.

I'm looking to make my move to UWA as I primarilly shoot landscapes and really felt the need for the extra width this morning. I need to know if these filters and holders will work with UWA lenses like the Tokina 12-24, Sigma 10-20, and Canon 10-22 without vignetting or other issues.

Can any users chime in to let me know what to expect, or if I need to move to a different filter system if I go UWA.

Thanks.

[angryhampster]

I use the Cokin wide angle holder and HiTech GND filters on my 10-20 @ 10mm with no problem.

[Dorman]

Good to know Angry Hampster!
If one wanted to use more than one filter is there a P series system out there that would do it with no vignetting?

[angryhampster]

Originally Posted by Dorman

Good to know Angry Hampster!
If one wanted to use more than one filter is there a P series system out there that would do it with no vignetting?

Not P series. You'd be better off with Cokin's Z-pro system for multiple filters. They use larger filters that are designed for medium format cameras.

[Dorman]

hhhmmm.... I usually like to use one GND in conjunction with a regular ND filter, I usually line up with my horizon, then put the ND back in to slow down exposures. I suppose the only thing to do would be to get a round ND filter with front threads, put it on the lens, then screw the WA holder in to the ND filter...

[Dorman]

I seem to recall someone on the forum here modifying their 3 filter P-series holder to work with a Canon 10-22, for some reason Mike Bell's name rings a bell but I can't find anything in the search. Anybody recall this or can dredge up the thread I'm looking for? NEVERMIND, found the thread, it was Lightrules not Mike Bell!

Also, I'd be curious to see how much vignetting occurs with the normal P'series holder below 14mm...any images?

[SWPhotoImaging]

The P series filters are 84mm wide.

The holder protrudes 10mm beyond the mounting ring, which would have to screw into your screw-in filter.

I'd bet that the Cokin holder with two filters would be less likely to vignette than the screw-in + Cokin combination.

This will only work on a crop-frame camera though. Use UWA on a FF (wider than 20mm) with Cokin P holder, and the holder blocks the corners of the frame.

[Dorman]

Well, I have both holders so once I order my UWA I guess the only thing to do is give them both a try and see how bad the vignetting is on the 3 filter holder. From research it appears that the WA holder works just fine. From Lightrules mod tutorial he chopped off the front two holders essentially creating the WA holder, even if chopping off 1 holder (leaving two) reduced vignetting alot it'd be useful, one could clone or crop out vignetting if you needed two filters to get the results you're looking for.

Using my setup on the beach yesterday morning 17mm wasn't nearly wide enough, now I'm giving into the w-i-d-e urge I've had for awhile now.

[Marsellus_Wallace]

Yes, this works with no problem, at least with one filter. I sometimes even hold the filters in front of the lens with my left hand because I'm lazy. This sounds a little crude maybe, but it works fine for me. With the P filters i don't have vignetting problems.

The Z-pro system is not necessary to buy, but it's very nice indeed.

[angryhampster]

Originally Posted by Marsellus_Wallace

Yes, this works with no problem, at least with one filter. I sometimes even hold the filters in front of the lens with my left hand because I'm lazy. This sounds a little crude maybe, but it works fine for me. With the P filters i don't have vignetting problems.

The Z-pro system is not necessary to buy, but it's very nice indeed.

I've done that before as well. I forgot to bring my filter holder so just held it up. It worked fairly well, just couldn't hold the camera steady.

[Dorman]

that's what tripods and remote shutters are for angry hampster!

[angryhampster]

Originally Posted by Dorman

that's what tripods and remote shutters are for angry hampster!

Too much work

The shot wasn't worth it anyway.

[Dorman]

Doing some thinking, not being able to effectively use multiple filters may keep from getting an UWA...

[SWPhotoImaging]

Originally Posted by Dorman

Doing some thinking, not being able to effectively use multiple filters may keep from getting an UWA...

Are you shooting a FF camera?

If not, then the problem goes away. P-Series will stack on a 10-22 on a crop-sensor camera

[Dorman]

From what I've read the WA P-series holder will be fine down to around 10-11mm, but this only allows the use of one filter. Using the 3 filter holder it will vignette and you'll see some of the holder at around 14mm and below. I'm using a 1.6 crop and apparently this is the case.