P vs. Z-Pro Filters for Mamiya RB67

I want to get some Singh-Ray neutral density filters for my Mamiya RB67 lenses,

but I don't know whether I should get the P series versions (roughly 3.25" x

4.5") or the larger Z-Pro versions (4" x 6"). I have three lenses: a 50mm,

127mm, and 180mm. The filter thread on the lenses is 77mm.

 

I am thinking of abandoning filter holders in favour of taping the filters to

the lenses.

 

Either way, I'd like to know if I would be better off with the P-series or the

Z-Pro filters. Any advice would be most appreciated.

 

Graham

The only concern would be possible vignetting on the 50mm. I use a P filter on my digital camera and it just clears 17mm, which is equivalent to 28mm on a 35mm camera. Your 50mm is around 26mm equivalent so it may be a little too wide for the P size to work. The Pro Z is more expensive but at least you wouldn't have to worry.

I use P size filters on my RB67 and 50mm lens and they don't vignette, just. The filter holder I use is the Cokin P size and it attaches with the 77mm adapter ring.

 

If I forget to remove the 77mm protective Skylight filter from the Mamiya 50mm lens and attach the Cokin filter holder to the Skylight rather than the lens directly then the P filters vignette. That's how close tolerances are.

IMO, the best solution is a filter holder with shade. Depending on the lighting conditions,

flare can be an issue, (especially with uncoated slip-in filters). Taping expensive filters can

get messy.

 

I use a Lee System ... regular holder & shade and the W/A shade with 77mm adapter rings

that reverse back on the lens to eliminate vignetting. These take the larger sized filters.

Z filters are also made from a higher quality resin. Cokin does not recommend using the P series (especially the thicker dual color polarizers) with lenses longer than 105mm.

And i haven't seen a Cokin filter yet that i would recommend.<br>Have a look at what Lee, or Cromatek, are offering instead.

Thanks for the tips; I much appreciate your responses.

Cheers,

Graham

I use P size filters on my RB67 and 50mm lens and they don't vignette, just. The filter holder I use is the Cokin P size and it attaches with the 77mm adapter ring.

 

If I forget to remove the 77mm protective Skylight filter from the Mamiya 50mm lens and attach the Cokin filter holder to the Skylight rather than the lens directly then the P filters vignette. That's how close tolerances are.

 

 

That's great to see this post I also have a Cokin P set of filters and holder I will be using them on a 65mm lens on my RB67 pro SD I have also hacksawed the two front slots off of the holder, so, going on what you say in your post I should be more than safe from vignetting when I photograph the sunrise on the longest day 2022. Regards Peter.

If you will, like some British landscape photographers, use them practically all the time, then definitely get good ones and good quality holders and the like.

 

Otherwise, outfits like Fotodiox (WonderPana), if they're still around, are good enough and a little less expensive.