[mattb123]

I have a kit (GFX 50r) with 4 lenses, and they have three different filter sizes.

20-35mm has 82mm
32-64 has 72mm
35-70 has 62mm
100-200 has 67mm
and my Pentax A* 300 has a 72mm

I have a 72mm variable ND that is not bad and I have been using it on the 32-64 but I think I'm going to get rid of that lens (and keep the 35-70 which is smaller) and I never use a ND on the 300.

I'm tempted to get 82mm filter(s) and step up/down rings but that may not be the best solution.

Is there a square filter system that might cover all these lenses? Realistically the 62 and 82 sizes are the ones I would use with a filter the most nut those are also the min and max filter sizes.

Got any good suggestions for me? Thanks!

[Bob 256]

Cokin Filter system????

https://www.adorama.com/cku3h028.html?

[Ed Hurst]

I used Lee for many years, with 67mm, 77mm and 82mm rings. Haven't checked whether they do a 62mm, but I assume so...

Have recently decided to move across to Kase, but am not as up on the holders/rings with that system yet.

[Alex645]

I'm tempted to get 82mm filter(s) and step up/down rings but that may not be the best solution.

Is there a square filter system that might cover all these lenses? Realistically the 62 and 82 sizes are the ones I would use with a filter the most nut those are also the min and max filter sizes.

The Cokin and Lee square filters are 4 inches which should cover 82mm (about 3 1/4 inches) but I'm not a fan of shooting through "optical resin" or polyester filters.

The issue with step rings is the gap which becomes more problematic if you need to use more than one.

If quality is more important than convenience, there is no substitute for a quality multicoated filter dedicated to the lens filter size.

[Roadboat24]

I started with the Cokin P filters "84mm". They will vignette on wider lenses. I use K&F 100mm on lenses down to 15mm, but that's getting really close. If you use step rings, it sees the holder earlier.

[K-Three]

If I'm reading this right,
You will need an 82mm filter or filters, and an 82->62 and an 82->67 step up ring,

I would not try to go 82->67-> 62, too much stacked together.

The 82 fits your widest with no adaptor, so should be no vignetting issue,
and only using one adaptor ring should not be an issue for the longer lenses,

I've never cared for the square filter systems, the frames and adaptors seem too fussy and bulky for me.

[Ed Hurst]

I can tell you that the latest Kase filters are optically superb

[mattb123]

Thanks. I'll look into these options. I've heard of all these before but never paid very close attention.

I can tell you that the latest Kase filters are optically superb

Ed, do you use the magnetic system? That seems nice if well implemented.

[biz-engineer]

on the 32-64 but I think I'm going to get rid of that lens (and keep the 35-70 which is smaller)

When I saw that you first bought the 32-64, I was already anticipating that you would sooner or later sell it and keep the 35-70.

I'm tempted to get 82mm filter(s) and step up/down rings but that may not be the best solution.

I went down your route with circular and square filters. Initially I used circular filters, then I acquired a cokin 100mm square system which cause lots of vignetting from 24mm (FF) and wider. Then I acquired a Nisi/Haida 150mm square system for the 15-30, plus adapter rings to 82 and 77. Then I acquired a 67mm circular kit + 1 67-62mm ring that fit on both DFA21 and 28-105, which doesn't take much space in camera bag. The problem with square filters is that I got bored of having to carry one or two bags with large filter holders just for the occasional picture that requires using a filter, too much hardware to carry around to just a few pictures taken. Whereas intentionally limiting myself to some key circular filters (1 CPOL + 3 ND), is actually cheaper and much more compact. For the choice of the square filters, the wide angle end and the gap between filter and lens front is what define the minimum size of the filter, rather than the diameter of the lens thread. Anyway, IMO, the critical thing is the widest angle lens you want to use the filters on, so I would select a filters kit that work for the 20-35, and than have a couple of rings to adapt on the other lenses. If you go for a square filter system, I would predict that you will have vignetting problems if you use a 100mm square filter on your 20-35, 130mm square (Cokin) would be the right size, or 150mm square from other brands. If I was buying again from scratch , I'd buy the 130mm cokin system to cover all lenses.

To summarize: If you plan to use your filters on the 20-35, I would recommend either a circular filter kit 82mm with step down rings to other lenses OR a square filter system at 130mm or larger.

---------- Post added 11-05-23 at 07:25 ----------

I started with the Cokin P filters "84mm". They will vignette on wider lenses. I use K&F 100mm on lenses down to 15mm, but that's getting really close. If you use step rings, it sees the holder earlier.

Exactly. That's important and a good thing to be aware of.

[Ed Hurst]

Ed, do you use the magnetic system? That seems nice if well implemented.

At the moment, I have just acquired a Kase holder (which screws into the lens filter thread, using differently-sized rings). I previously tried to slide them into my old Lee holder (also a screw-in kind) but I found the Kase filters weren't a snug fit.

[acoufap]

I went down your route with circular and square filters. Initially I used circular filters, then I acquired a cokin 100mm square system which cause lots of vignetting from 24mm (FF) and wider. Then I acquired a Nisi/Haida 150mm square system for the 15-30, plus adapter rings to 82 and 77. Then I acquired a 67mm circular kit + 1 67-62mm ring that fit on both DFA21 and 28-105, which doesn't take much space in camera bag.

With the exception of the 150mm Haida square system that sounds pretty similar to my way. - 67mm was necessary because of the DFA21Ltd built-in hood.

Changed from the 62mm circular filters to 67mm that I had for the DA18-135 and DFA28-105.

For the DA20-40Ltd. I now use a step-up ring 55-67 that has nearly the same effect as the original tiny screw-in hood. So I can use my 67mm filters and a standard lens cap. If a deeper hood is needed I screw in a standard 67mm metal hood.

[barondla]

Problem with all the adapters or square filters is the fiddle factor. You shoot in rugged conditions. Cold fingers struggle with complex tasks. OEM lens shades also become useless. I tend to use square filters when movement is required, like graduated filters.
Thanks,
barondla

[Not a Number]

The Cokin Nuances series of filters are made from glass.

[Oldbayrunner]

Though Cokin and Lee are the two more widely thought of square filter systems there are others that stand up well against them. Because of my DFA 15-30mm not having the ability to screw on filters, I went with the Benro square filter 150mm & 100mm holders & adapters to fit all of my lenses as not too many have an adapter for that lens I liked as well. The real expense is in the filters.

[mattb123]

Well I took the plunge on some Kase KW Revolution filters (82mm with an adapter ring for the 62mm siz). They are a new model and expected to take a few weeks to arrive but I'll report back on what my impressions are. Thanks for all the ideas and info!