Which set of Filters and 77mm filter on Pentax 75/4.5

I have three lenses (55/4, 100/4, 200/4) form my 67II and I am planing to buy another two 45/4 and 75/4.5. Now I would like to buy set of filters for those lenses. First three lenses have 77mm thread and other two ones have 82mm thread. I am thinking about Cokin X (profi line for threads up to 112 mm) filters - does anybody have it ? or about BW MC filters. Can you advise your experiences with filters, which do you use. Do resin filters have any coating ? Is possible to use 77mm filter with step down ring on 77/4.5 as I feel that this lens has bigger front lens than is necessary. I would appreciate any suggestion. p.s. other brands like LEE, Linhof etc. are very difficult to get here in Czech.

Pavel:

I use mostly Tiffen but have one B+W and one Hoya. Using a 77mm on the

75mm f/4.5 could easily cause vignetting. Have you considered using

only 82mm filters on all of your lenses? You would need adapter rings

to do this of course. This is what my brother does. I have all the

different size filters and it adds weight to my camera bag. But,

messing with adapter rings is also a disadvantage. There doesn't seem

to be a whole lot of difference in quality between the three filter

makers I have listed. The B+W does fit better on my lenses though. SR

Steve : Do you use graduated filters ? How would you solve this need ?

Do you use hood with filters, does it not cause vignetting ? I know

there is not free lunch, but I want to make best possible decision.

Not sure what you mean by graduated filters. I use built in lens hoods

only with my lenses and filters. Yes, some of my lenses don't have

hoods.I doubt very much that Pentax add on hoods would cause

vignetting. SR

Pavel - I did a little research recently to find a filter system that

would fit all three of my lenses - 45mm, 135mm and 200mm. The fly in

the ointment is the vignetting that can happen with the 45mm. The

only system I could find that would work on all three was the Lee.

Each of the lenses requires an adaptor ring to hold the Lee filter

holder. The ring for the 45 is "inset" to the outside of the lens so

that the holder is closer to the lens glass. I have used my Galen

Rowell/Sing-Ray graduated ND 4inch (120mm?) filters without problems,

but have not yet used the 4inch Tiffen polarizer (which is 4mm thick)

as I needed to order a 4mm guide from Lee for the Tiffen separately.

Hope this helps. Don