100mm diameter filters for Rodenstocks Sironar W 210 / S 300

[minh0204]

If I want to use square 100mm filter on those lenses, what options do I have? Lee only makes filter adapter in 95mm and 105mm diameter, not 100mm. Trying to search for 100mm filter adapter is just hopeless due to the ubiquity of 100mm square filters!

[mpirie]

Can you use a 100 to 105mm stepping ring?

Mike

[Bob Salomon]

If I want to use square 100mm filter on those lenses, what options do I have? Lee only makes filter adapter in 95mm and 105mm diameter, not 100mm. Trying to search for 100mm filter adapter is just hopeless due to the ubiquity of 100mm square filters!

Heliopan 100 step up ring is brass and 100 to 105mm. Probably only special order.

[Eric Leppanen]

Using the Lee 115mm press-on filter holder (fits over the lens barrel) is an expensive solution, but it will vignette less than using a step-up ring with a standard holder:

https://www.robertwhite.co.uk/filters/filter-systems/lee-filters-100mm-system/lee-filters-100mm-system-115mm-push-on-filter-holder.html
https://www.robertwhite.co.uk/lee-filters-donut-adaptor-115-100mm.html

[B.S.Kumar]

This filter holder is for 75mm filters, but I've seen them for 100mm filters also:

https://i.postimg.cc/HWwzVw9j/Adjustable-Filter-Holder75mm.jpg

Kumar

[Doremus Scudder]

Kumar,

The old Voss holders like the one you picture are no longer made as far as I know and "scarce as hen's teeth" anymore. I've got two and I'm not parting with them anytime soon.

Best,

Doremus

[minh0204]

Thank you gentlemen for the suggestions, I'll explore some DIY options now that I know 115mm press-on holder is a thing.