Matte Box for Cooke 20-100

[David W. Jones]

My current matte box will not fit the front of my newly acquired Cooke 20-100 zoom, and I'm having trouble finding one that will fit. So I'm seeking advice from those of you that have successfully mounted a matte box to a Cooke 20-100.
Thanks in advance!

Dave

 

[Steve Smith]

I use a 6.6x6.6 Arri MB-14. I'm sure most 6.6x6.6 matteboxes should work

Steve Smith

 

[David W. Jones]

The rear opening of the matte box was my concern, not the filter coverage size.

 

[Gediminas Vansevicius]

Both Arri MB20 and O'Connor O-Box fit the lens if you take off bellows.

 

[Bob Rudis]

The Arri LMB4a is a great mattbox. Only 2 stages, Clip on. You can get reducing rings for almost any lense. If Arri doesn't make it, Lenitquip in Canada does. Candreva (JC Camera Systems) makes a set of Masks for it. It's my go to mattbox when my MB-14 is too big, too much. The O-box has a filter tray lock down screw that's hard to get to. That was a deal breaker for me. Otherwise the O-Box looks pretty good.