A Couple of Questions Re Cooke XVa

[Richard K.]

I must admit I've lusted after this lens for a while and just as soon as my kidney sale goes through I'll join the list at Badgers...

My questions:

Do the single elements improve their performance when used with say a yellow filter?

How do the single cells compare with equivalent focal length whole lenses - eg. how would the rear cell (476mm f/11) compare in performance with say a 19" (482mm f/11) Red Dot Artar?

Thanks!