Super Angulon 165/8: Do I need a center filter?

[jrydberg]

I'll do a bit of movements (front rise) -- do I need the (expensive) center filter?

The topic should say 165/8 of course!

 

[jrydberg]

And BTW, what filter system should I use for this lens?

Should I try to get rear-filters, or get some holder for square filters to put infront of the lens?

 

[jrydberg]

Why did you have to use front gels?

Thanks for you reply!