Center filter needed for 90mm5.6XL ?

[Roy Feldman]

I recently got a s 90mm5.6XL I only intend to use it on a 4X5 for landscape work , do I need be concerened with a center filter.

[Gordon Vcikrey]

I shoot 4x5 landscapes without using a cf on a 90/4.5. I don't encounter enough fall off problems to warrant a cf for that lens, even when using RVP. But there _is_ some visible marginal fall off, and I always keep that in mind when composi ng, especially when using a lot of shift or rise. Your shooting habits may diffe r from mine, and so might your sensitivity to fall off.

At the 90mm focal length for 4x5, some landscape photographers use a cf and some don't. Since you already have the lens, I suggest you just try it and critique your results without the cf. It's your call.

[Alan Gibson]

See also "What is the story with center filters?", http://www.greenspun.com/bboa rd/q-and-a-fetch-msg.tcl?msg_id=0007xb

As you've already got the lens, you can judge the results you get. Is there too much fall-off for your purposes? If not, then don't worry about it.