I'm in the market for a 65mm-90mm range lens for the 4x5 rig with 6x9 roll back. Its ok if the 65 barely covers 4x5 since its so wide, but if i end up with a 90, i definitely want enough coverage to get some movements. I'm coming across a couple cheaper ones on KEH, but im not sure if they are just cheap(er) because they are in shutters that are older, or not as good. There are also some other terms i don't understand. An example is the 65mm F8 super angulon they have now which is "syncronized for flash comp B" I can't really decode most of that, except that its a compur shutter. It seems like copals are the most recent and commom. Another example is the fujinon 90mm SW F8 that's in a sieko shutter which sounds familiar to me because i used to use a RB67 that used all seiko shutter lenses. Is it worth it to get a lens that comes in a certain type of shutter to avoid problems earlier?