Right. I was going to post this, but I'll add that Ilford specifies grade 5 at 199M. Don't know why it's not "200", but that's another issue. There is a lot of thought that a true grade 5 cannot be done with some dicro heads. YMMV
Originally Posted by WayneStevenson
Even so, you should be able to get a grade 4, if not 4.5. I've never tested my Beseler heads, nor my old Chromega D, since I never print with more than about 50M or I would switch to a condenser enlarger.
As an aside: I recently purchased the proper blue and green filters, and I plan on doing a little experimenting on the split-grade technique to see if there are any differences between using blue/green and magenta/yellow (using the Ilford 00 and 5). There just might be some differences, but whether they will make any practical difference is another question. FWIW, I only split grade on "difficult" negatives.
But, I digress ...