brocknroller
porromaniac
Don't search for it! As Stephen Ingraham once said when he was writing for Better View Desired, if you look for CA, you may never be able to stop seeing it. But if you stumble upon it, that's a horse of a different color.
A lot depends on how sensitive you are to CA. Some people are completely oblivious to CA even in roofs with negative focusing elements and no ED glass. Nada. Nichts. Zip. Their brains have a built-in CA filter.
Others, who have become bin testers and are sensitive to it, can't use a bin without ED glass w/out noticing it and even notice it in some ED bins. So you have birders on here who span the spectrum. Me, I tend to be on the "red and green" tinge parts of the spectrum, particularly in the winter with its dismal gray skies and bare tree limbs. So I prefer bins with ED glass, but as I have found out, not all ED glass is created equal (no constitutional rights for glass), or perhaps it's the fact that the other elements are producing more than other bins that makes the final output less "clean" than other bins or in the opposite case, it has a positive focus element that doesn't add CA.
The point is that some bins work better than others to control ED even when they have ED elements in their objectives.
Est omnia in mente -Ringo Stellata
