I acquired a 40mm WA with some other gear recently. I haven't had any real reason for one and don't currently have an extra lens board for it. Are these legitimate optics or do they make concessions to accomplish their greater magnification? Is the quality approximately the same as the standard 6 element Rodagons? Do they have extra vignetting issues to worry about? If it isn't worth keeping and having in a drawer for the next 10 years, I may as well sell it off to someone who knows that they need it!

