I would like to see a chart ranking the different glass but this would be difficult to do. It would take a panel of several people due to eyesight variations and subjectivity and then all the models would get changed before the evaluation is complete.

The Nikons did very well on color transmission which is critical for birding. Some of even the Alpha glass will have a slight blue or other colored tinge in certain light situations.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli