| cruft wrote:|
. ... One must be careful of anecdotal evidence.
To a point this is true. I agree that several anecdotes do not form a data set. However, one problem that science has is that while you should not take them at too high a level of confidence, you may well ignore them at your peril, for when the collected anecdotes clearly indicate a pattern, the wise scientist does not ignore them. Maybe it is different in the optics world where laws of Physics are more well defined and concrete. However, in the Biological Sciences, where my training lies, the world of variables is pretty uncontrolled, or at least more variables exist that need to be accounted for. So are the situations in where optics are put to use in the field. When the overwhelming response for a particular optic from users in widespread areas report positive things, notice should be taken. Ditto negative reports.
So, yes to get a good optic, you need good glass, but to say an optic is necessarily good because of brand X glass, does not mean it is a good optic.