This thread has convinced me that I should try a photochromic lens for MTB'ing (here in Colorado there's alot of riding that alternates between bright sun, sun/shadow mix and mostly shadowy; and the VR28's have always worked well for me unless it gets too dark...then I'm fumbling for my yellow or persimmon lens if I remember to bring 'em).
However, I too am confused about the varying names/versions of this technology that Oakley lists on their website depending on what glasses/lens you are looking at (i.e., VR50 Transitions, VR50 Photochromic, G40 Photochromic, Black Iridium Photochromic, Black Photochromic, Transitions SOLFX...). Arggh!:?
So two questions:
1) It sounds like "Transitions SOLFX" is the technology that O uses and that there are three lens versions - VR50, G40 and Black Iridium). Is this correct?
2) Which version would act most like the VR28's when used during the shadow/sun mix that the VR28's excel in (but would allow a wider range of use when it gets too dark or perhaps even too bright for the VR28's)?