I've had a similar experience with these glasses. They just don't seem to be really well made and while I find the light-to-dark range mostly functional, I do often find myself wishing they would not darken as much as they do under certain circumstances and when I've worn them at around twilight, I find them too dark.
Originally Posted by zoom-zoom
I've not tried any other sunglasses of this sort though, so I really don't have anything to compare them to.
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1999 Specialized M4 Stumpjumper converted into a mullet SS
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR