Soon we will have glass-less lenses, nothing but but air space and fancy physics.
At first they will be priceless, then they will be everywhere.
No glass, no glass defects.
But there may be disturbance in the force.
Not kidding.
Tin Can
descriptions are made to entice a buyer.
buy with paypal, you have 45 days to see
if the lens is what the description says
and if it isn't just return it. no questions asked.
Being a stickler for language, I am inclined to agree with the OP.
I prefer formulations such as: "Has no significant impact on image quality", or "In my opinion, this defect does not degrade image quality to any visible degree".
But, but, sputter.... those tiny dusts are creating vibration and destroying sharpness.
Look here!
Tin Can
Puffing - sales hype- is all it is, no one takes it seriously anyway.
But Certo6, who (used to?) repair folding cameras, did an experiment where he took several photos with a camera that had a dead bug behind the lens.
Result: Some barely noticeable lowered contrast.
I supposed any imperfection can affect a lens function, but some substantially less than others and som not really noticeable. People miss out on some wonderful lenses just because of a scratch it bubble
It seems to me more damage is done by trying to keeps lenses perfectly cleaned.
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