If you believe that, then why buy a lens? You can get a sharp image without one? Why don'y you start selling them, you can sell sharper lenses for just the cost of a roll of toilet paper.
Hi,So you believe a lens with one element is sharpest? Maybe one with no elements is the ultimate?
IMHO, every element added will decrease IQ by a bit, so a lens without IS will have slightly better IQ than lens with IS (when both lens are from the same generation and same grade) under perfect shooting condition.
That would be so. Looking through a hollow tube will always give you the clearest sharpest image. You can not improve the light when it is in it's near perfect unrestricted form.
Multiple lens elements do, in fact correct the various abberations that come from just one element. Thats why the lenses that are sharpest have multiple elements.
Your theory seems pretty badly flawed when compared with the real world.
Exactly what do you think lenses do?
They take the pure raw light and the bend it, skew it, rearrange it then focus it.
Multiple elements correct the aberrations that the first few elements create. Multiple elements are used to put the light back in the arrangement it started with. It doesn't improve what is natural.
Without one element the light isn't flawed, it isn't until light hits the glass that it changes and bends and compresses.
Weixing is partially right, in that when it touches the first element something is lost. Every element it touches after it looses something, but the following elements are putting it back in the right order for focus. Put enough elements in a lens the light will never make it through.
Yes, something is lost, and it is light.
But ... does IQ get worse with each additional element, as he said? If so, why not a 1 or a 2 element lens? IQ should be much better than those 22 element lenses - less CA, sharper, less distortion, etc - Really ?? Where are those one or two element lenses with superior IQ, or for that matter, 5 element lenses?
Its a nice theory, but the best lenses with the best IQ have many elements, and they do lose light, but not all that much. The 9 element 85mm f/1.8 has a Tstop of 2, so it loses 0.2 stops in the glass. The 20 element 70-200mm f/4L IS has a Tstop of 4.6, so it loses 0.6 stops. 20 elements, and it has suburb IQ and sharpness!
So, how many elements until you lose a stop? Maybe 30 some elements? Your worry that light won't make it thru a lens due to the number of elements seems a bit far fetched.