I want to buy a new lens and found a good deel but it is aspherical. What makes it different from other zoom lneses?
Thanks
2006-11-26 17:28:53 · 3 answers · asked by milehighstar 2 in Consumer Electronics ➔ Cameras
I mean for a Canon Rebel XT EOScamera....sorry...
2006-11-26 17:36:45 · update #1
The previous answer is correct. The surface of 'ordinary' lenses trace the contour of perfect spheres. With a-spherical lenses, the surface of one or more glass elements doesn't. I have a 50mm Nikon f/1.4, and the front element looks like it has a big dimple in it. That's aspherical. As stated, the aspherical elements are there to correct for distortions. If anything, these lenses are more complex and more expensive to make.
2006-11-26 18:08:15 · answer #1 · answered by OMG, I ♥ PONIES!!1 7 · 1⤊ 0⤋
The word means "not round" and in eyeglasses, it means its the more expensive version of reading glasses; presumably because its magnification makes the letters up close more similar in size to those further away, thus taking care of that BIG NOSE problem you might have with a fish eye lense, or what we might see when we look in a convex mirror. So, it does the magification different on the perimeter than in the middle. It's a GOOD thing.
2006-11-27 01:33:55 · answer #2 · answered by Yenelli 2 · 1⤊ 0⤋
Aspherical lenses is for people who have astigmatism.
You need to know what your prescriptions are to buy them anyway.
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2006-11-27 01:30:40 · answer #3 · answered by star_puk 3 · 0⤊ 2⤋