Why Simulate Image Distortion?
Posted: Sun Nov 20, 2005 12:33 am
I have just saw this writing in the last newsletter:
Maxwell simulates a real camera with the associated lens set, diaphragm aperture, diaphragm blades etc. By using this type of camera model Maxwell can automatically simulate depth of field, motion blur effects, image distortion and color dispersion due to the lens set, glare, lens flare, etc.
Add as many cameras as you want, or import them from your favorite application. Add camera views for a better control and edition.
What called my attention is that Maxwell simulates "distortion"
This is not anything that anybody wants in their images!, that is something to get worried about, The most expensive lenses in the market are nera to eliminate distortion in the extreme cases as wide angle lenses. There are lens makers that has practically no distortion.
When I say "near" I am being very exigent, because the only obstacle to get a distortion free lens is the PRICE. This has been that way because the ideal curvature of the lens elements is never spherical, but Aspheric. The high tech necesary to build aspheric elements, is very expensive, so lens makers uses them carefully, combining spherical elements with one or two Aspherical elements, so that the price will not be impossible. In the virtual world this has no sens, because it is not more expensive to create the perfect lens, since it has NO EXTRA COST!
Other reasons that explain distortion in our phisical lenses that we use with our cameras, is that to eliminate distortion, it is necesary to calculate the elements for a unique focal distance , but nowadays photographers needs ZOOM lenses because they cannot carry 300 diferent lenses in their bag, so lens makers calculates them for one critical focal distance, and ignore the others. Here we have another problem in our phisical world which cannot be found in the virtual world. A professional photographer would have to carry several kilos of equipment to have a wide lense variety, and at the same time distortion free. But again in a virtual world we can have as many lens as we want, and change them with a mouse click !
As a third reason: Specially in architectural Photography it is NEEDED a good quality free of distortion lens.
As one of the most important aplications of Maxwell is architectural visualization, I assume that the lens should be distortion freel, no matter it's kind or intensity!
Sicerely
Ernesto Lacalle
Maxwell simulates a real camera with the associated lens set, diaphragm aperture, diaphragm blades etc. By using this type of camera model Maxwell can automatically simulate depth of field, motion blur effects, image distortion and color dispersion due to the lens set, glare, lens flare, etc.
Add as many cameras as you want, or import them from your favorite application. Add camera views for a better control and edition.
What called my attention is that Maxwell simulates "distortion"
This is not anything that anybody wants in their images!, that is something to get worried about, The most expensive lenses in the market are nera to eliminate distortion in the extreme cases as wide angle lenses. There are lens makers that has practically no distortion.
When I say "near" I am being very exigent, because the only obstacle to get a distortion free lens is the PRICE. This has been that way because the ideal curvature of the lens elements is never spherical, but Aspheric. The high tech necesary to build aspheric elements, is very expensive, so lens makers uses them carefully, combining spherical elements with one or two Aspherical elements, so that the price will not be impossible. In the virtual world this has no sens, because it is not more expensive to create the perfect lens, since it has NO EXTRA COST!
Other reasons that explain distortion in our phisical lenses that we use with our cameras, is that to eliminate distortion, it is necesary to calculate the elements for a unique focal distance , but nowadays photographers needs ZOOM lenses because they cannot carry 300 diferent lenses in their bag, so lens makers calculates them for one critical focal distance, and ignore the others. Here we have another problem in our phisical world which cannot be found in the virtual world. A professional photographer would have to carry several kilos of equipment to have a wide lense variety, and at the same time distortion free. But again in a virtual world we can have as many lens as we want, and change them with a mouse click !
As a third reason: Specially in architectural Photography it is NEEDED a good quality free of distortion lens.
As one of the most important aplications of Maxwell is architectural visualization, I assume that the lens should be distortion freel, no matter it's kind or intensity!
Sicerely
Ernesto Lacalle
that's kinky stuff! yay