There has been a discontinuity. Both Sigma and Tamron have come out with $1000 150-600mm zoom lenses using low (or extra low) dispersion glass. Nobody expected to see lenses like that for that price. Nikon has a 200-500mm F5.6 lens. It only stands to reason that Canon will compete in this segment as well.privatebydesign said:But all I am doing is pointing out common sense based on actual current and past lenses, so rather than keep arguing the levels of sarcasm I deserve give me one scalable example from Canon's past or present that contradicts my comment that a 150-600 f5.6 L lens would come with a high price tag.
The thing is, to compete in this segment, you need a relatively low cost lens. Yes, you could build it with fluorite elements for $8000, but that's an entirely different market segment. They need to keep it to about $2500 MAX to compete here..... and it could be done with UD glass and still be an "L" type build.
Regardless of if the lens is L or not L, it will be about the same physical size and will take similar electronics, similar switches, and similar machining of the shell. The big variable is what type of glass goes into the big element.... If it is regular glass it is not an L lens. If it is fluorite, it is an L lens. If it is UD glass it is an L lens...
Ultimately, this discussion comes down to a mater of opinion. Mine is that Canon could come out with a $2500 200-600mm F5.6 L lens using UD glass as the large element.
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