Larry Colen wrote:
Another factor that also played a part is the 20km or so of atmosphere
that I was shooting through:
Yeah I guess I wouldn't be doing those kinds of images. Atmospherics
are always a problem.
I certainly don't claim that the experiment was definitive. About all
that I proved was that if you don't do it right, teleconverters won't
improve the image quality. The next step is to figure out "what doing
it right" is.
Teleconverters, by default, always DEGRADE image quality; never improve
it. Anytime you put something between your lens and your camera you are
going to lower image quality. The question is: by how much? With
matched converters like I have, not by that much, but with crappy
third-party inexpensive TCs you are going to suffer greatly.
I'm also beginning to suspect that in some circumstances, my camera
body may be a limiting factor.
Not a chance. The Sigma 50-500 is an "ok" lens but is nothing
spectacular. Put a TC on it, and it lowers it's quality even more.
--
Christian
http://404mohawknotfound.blogspot.com/
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