In message ,
Wolfgang Weisselberg wrote:
You can combine teleconverters for even more degraded images.
With some lenses, a 2x and 1.4x stacked are still limited mainly by the
sensor (probably completely with a D30 or 1D). The Canon 300mm f2.8L IS
and 500mm f4L are two examples.
--
John P Sheehy
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