Has anyone had success putting a teleconverter for professional video in front o f a long lens to make it even longer? I remember a year ago, someone advertised one of these on Ebay saying it could be used on LF lenses. If it works, a X 1.6 could turn a 600 into a 960mm. To be honest, I have tried that with a small vide o converter and although the 4x5 format was well covered, the results were unacc eptably soft. The pro converters are big pieces of glass, made for zooms with fo cal lengths ranging from 10 to 180 mm, but using a longer prime lens probably in duces some additional aberration. In reality the Fujinon C 600 is sharp enough t o produce images that can be cropped, still, my curiosity calls for feedback if there is any!
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