Sigma 50-500mm and a converter
Hi
Happy new year.
Using a Nikon D200 and the Sigma 50-500mm 1:4-6.3 AP0 DC HSM D lens with a KENKO N-AF 1.5 teleplus SHQ converter what focal dissidence will it give me I normally shoot at ISO 400 in good light I can shoot at f4 ok, so with the KENKO N-AF 1.5 teleplus SHQ converter upping ISO to 800 will I be able to shoot a f4 If no what would be the ISO to shoot with the converter to shoot at f4 I hope this make sense
Hugh
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