(F)A* 300 f2.8 plus teleconverters

[Frank Wajer]

Hi,

has anyone tested the Pentax (F)A* 300mm f2.8 with the Pentax
teleconverters.

I'm looking for the best telelens investment, filling the 300-600mm focal
range.
This lens plus teleconverters would give me:

300mm f2.8
420mm f4
600mm f5.6

The 300 f4 lens gives 600 f8, which is a bit slow.
Any opinions?

Frank Wajer

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