600mm
600/4 = BIG
= Big money = big weight = big reach = big other kit to support it.
300/2.8 = SMALL
= + converters = 400/4 = 510/4.8 = 600/5.6 = light weight = same reach = much greater versatility = much less money =less kit to support it.
Ignoring the fact that with 600/4 you can still add converters, anybody got any thoughts on the above???
regards Subzero.
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