« on: July 06, 2012, 07:48:53 AM »
When the 200-400 lens becomes available I will be purchasing it or the 400 2.8 prime. The delima of which of these 2 lenses would be more effective is making me mad.
The versatility of the 200-400 with the built in ext will be excellent. To think, though, that with the 1.4X and 2X ext gives you 3 incredibly useful focal lengths is equally incredible.
Has anyone else given this much thought?
It all depends whether the 200-400 is usefully very sharp at 560/5.6.
From the ISO 12233 test charts we know that the new 400/2.8 is very sharp at 560 - even at f4 or half a stop beyond - with the 1.4 TC and it is much lighter than the previous model. It is also likely to be substantially cheaper than the 200-400.
Close call! We'll know in a few weeks!
If the 560/5.6 works we may see the next models of the big whites all fitted with built in TC - with stratospheric price tags!