I was able to grab a copy of the 40-150 for myself.
The good:
It autofocuses!
The bad:
Super front heavy. Extended much past 60mm it is off balance with all the weights that balance my 45-175 perfectly. I don't know how to add more weight since there just isn't any more room to attach anything. Tungsten might work, but lead obviously can easily be formed into any shape you want.
The good:
It autofocuses!
The bad:
Super front heavy. Extended much past 60mm it is off balance with all the weights that balance my 45-175 perfectly. I don't know how to add more weight since there just isn't any more room to attach anything. Tungsten might work, but lead obviously can easily be formed into any shape you want.