GFX und andere Grafiken » Fast lenses / DOF question

I've got two questions ...

The current lenses are not that fast,except the 110mm the lenses are F2.8 or "worse".
​Okay you have the cropfactor of 0.79 for DOF but in dim lighting you'll need to raise the iso a bit quicker.
​When you check the lenses of the competition, it's the same case.
Is it because the lenses would be too big / heavy for F2 or faster ?
Can we expect faster lenses, what do you think ?
​Probably the most mm produced for the gfx would be a 240 / 250mm ?

Also, if you would compare DOF of the 110mm F2 with a 85mm F1.2 on a full frame camera, which would be the most out of focus ?

Please help...

I didn't find the right solution from the Internet.

References
http://www.fuji-x-forum.com/topic/4664-f...s-dof-question/

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