you hardly loose any light......1/4 stop maximim it is very small
and yes this does let you get wide fast primes .......it works very well !
especially on a GH2 where fast primes are expensive.
to be a DP it is a REQUIREMENT to know how to light, and not just a shot but a SCENE. most DPs nowadays think they've got the perfect ISO for interiors and think everything is solved and no stylized lighting is required.
I think the grafik power of the mac mini is the grafic card...
Did anyone ever use an external Grafic - Card from Matrox?? There are several external boxes ... http://www.voelkner.de/products/203186/Grafikkarte-Matrox-TripleHead2Go-DisplayPort-Edition.html?WT.mc_id=googlebase&utm_source=google&utm_medium=base&utm_campaign=C42905