I’ve not used the 35-100/2.8X lens much but from my limited time I can tell you its small, sharp and fast. When I see it on the GH3 next to the 5D with the 70-200/2.8 in this video that pro photographer Paul Gero made its an eye opener. Holy cow its a small setup for pros. Such power in your hands with this setup! I’m loving my GH3 to the max. For pro and serious enthusiasts wanting to shoot light its the ticket and very few cameras in production can compare to the video files from the GH3. If you can imagine what it would look like for your stills to come alive that will give you an idea.
Be sure to check out what Paul is up to. The tide is turning folks, more and more pros are seeing the advantages of a pro hybrid system.
When I switched from my Canon 5D system last year I thought I was a bit crazy. Now I see that I was a bit ahead of my time.
From Pauls YT page
The Lumix G 35-100 f2.8 is an incredible lens and is the Micro 4/3rds equivalent to the vaunted 70-200 f2.8 in the full frame DSLR world. The Lumix G 35-100 f2.8 lens weighs less than one pound and produces incredible and professional results in terms of color, sharpness and “the look”. This lens is the one that many have been waiting for to allow them to make the move from full frame DSLR cameras to Micro Four Thirds cameras such as the Lumix GH2 or Lumix GH3 to shoot both stills and video.
This lens performs at a professional level in both still and video modes for the modern hybrid photographer.
Southern California wedding and portrait photographer Paul F. Gero reviews this lens and shares photographs that he has made with it using both the Lumix GH2 and Lumix GH3.
Will Crockett of discovermirrorless.com and Paul Gero both believe that this lens is indeed a DSLR killer for a vast portion of the photographic market and will be widely adopted by advanced amateurs and working professionals alike.
This lens, along with the Lumix G 12-35mm f2.8 OIS lens are worthy (and much smaller and lighter) replacements for the widely popular mainstays of DSLR photographers: the 24-70 and the 70-200 lenses.
Be sure and sign up for more information on mirror less cameras at the website: http://discovermirrorless.com .
To view more of Southern California based wedding and portrait photographer Paul F. Gero’s work, please go to his site at:http://paulfgero.com

