Hey, this is my first post!
As the question says I need help choosing my next lens. I have a gh3 with the 12-35mm 2.8. So far this has been great for video and the occasional photo, but am looking for something a little longer, like the 35-100mm 2.8. This would be ideal for an upcoming wedding I might be photographing. I am also considering investing in some canon glass with a metabones adapter but unsure what lens I should get. This is the route I would like to take so that when I start shooting more short films, music vids, etc I'll be all set.
Thanks!
Don't go with Canon!! They're the worst to adapt to m4/3 (or Sony E mount).
Panasonic 35-100mm f/2.8 would be lovely, but it is kinda pricey.
I'd suggest a vintage 135mm f/2.8 or 105mm f/2.8 or 100mm f/2.8 lens. For instance I have Vivitar 135mm f/2.8 in Nikon F mount which I picked up for just a hundred bucks.
Downside this is a prime lens, so when filming events you might not get much choice when where to put your tripod or you might need to recompose quickly.
So I'd suggest getting a RJ Lens Turbo, which not only doubles the amount of light hitting the sensor (yeah!!), but also gives you a second FoV with your lens. I purchased mine here:
http://www.personal-view.com/talks/discussion/9086/rj-lens-turbo-m43-adapters/p1
And get Nikon 50mm f/1.8, which gives you another shorter focal length to use (but still longer than you have currently) and is even faster too. These can be found for about fifty ish bucks each.
Another option to look at getting too is a 80-200mm f/2.8 or similar vintage lens, this will be a bit more pricey. But can be found for only a few hundred dollars. And 200mm reach will go very far indeed on a GH3! :-D
I picked up my Sigma 70-200m f/2.8 (for Nikon F mount of course) for just NZ$99 (which is about US$75), but I got a crazy good bargain there! It is a very common lens I use at weddings with my various Panasonic m4/3 cameras, except for when I bring my 135mm f/2.8 instead (as it is waaaay lighter than my 70-200mm, and often I'd rather pack light).
A few seconds on KEH found a BGN grade Tokina 80-200mm f/2.8 for just US$162:
https://www.keh.com/search/list?pmnt=Nikon+F&category[]=Zoom+Lenses%2C+Mfg&category[]=Zoom+Lenses%2C+Non-Mfg&fl[]=70-200mm&fl[]=70-210mm&fl[]=75-205mm&fl[]=75-210mm&fl[]=80-200mm&fl[]=85-205mm&fl[]=85-210mm&sort_by=priceMax-asc
Took a quick look at the reviews of this specific lens, and I'd say this Tokina 80-200mm f2.8 is a great choice for your dollar if you don't want to spend more for a Nikon 80-200mm f2.8