StevenBills
Active member
Anyone seen this combo used? The 18-35 seems to be a pretty versatile little lens.
Any thoughts?
SB
Any thoughts?
SB
GH2 GH2/3 with Sigma 18-35
- Thread starter StevenBills
- Start date
Erik Naso
Veteran
It would have to be a Nikon mount with manual iris, and I don't think Sigma made the Nikon version with manual iris. At least I cant find any pictures or specifications that say they did. It's a very nice lens.
Maybe a Nikon adapter with the manual iris ring on it could work. I had one it really was touchy to get it just right. I think you would be better off with the Lumix 12-35 which is wider and the same in the longer range after crop.
Maybe a Nikon adapter with the manual iris ring on it could work. I had one it really was touchy to get it just right. I think you would be better off with the Lumix 12-35 which is wider and the same in the longer range after crop.
The Sigma 18-35 is a fantastic lens. Very well built and great optical performance that could rival some primes at an amazing price. If you are going to use it on the GH3 via a Speedbooster (make sure it's the nikon version) then I say 'go for it!'. If you are not interested in the speedbooster then just get the Lumix 12-35 2.8
Once the Nikon version is available, I'm getting one (even without the SB). Most every interview wide angle I shoot is within that range and speed, and all reports are pretty positive.
Regarding adapters, Metabones just introduced a non-boosted version with their cam lever aperture design... It works wonderfully and is cheaper than the Novoflex
Regarding adapters, Metabones just introduced a non-boosted version with their cam lever aperture design... It works wonderfully and is cheaper than the Novoflex
Grisnjam
Well-known member
Andrew Reid reports that the Sigma 18-35 + Speedboster Vignettes at lower focal lengths on the GH3 which makes since because the Sigma is made for a APS-C sensor and the Speedboster reduces a Full Frame lens to m4/3 sensor size.
The Speedbooster does not reduce a Full Frame image circle down to m43 as you say. Regardless of the lens mount version used, it reduces by .71.
i have heard that the Sigma 18-35 + Speedbooster does vignette slightly on a GH2 but have heard that it covers the GH3 sensor as it is not a MASS and has a 2x crop factor over the GH2's 1.86. Don't hold me to this though!
i am yet to use the sigma on a GH3 but have used it on Canon APS-C cameras and its a wonderful lens.
Grisnjam
Well-known member
I should have said optimized for instead... The Speedbooster is optimized to work on Full Frame lenses. Of course any lens mounted to it will be reduced by 0.71 but if the lens is made for a smaller sensor you run the risk of vignetting.
FrameFarmMedia
Veteran
I'll have to check out Andrew's site for video but since the Speed booster is designed to take FF glass and reduce to APS-C (going from 1 to 1.5crop) I don't see why going the same crop further from APS-C to M4/3 (1.5 to 2x crop) would vignette. its reducing it by the same amount or is FF glass made with larger margins to the image circle? intersting anyway. I can't wait till the Nikon version is out on mass so we will see more examples on the GH3. This lens with or without the SB hits my fav focal lengths anyway and could replace a few primes I have.
Grisnjam
Well-known member
Yeah on the comments of this post:
http://www.eoshd.com/content/11294/...-camera-lens-sigma-18-35mm-f1-8-speed-booster
He says this:
The 2.0x crop on the GH3 might just make the difference as noted by vtwiz.
angelopoulos
Active member
Hi. yesterday arrives the sigma 18-35. Inmediatly installed on my gh2 with speedbooster and saly yes, it vignete a little, maybe at 20mm the vignet disapear. soon ill ipload some footage.