bitcrusher
Well-known member
Screw that I want zeiss Hasselblad CF lenes on a m/43. The rear element should be large enough that we can get to F/.70 maybe... thats what I want to believe anyway.
GH3 New Metabones adapter coming for EOS=>M4/3 that makes the lens faster!
- Thread starter akivisuals
- Start date
Screw that I want zeiss Hasselblad CF lenes on a m/43. The rear element should be large enough that we can get to F/.70 maybe... thats what I want to believe anyway.
Why would you have to re-invest in glass when you have a 11-16mm, which is plenty wide for M4/3 and a set of Nikons? This is more than manageable with for an AF100.
ReelFilmGeek
Well-known member
You are probably right but I think the main thing that turned me off was needing something like the faster wide angle lenses like the 17.5mm and 25mm that are not cheap. With the speed booster I could get away with getting something like the samyang 24mm cine lens which would then be used for double duty as a 25mm lens and a 17.5mm lens with the adapter.
stoneinapond
Veteran
My thoughts exactly, if physically possible. A passive converter that would accept OCT18 and other larger format lenses that have dedicated m43 adapters attached. I will email them this weekend.
While I think this is physically impossible... theoretically, you could use such a beast to stack speedboosters and yield your 0.5x/+2stops from a full-frame lens. The first reduces it to DX coverage, the second to m43 coverage.
To get even sillier, you could hypothesize stacking even more to use with ETC mode
ReelFilmGeek
Well-known member
Ya the probably was the thing haha, I mean I didn't like the idea that some lens I would buy might not be usable on other cameras but other than that it seems like an amazing camera. I just finished high school and am trying to get in to doing some freelance jobs and might buy the af100 if I can start to get more clients.So it was a budget thing then. Nothing about the camera.
It accomplishes this by concentrating the lens' coverage circle (making it smaller), and still has to work within the original mount's flange distance... so it will effectively only work on mirrorless cameras (replacing the mount adapter) with lenses designed to cover a larger system (full frame lenses now cover APS/DX and smaller, APS/DX lenses now cover m43 and smaller)
Barry_Green
Moderator
No -- it won't work at all on m43 lenses. It only works by taking a lens designed for a larger format, and concentrating/shrinking that image down to a smaller sensor size. So basically you have to be looking at "full frame" lenses only.
John Caballero
Veteran
But then again you coud be able to make a M43 lenses closer to the BMC sensor size? Maybe?
Barry_Green
Moderator
Probably not; they probably wouldn't make the adapter to use m43 lenses as a source. There'd be very little to gain.
Theoretically possible, but practically impossible... the BMC will only come in EF and M43 mount sizes. The speedbooster as designed cannot adapt a lens back onto its original mount, because the flange distance would change. It can only be used between a lens with a comparatively large flange focal distance and a (mirrorless) body with a comparatively short flange focal distance.
That said, there are plenty of optical adapters to adapt lenses with shorter flange distances to bodies with longer flange distances, ie Canon FD lens to Nikon/EF, etc (usually optically terrible, but they do exist). If such a product were financially feasible, eventually someone could develop such a thing with an integral reducer, or reducers with identical mount, male and female, on both ends (like current teleconverters). That's a pie in another sky, though.
That said, there are plenty of optical adapters to adapt lenses with shorter flange distances to bodies with longer flange distances, ie Canon FD lens to Nikon/EF, etc (usually optically terrible, but they do exist). If such a product were financially feasible, eventually someone could develop such a thing with an integral reducer, or reducers with identical mount, male and female, on both ends (like current teleconverters). That's a pie in another sky, though.
nyvz
Veteran
Yeah m43 lenses are generally designed primarily for size and price. Look at the 14-140 f4.5-5.8, for example, and compare it to the amount of light coming through an equivalent full frame lens like a 28-300 f3.5-6.3. If you were able to harness all that light onto a m43 format sensor with the same size image circle as the 14-140 using a 0.5x reducer, it would be a 14-150 f1.75-3.15! It's a design that lets in 6x more light!