The Olympus m43 bodies have IBIS in far smaller bodies and even if it was a size thing making the body a few mm bigger wouldn't be a big deal. I still think it is a flange distance issue, in which case they should have kept the alpha mount. The m43 bodies might get away with IBIS because the sensor is smaller and so the angles to the frame edge from flange are much shallower.
Sony A7/A7R mirrorless full frames
- Thread starter Mr.Stu
- Start date
The Olympus m43 bodies have IBIS in far smaller bodies and even if it was a size thing making the body a few mm bigger wouldn't be a big deal. I still think it is a flange distance issue, in which case they should have kept the alpha mount. The m43 bodies might get away with IBIS because the sensor is smaller and so the angles to the frame edge from flange are much shallower.
They don't have a full frame sensor so much easier to implement.
I don't see that making much of a difference. The sensors are going to be the same size, or even smaller since Olympus control 5 dimensions while the systems used in Sony alpha bodies a 2D pitch-yaw stabalisation. Likewise for the piezo actuators, perhaps a little bigger but if they only control pitch-yaw then far less of then. The fact that even the APS-C NEX cameras have no IBiS leads me to think that the short flange distance make sensor based stabalisation impractical or have undesirable side effects.
Soldato
- Joined
- 8 Aug 2010
- Posts
- 6,453
- Location
- Oxfordshire
Apparently the 10-18mm works well on the full frame mount. This is incredibly wide.
For shooting landscapes I really don't see why using an adaptor is a big deal anyway. If anything being able to use the best lenses of all the systems far outweighs having to use an adaptor.
For instance, the Canon landscapers complaining about not having a high res body and Nikon not having a 17mm TSE will be all over this. Just the ability to stop down the lens to get extra DOF without hitting the wall of diffraction is a MAJOR deal for landscapes. Now you can shove the camera close to an interesting subject, stop down to F22 and get EVERYTHING in focus while still being sharp. It enables a new ways of being creative without IQ suffering too much.
Soldato
- Joined
- 8 Aug 2010
- Posts
- 6,453
- Location
- Oxfordshire
That's what an olympus guy told me. Apparently Sony & Olympus are sharing tech, and splitting R&D costs.
Sony apparently (according to alpha rumours) are releasing at least another two FF mirrorless bodies in 2014.
Given that Fuji are rumoured to release a stabilised FF mirrorless, I'm pretty sure Sony will.
Soldato
- Joined
- 8 Aug 2010
- Posts
- 6,453
- Location
- Oxfordshire
If this is the case then you just compromise on the amount of stabilisation. Just design the sensor IS to deal with a 2-3 stops rather than 4-5 stops, or just smaller movements.
But maybe due to th flange distance IBIS has some negative side effects on larger sensors, perhaps that is why none of the NEX cameras do? I don't know but it is a strange omission in the whole sony mirrorless line up so it is reasonable to believe it is a technical challenge.
It might not be that simple and linear though. Any kind of move movement of the sensor relative to the lens mount may induce some kid of image aberration.
It is well known the short flange distances cause side to side colour and rendering issues if the lens is not designed for that distance (Leica digital cameras have been plagued by this).
Apparently Sony has a new micro lens array on the A7 that specially diffracts the lights in the sensors edges corners supposedly correcting for this issue. But perhaps if this micro lens assembly is moved relative to the lens mount then other rendering issues occur?
I don't know why but I find it strange.
the sony nex 7 had this issue as well, users had to be pretty careful about about lens choice wider than 35mm or so. They have pretty much eliminated this on the 16mp crop sensor in the nex 5r and 6. I've played with some voigtlander, contax g and leicia (borrowed) and not had any issues on the nex 6.
Hopefully the new FF sensors won't have the issue either but you can imagine the light at the corners on FF will be at an even greater angle than on crop.
Nice
If I shot landscapes etc. I'd be very tempted. Hell I was tempted anyway but the AF doesn't appear to be that great. So I'll be watching to see if firmware updates improve it or see what the A8 brings...
Soldato
- Joined
- 8 Aug 2010
- Posts
- 6,453
- Location
- Oxfordshire
I'm waiting for at least 9-11 PDAF points and some fast (F1.4) glass. Also would like a quiet shutter.
I tried the a7 in a shop with kit lens, focus speed was very impressive SLR like, in dull conditions too!, shutter Had silky sound. Lovely feel. Its very nice.
I think full frame is pretty tight on e Mount, not much wiggle room, could be why no ibis.
I think the nexes skipped ibis to have the smallest body possible tbh
I think full frame is pretty tight on e Mount, not much wiggle room, could be why no ibis.
I think the nexes skipped ibis to have the smallest body possible tbh
Soldato
- Joined
- 8 Aug 2010
- Posts
- 6,453
- Location
- Oxfordshire
^^^
Did you only test the centre AF point though?
The problem I have is I hardly ever use the centre point.
Did you only test the centre AF point though?
The problem I have is I hardly ever use the centre point.
I think the lack of in-camera IBIS is just due to lack of technology for it. Panasonic (the other main m43 brand) only just put it in one camera.
The news of Sony-Olympus partnership is still a little vague on how far they'll go. Does it mean they'll share cost of production or share R&D as well?
The news of Sony-Olympus partnership is still a little vague on how far they'll go. Does it mean they'll share cost of production or share R&D as well?
Likewise. At the launch event in Nashville results with the 50mm f1.8 were hit and miss. Kai says the A7r likes to focus on the background a lot, and others are reporting that the focus peaking implementation is useless... Ho hum.
Hi robj - where did you order the FE 35mm lens? I can't seem to find any UK stores that have any in stock any time soon. I have the A7R but I'm having to manage with adapters for now.
Nonsense, sony has had IBIS for years in the alpha line, and working on FF sensors as well. Panasonic preferred to use optical stabalisation, Olympus used IBIS for all their m43 mirrorless cameras. The reason it isn't in the A7(and NEX) is technical. The question is whether that can be overcome in the future.
The main difference with these mirrorless cameras would be the change in flange distance so that would be my bet on causing issues. When angles are extremely acute ibis probably screws up.
Soldato
- Joined
- 8 Aug 2010
- Posts
- 6,453
- Location
- Oxfordshire
Both I was told when I spoke to a guy at a wedding back in July. Apparently he is pretty high up at Olympus.
He started talking to me about camera's and wanted to know more about the gear I was using and why.
He showed me his Oly. I said I like the tech but would never buy one. He asked why? I said the sensor is too small/wrong aspect ratio.
He seemed surprised that sensor size was such a big deal.
I then told him Oly should move to FF if it wants to be able to compete in the longterm. I said I thought FF will be pretty standard eventually, with mirrorless medium format replacing 35mm DSLR's in the professional market, and if anyone is in a position to do so it would be Sony.