There are several (Doug has explained one above) - I thought they were common knowledge - google it - you'll find lots about it!
I don't think any of them are particularly important, but they are there.
Hi Jono, the above comes across to me as mildly condescending. I am sorry to have to point that out.
Above, you yourself seem to acknowledge that reference to the issues with EFCS is a red herring.
By cavalierly stating about EFCS that "nevertheless it does cause issues" without stating what those issues are you seem to be employing the FUD (Fear, Uncertainty, Doubt) method, first perfected my Microsoft.
I am quite familiar with the advantages and disadvantages of EFCS and use EFCS on my A7r2 to great benefit. No need for me to google. Thank you.
Well, 'shutter shock' needs to be distinguished from 'camera shake' - it's pretty clearly defined (and pretty conclusively cured with later Sony A7 cameras and with firmware in the E-M1) - but I'm not aware of any cameras without moving sensors which suffer from it (but I'm absolutely willing to be proved wrong - it was only a throwaway remark) - at any rate, both Olympus and Sony seem to have cured it.
Sorry, Jono, but you seem simply ill informed about this point. For a beautiful shutter shock example with the no-IBIS A7r you need to look no further than here.
http://www.getdpi.com/forum/sony/49470-a7r-why-im-keeping-3.html#post557838
This discussion arose around the weight of the SL and whether it had any impact on steadiness - Robert thought it didn't, others that it did. . . . .
Look at it this way (and then I'll shut up)
Sony brought out the early A7 cameras whose trademark was they were small and light, full frame and with excellent resolution - a real tangible step forwards.
However - the early versions were criticised for being very subject to camera shake, and with more lag than was desirable. To cure these issues they implemented IBIS and EFCS - and cure it they did - Excellent
Although I have experienced really bad shutter shock with my A7r I have never had a similar experience with my A7r2.
So indeed Sony seems to have that issue addressed successfully. But I rather doubt IBIS has anything to do with that.
Simply using the A7r2 on a tripod with IBIS off and EFCS on for shutter speeds slower than about 1/1000 s avoids all potential shutter shock and EFCS issues as far as I can tell.
For faster shutter speeds the mechanical shutter on the A7r2 seems to work just fine.
The SL comes along, and it doesn't have IBIS or EFCS . . . and it's being criticised here for not implementing these technologies . . BUT it's not actually susceptible to shutter shock, or, it seems to me, to unreasonable camera shake, and the lag is extremely small (at least as good as the second generation A7 cameras). So it seems to me that Leica have solved these problems in different ways (perhaps by making the camera bigger and heavier, and by having a very quiet shutter), and there isn't much point in criticising the camera for missing technology which it doesn't appear to need.
Jono, I have no reason to doubt your statement that Leica has managed to employ an excellent shutter in the SL. Congratulations!
Inquiring minds simply would like to know how it works in principle.
There are advantages in a fixed sensor as Godfrey has pointed out in terms of sensor cooling (which is relevant for noise), and of course, simplicity has some rewards. It suddenly occurred
Indeed I agree. The makers of cameras with IBIS have to work harder and employ more advanced technologies to keep their sensors cool. And they do, but it's still a challenge.
. . . . But then there is IBIS - which is thoroughly desirable with 3rd party lenses and would be wonderful with R telephoto lenses - it's a really sad omission . . no question . . and before using the SL, just like you, I said I'd never buy a camera without IBIS again - but 3 months with the SL convinced me that in this case I can shoot steadily with M lenses, with the R lenses for macro, and for my fairly limited telephoto requirements I'll wait for the 90-280. So I bought the camera and kit zoom . . . . . . and I don't have issues with blurred photos.
Well, congratulations on your choice of camera. It seems to serve you well. Your pictures prove that.
Your hands must be a lot steadier than mine. So tripod use or IBIS for freehand use is a must for me.
What I most appreciate about IBIS is that it gives me a stabilized image when manually focusing my Leica R lenses freehand.
I'm not criticising Sony or Olympus in any way (whatever problems they had in this area they have clearly fixed with new technology)- and I'm certainly not trying to spin - just to point out that the SL doesn't appear to need these esoterics to take steady pictures.
Well, for me IBIS, 42 MP, and an BSI sensor are not esoterics. I derive benefit from all 3 features.
It will be interesting to see which features Leica will implement in their R-SL adapter.
If the future adapter could automatically stop down the lens after it was manually focused that would be a tremendous advantage.
