With IS in the lens (which is less likely to fail, just a single grain of dust in the piezo elements will fry them easily, that's what I meant with higher precision, it's a more fragile system) I can take a film body any day and still have IS and thus know how my system will behave whereas you will be used to relying on AS which isn't there on the film body.
Now let's put that movement when IS is off into the perspective of the AF sensor size and it's movement is bad enough at 400mm to be picking up the wrong part of the picture.
I did the other day (well I normally shoot even my long lens without IS eventhough it has that feature because I am quite versed at hand holding that focal length. But the movement was enough to have AF miss at times in challenging situations.
The same as today: Mount the lens on a really sturdy tripod/head and shoot at whatever shutter speed the subject demands. You praise the AS as the holy grail of photography. Neither IS or AS is, they are helping in situations where a tripod may not be helpful and that's for me only in panning at relatively low shutter speeds - and that's only because I still haven't made up my mind which tripod head will be better for my useage: the Wimberly sidekick or the full fledged Wimberly gymbal head. After buying that I have no use for IS anymore.
I don't even really like IS - it's a natural system to use if you insist on skimping on the basicis, but I still think IS/AS/OS is a cludge with AS being the worst because it falls short of really helping the photographer design his shot (no viewfinder stabilisation) and it's even drawing attention away from the framing of photograph having to look at the LED efficiency indicator.
And comes in the form of monopods and proper technic.
Which comes in the form of tripods and proper technic. Sorry but you don't know what you are talking about.
And he'll get blurred shots not because they suffered from had hand shake but because the subject moved faster than the reduced shutter speed (which the non-pro doesn't apreciate) would freeze sufficiently. In exactly those situations IS and AS both are a distraction from proper technic, which would be to up the shutter speed to reduce hand shake and at the same time would be sufficient to stop the subject movement from blurring the shot.
Heh. You must really be waving your lenses around. I repeat, in typical stabilized shots (two-three stops longer than usual) movement is pretty slight. When following birds in flight, to take your earlier example, the slight vibrations are the least of your compositional problems.
Then don't look at it. It is visible enough to be viewable with the peripheral vision.
You have no proof for this lesser reliability, and have no idea how the actual units are sealed, neither in AS or IS. Canon, Nikon and Sigma also uses piezo actuators. The AS actuators in the A1/A2 must be even more fine grained but yet I have heard of very few failures, despite the cameras being sold in way numbers than the 7D. You are just waving your hands here.
Not with the IS lens broken and on repair, you can't. Is your position that a functioning lens with IS and a digital camera is better than a non-IS lens and a broken digital camera with AS? Wow, must have taken some real thinking to get to that argument.
Guillaume
Well I have and I did perfectly well. I don't apply photojournalist style to it though. If you had shown up with that style at my wedding I would have kicked you out in the first 15 mintues!
I can tell you that I have shot several weddings this year; in all cases, AS made for some stunning available light shots. I rarely carry a flash anymore. I have never been that hot about stabilization, not needing it (yet!) for my type of wildlife shots, so I was never very interested in getting stabilized long lenses -- still, when the 7D came out, I bought it and checked out the stabilization system.
Game, set, match. Please do indicate if you have arguments at a later time.
Are you serious? Of course they have tested the cables for many, many years of usage. AS operation is intermittent, it's only needed to operate the AS mechanism in the lab continously for a couple of hours to get a simulation of several years, and hundreds of thousands of shots.
hmm... why? what up with the "style" ?
AS can and does fail, but according to KM it was designed to be more robust than the shutter. KM has had AS for a while now in their digicams and I have not noticed a high number of failure complaints.
LOL - my nieces saw my wifes 66 Mustang and asked what those funny handles were on the doors! (They were window cranks, they had never seen them before, god, I feel old
)unless of course the technology is good enough where the body can read the lens and the IS can act accordingly. shrug
