You know, our photography department should have you write their proposal for replacing their outdated fleet of 1DIII with the new 1DIV. I'm sure you'll be able to convince our boss the benefits of what the new bodies can do where the old ones can't.
Getting a tad fed up of sarcastic comments. Some people it would seem would be happy if Canon updated every 20 years or so.
The 1DMk4 is hardly new, it's older than an iPad 1 at 18 months.
What about no updates, ever? Happier now? Wow, i can do sarcasm too.
As I've said repeatedly, IF YOU are happy, or your department is happy with a 3 year or longer cycle, go for it.
Keep your cam till it's dies after years and years, and replace it with the same one if you like, I couldn't care less.
I have no issue with that. It's your choice to be in that environment. I don't want that. I want to give Canon money more often, they just don't seem to want it.
And if you have do a problem getting your bosses to buy current kit, get a new boss or become your own, because the fast moving independent photographer is eating this dusty industry alive, and it's easy to see why.
What kind of improvement do you expect on a pro camera after "only" 18 months? Do you have any idea of the cost to develop new technology? Your 1 stop improvement for half step camera + 2 stops for next full step camera is just a joke and so ridiculous...
Look at the APS-C Canon cameras. They are almost all using the same sensor since 2 years now, because developing a new sensor is VERY expensive, difficult and requires time. So the only thing they improve is body/ergonomics/electronics.
So is that what you want in your 5Dm2.5? A tilting screen and 1 or 2 more buttons? Because that's all what Canon would offer to you for the same price. Then, happy you, you paid 3k dollars to have the same camera with slightly improved ergonomics. Excuse us, not so rich people, to prefer to keep or money for the next real upgrade.
What you ask to canon now is to develop 4 new FF sensors every 18 months, plus the new APS-C one(s) of course that are the real one(s) to bring money to Canon. OK, so be ready to pay 10k dollars each FF camera, because that's what it would cost.
If spending 10k dollars every 18 months is not a problem for you as you suggested earlier, why don't you also buy a Nikon Camera to do the job you need in low light if not happy with Canon. That would be the price to have the full Nikon set, and for the following years you can enjoy just changing bodies when they come out from the brand having the best offer.
By the way, why do you think no still camera can offer all the video options you and some other videographers are asking? Because it is today technologically impossible! Big sensors such as FF cannot have the same read speed as small sensors (cf rolling shutter). I am not saying it will never be possible, but until today, it was not, at least not at an acceptable price. Also, I wonder why there is so many people here complaining about video abilities of DSLR. Never saw so many videographers before, probably an american specificity. In Europe and Asia, people don't really care about doing serious movies with DSLR.
DSLR are not video-camera, have never been and it will never be their main purpose. That is just an option, a possibility. Do not expect much more. Especially for 5D series, which is a (semi-)professional tool for still photography