Originally Posted by
Arg
Unlike a few others here, I don't have any trouble understanding that dolina is asking what specific photography justifies choosing these over a low-20's MP or even mid-30's MP full frame camera.
Originally Posted by
ricktas
Unlike others, Dolina did not specifically ask what justifies these over others.
There are no questions from Dolina re the need for the higher pixel count, like you have wrongly implied.
Originally Posted by
dolina
As Arg and others have pointed out all types of photography can use any MP camera available in the market so why spend 2x the price of a 5D3 for a 5DSR?
Yes that's what I thought you meant. Thanks for clarifying.
A lot of people will be buying them because they have Canon lenses and it's time to leapfrog Nikon again. Big numbers and market-leading specs have hypnotic power over buyers -- any cursory analysis of sales of any technical product will confirm this. But that won't be the reason given by actual buyers of course!
Like you, I'll be interested to hear from actual purchasers.
While we wait, let's hear from DPR editors after talking to Nikon's senior engineering and design team (emphasis added by me):
"We spent quite a lot of time in this interview talking about two challenges facing DSLR makers in an era of 24MP+ resolution sensors. Namely, AF accuracy and shutter/mirror vibration-induced softness.
Both of these problems are largely side-stepped in mirrorless designs (although it took many manufacturers a while to really address shutter shock, and cameras like the Sony a7R have still not remedied this issue). Starting with autofocus, as a consequence of their reliance on off-sensor phase-detection AF modules, all DSLRs are vulnerable to AF inaccuracies. These issues become more and more noticeable at higher capture resolutions, and with faster lenses. High-end DSLRs tend to offer some kind of AF fine-tuning, but it's a cumbersome process, and only valid for one subject distance and one focal length.
"....The other major challenge faced by DSLR manufacturers is shutter/mirror vibration-induced softness. Flagship products like the D800-series must be shot very carefully if mirror and shutter-induced softness is to be avoided at certain shutter speeds. And though Nikon's redesign of the mirror and inclusion of electronic front curtain in the D810 is a huge step forward,
the reality is that it's still practically difficult to get the most out of these high resolution sensors. The D810 in particular has usability issues around its otherwise excellent electronic front curtain in that it's limited to Mirror Up mode. Furthermore,
all high resolution offerings from all brands exhibit deleterious interactions between mirror/shutter vibrations and optical stabilization systems (our initial tests of the Canon EOS 5DS show that it is no exception).
"In the end, this requires a meticulous approach to shooting, or often limiting yourself to certain shutter speeds, in order to maximize the resolution offered by these sensors.".
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