Originally posted by ElJamoquio You aren't going to use f/1.4 very often on FF - which is why you'd use a f/1.8 or so, still stop it down.
The D800 sensor specs (including test performance) make the sensor look very much like an 'expanded' k-5/d7000 sensor. As such when you make DOF equivalent and shutter speed equivalent the signal:noise ratio will be equivalent. I know that isn't obvious but when you go through the math based on the real data that DxO provides us, it is equivalent.
Ho wait shutter speed equivalent surely you mean film speed equivalent.
If i shoot with 35mm f/1.4 on APS-C then shutterspeed of 1/50 will do perfectly for 50mm f/1.8 on FF you want 1/50 as well now comes the fun part the different aperture so K5 at ISO400 - D800 at ISO800 (dark room
) to compensate, i wonder if there is still any noticeable difference then in image quality, sure you got more pixels with the D800 so it will still probably do slightly better but for 3 times the price...
Also there is an age differnce between the two, K5 is end of life while the D800 is just launched
We have also been looking at lens prices the FF can compete with but for example the equivalent of these
Pentax DA* 200mm f/2.8 - $965
Nikkor 300mm f/4D - $1,370
cannon EF 300mm f/4.0L - $1,360
So is APS-C set really more expensive in total?