Interesting article on DxO about 5D III and D800 resolving power

Started Apr 4, 2013 | Discussions thread
John Sheehy Forum Pro • Posts: 19,914
Re: Don't get your meaning?

Just another Canon shooter wrote:

John Sheehy wrote:

Just another Canon shooter wrote:

The whole point is that you can't. The Nokia is a Zeiss designed lens. You think that a better lens on the Nokia would match the Pentax and put all the MF manufacturers out of business?

Of course not.  There are other things that distinguish the cameras, such as a bigger sensor area on the MF for less noise, the ability to change lenses, have a lens hood, control flashes, etc.

The Nokia can go to ISO 58. Given the 1/1.2" sensor, the ISO is not that high in FF or Pentax terms.

The sample you show is certainly not the best the Nokia can do.  I've downloaded full 40MP JPEGs that were much sharper and less washed-out looking than the one you showed here, and you're showing features in the Nokia comprising far less pixels than they do in the Pentax; a flawed comparison.  The Pentax should have used a focal length at a ratio to the Nokia's, the same as the pixel pitch ratio.

So you are saying that the Nokia can actually match the Pentax IQ with an improvised hood, same FOV, etc.?

No.  Where did you get the crazy idea that I was saying anything like that?

My point is that the comparison is biased towards a camera that doesn't need any handicap.  The Nokia crops unfairly have about 40% of the number of pixels representing each object, and there is something wrong with the contrast.

I have a Pentax Q, and it has much pixels as small or smaller than the Nokia, and it is leagues better at the pixel level than the sample you gave for the Nokia.  So, either putting the Nokia sensor in a better implementation with a better lens, or extending the pixels of the Q to the amount in the Pentax 645 and using a good lens for the task, there would be a lot less difference from the 645, except that the noise will be more visible in the smaller sensor, but at base ISO, it is not something that you would readily notice.

The Nokia has a very big sensor for a cellphone, so I suspect that the Zeiss lens is jumping through hoops to have the lens so close to the big sensor, making the Nokia fail to make best use of its sensor.

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