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Author Topic: Should we shoot in the DxOMark sharpness resolution?  (Read 1436 times)

Offline SnS

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Should we shoot in the DxOMark sharpness resolution?
« on: February 28, 2016, 11:33:05 pm »
According to DxOMark, a combination of a Canon EOS 6D and a Canon EF 24-105mm f/4L IS USM lens has a sharpness of around 14 Mpix (well, actually P-Mpix, but it's just meant to be like an equivalent, right?). So does this mean that there's no advantage from shooting at a resolution greater that 14 Mpix, the actual "quality"/sharpness/resolution of the pictures is capped at 14 Mpix, or is it like a proportional value, and shooting at a lower resolution will yield even lower sharpness results (like shooting at 10 Mpix will result in a 7 P-Mpix image)?

Please try to concentrate on answering the question, if you understand it, and not questioning the terms used.

Offline Bilbo

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Re: Should we shoot in the DxOMark sharpness resolution?
« Reply #1 on: February 29, 2016, 09:37:19 am »
Measured sharpness is monochrome sharpness. If an objective is said to resolve X Mpix, the Bayer sensor which captures "best image" should have some 4*X Mpix - because of sparse structure of the sensor. X-Trans is similar to Bayer in this terms.
(if you are using colour and not converting to BW of course)

Regarding the "resolution" setting in the camera: there is same counter-argument against using resolution lower than maximum resolution as using lower resolution with LCD monitor. CRT monitor does not have discrete pixels, LCD has. Film does not have discrete pixels, silicon sensor has. Downsampling by anything other than 1/4, 1/9, 1/16, 1/25 etc means loosing resolution.
« Last Edit: February 29, 2016, 12:53:43 pm by Bilbo »

Offline Gastonshon

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Re: Should we shoot in the DxOMark sharpness resolution?
« Reply #2 on: August 04, 2016, 09:04:05 am »
Do not be surprised if you are told what you have to offer will become known and popular in the future.

Offline Somsak

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Re: Should we shoot in the DxOMark sharpness resolution?
« Reply #3 on: March 21, 2017, 08:15:35 am »
This lens is very sharp lens is very useful.

Offline photoart

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Re: Should we shoot in the DxOMark sharpness resolution?
« Reply #4 on: June 28, 2017, 04:18:23 pm »
I am not sure this is the place for this question but I was reading a thread where the 7D Mk II sharpness was being debated since there was some confusion with DXO's results from one camera to another.  I am about to upgrade my camera from a Rebel T5 to a 7D Mk II and am trying to find out if I am doing the right thing.

From what I can gather, I am doing the right thing but some confusion about the image quality was mentioned which confused me.  My question is am I doing the right thing? Are there any negatives on this camera which I should be aware of before I buy?

Thanks very much for any response and again, sorry if I am in the wrong thread.