Review - The Sigma dp3 Quattro - For the color connoisseur

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here.  See the reflection of the (red) scaffold section in the water.

Good boy, yes keep attacking the messenger, not the message.

sign of a very smart person !

so what about the message ?

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!?????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

xpatUSA wrote:

KrampusClaus wrote:

guys come on just look at the OP pics push the 'original' button and look at 100%, it is so obvious even moron Trump could see it !!!

and as I said, i suspect it processing but then do not have the raw, and never have seen this in any 'merrill' that I looked at, but that is a limited # of pics, but the one thing i admired about the merrill sensors, ability to use at 100% which is very impressive compared to bayer sensors.

so stop criticizing the messenger, GO LOOK FOR YOURSELVES !!

how hard is it to do ????

A classic barely-intelligible response almost to the point of "flaming"!

Long lines in lower case with a bare minimum of punctuation.

Actually capitalizes "Trump" but disrespects Richard B Merrill by not so doing.

An excess of multiple exclamation points and question marks.

Lazy use of the pound sign to mean "number".

"Shouting" with caps (finally the shift key springs into action!).

And ending with a rhetorical question that implies that we're all dumb.

Unfortunately I won't be able to read your inevitable aggressive response

Lobbamobba wrote:

Its an extreme test shot pushed beyond any reason. You should not use it to determine iq of any camera using such a shot. Because it makes no sense.

I've enjoyed your videos and it's nice to see that you're enjoying the dp3 also; I really like the 75mm equiv. focal length for landscapes which has come as some surprise.

When you say that it's an "extreme test shot," do you mean that it was purposely underexposed? Because that's not a torture test for Quattro under normal circumstances – I think that's why people are commenting regards IQ.

Cheers,

Tom.

digi2ap wrote:

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here. See the reflection of the (red) scaffold section in the water.

I hadn't noticed that while singing the praises of the original image . .

And the vertical pole.

Could it be optical, similar to but not the same as veiling flare?

Lobbamobba wrote:

This.

Excellent!

xpatUSA wrote:

digi2ap wrote:

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here. See the reflection of the (red) scaffold section in the water.

I hadn't noticed that while singing the praises of the original image . .

And the vertical pole.

Could it be optical, similar to but not the same as veiling flare?

Maybe! Don't know. Had thought it colour bleeding caused by noise reduction.

digi2ap wrote:

xpatUSA wrote:

digi2ap wrote:

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here. See the reflection of the (red) scaffold section in the water.

I hadn't noticed that while singing the praises of the original image . .

And the vertical pole.

Could it be optical, similar to but not the same as veiling flare?

Maybe! Don't know. Had thought it colour bleeding caused by noise reduction.

I'm not saying that SPP does utilise NLM but... blotching is an artefact of applying NLM in CIELAB. I haven't witnessed it when using other forms of chroma NR. Colour bleed could be another but I haven't come across it in my limited testing.

The image is also suffering badly by the hands of a Median filter but the photographer has written that "it is not exposed in a way that one would normally capture that scene," so there's not much point judging IQ, it's a test.

digi2ap wrote:

xpatUSA wrote:

digi2ap wrote:

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here. See the reflection of the (red) scaffold section in the water.

I hadn't noticed that while singing the praises of the original image . .

And the vertical pole.

Could it be optical, similar to but not the same as veiling flare?

Maybe! Don't know. Had thought it colour bleeding caused by noise reduction.

Ah, yes, the ever-present NR, I has forgotten about that. Where nearby pixels are used in the process . .

Scratch that, looking more likely that SPP uses a Bilateral filter for chroma NR.

digi2ap wrote:

xpatUSA wrote:

digi2ap wrote:

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here. See the reflection of the (red) scaffold section in the water.

Tony, found this which mentions the origin of the the phrase 'beer garden' effect:

http://sigma-rumors.com/2014/07/sigma-dp2-quattro-yellow-on-blue-issue/

xpatUSA wrote:

digi2ap wrote:

xpatUSA wrote:

digi2ap wrote:

I also think I still see the 'beer garden' effect or whatever the term was used when the first Quattro images were examined by forumites here. See the reflection of the (red) scaffold section in the water.

Tony, found this which mentions the origin of the the phrase 'beer garden' effect:

http://sigma-rumors.com/2014/07/sigma-dp2-quattro-yellow-on-blue-issue/

Yup, Quattro reds and yellows are noisy and presuming that chroma NR is performed in CIELAB or similar, then Bilateral's edge-preserve wouldn't work brilliantly because Quattro's top layer is near blind in this scenario.

This is why I've complained of Quattro's variable chroma and luminance resolution, some things it just doesn't see

Yellow text on blue banner, edge detection using Luminance won't be too successful here.

historianx wrote:

Lobbamobba wrote:

And no Merrill for me.. Quattro or Classic is my melody

Agreed. I do a lot of portraiture and the Quattro skin tones are much better than any I got out of my long-gone DP3 Merrill, which were ghastly.

Any particular type of skin tones or were they all bad? (just bought a DP2M, hence the question).

https://en.wikipedia.org/wiki/Human_skin_color#Genetics_of_skin_color_variation

http://agi32.com/blog/2014/06/25/in-the-blood/

historianx wrote:

Lobbamobba wrote:

And no Merrill for me.. Quattro or Classic is my melody

Agreed. I do a lot of portraiture and the Quattro skin tones are much better than any I got out of my long-gone DP3 Merrill, which were ghastly.

My only compliant about the Quattro line are easily-blown highlights, but there are workarounds.

I find that the highlights in the sdQH raw files are not at all easily blown, when the files are processed in SPP. Very much better than the DP3M.

DNG files might be more difficult. I use these only for copying film negatives, which are low contrast.

xpatUSA wrote:

historianx wrote:

Lobbamobba wrote:

And no Merrill for me.. Quattro or Classic is my melody

Agreed. I do a lot of portraiture and the Quattro skin tones are much better than any I got out of my long-gone DP3 Merrill, which were ghastly.

Any particular type of skin tones or were they all bad? (just bought a DP2M, hence the question).

https://en.wikipedia.org/wiki/Human_skin_color#Genetics_of_skin_color_variation

http://agi32.com/blog/2014/06/25/in-the-blood/

SPP Settings below, that worked the best for me for flattering skin tones/detail with the DP2M.

Chroma NR slider position : 1

Luminance NR slider position: 3 or 4

Sharpness slider: -1.3

It's best to have a correct custom white balance if possible (too greenish with all the default WB) especialy with the DP1M and DP2M.

The DP3M has far better color in that regard.

WalidPK wrote:

xpatUSA wrote:

historianx wrote:

Lobbamobba wrote:

And no Merrill for me.. Quattro or Classic is my melody

Agreed. I do a lot of portraiture and the Quattro skin tones are much better than any I got out of my long-gone DP3 Merrill, which were ghastly.

Any particular type of skin tones or were they all bad? (just bought a DP2M, hence the question).

https://en.wikipedia.org/wiki/Human_skin_color#Genetics_of_skin_color_variation

http://agi32.com/blog/2014/06/25/in-the-blood/

SPP Settings below, that worked the best for me for flattering skin tones/detail with the DP2M.

Chroma NR slider position : 1

Luminance NR slider position: 3 or 4

Sharpness slider: -1.3

It's best to have a correct custom white balance if possible (too greenish with all the default WB) especialy with the DP1M and DP2M.

The DP3M has far better color in that regard.

Thank you.