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Archive 2012 · Sigma DP2 Merrill: Have any of you tried it?
  
 
Mescalamba
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p.17 #1 · p.17 #1 · Sigma DP2 Merrill: Have any of you tried it?








Herb1911 pic, same I reposted before..

If this isnt color shift, then what it is? I have more than good eyes for colors. Magenta in center and cyan corners are quite evident. Btw. SD1M does same with some lens, reason is IR filter.



Oct 17, 2012 at 02:34 AM
millsart
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p.17 #2 · p.17 #2 · Sigma DP2 Merrill: Have any of you tried it?


I don't know, some apparently see magenta and cyan, while I see a pretty image of a grassland area with some grazing animals and a body of water in the distance in the above image.

Does that mean there isn't a color shift there ? No, maybe there is, I personally don't see, but then again, I don't really go out of my way to look for things like that unless its radically apparent, such as when I tried to use a Contax 21mm on my NEX7...talk about a color shift!

If you have to really try to find it though, you have to ask, does it really matter enough to worry about ?

To each his own.....



Oct 17, 2012 at 03:34 AM
mpmendenhall
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p.17 #3 · p.17 #3 · Sigma DP2 Merrill: Have any of you tried it?


Most of the color shift in the DP2M images is in the "a" channel in Lab color space. Here's Herb's field photo if you zero out the "b" channel in Lab, keeping only the colors most sensitive to the shift. I think this may help to make the color shift more obvious; it shows the same pattern (magenta center to green corners) that I saw with my grey card tests. In the full-color original, the shift is most obvious to me in the clouds, changing from magenta to green tones; in the grassy areas, under a lot of their own real color variation, the subtle shift is nearly impossible to notice.








Oct 17, 2012 at 04:09 AM
sebboh
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p.17 #4 · p.17 #4 · Sigma DP2 Merrill: Have any of you tried it?


millsart wrote:
There becomes a point where you have to wonder if the viewer is looking at the image or simply at the pixels.

A question of what is the actual scene of verses looking for things like blotchiness and color shifts.

If one simply wants to have images that show color shifts, edge sharpness, etc, then it would be far less effort to simply stay inside and shoot some plain white walls rather than make the effort to go outside, hike to a nice scene and try to compose a pleasing photo.

Obviously this is a gear/technical based forum at its core, but I
...Show more

but looking at the pixels rather than the pictures seems to be the main point of the dp2m. the AA less bayerlessness makes 100% viewing look so much better, but to be honest i'm not seeing any major differences at web sizes. maybe i would in print.

it just seems like a camera designed specifically for people that care deeply about pixel peeping, so i'm not surprised to see people caring deeply about the minutia.




Oct 17, 2012 at 04:09 AM
timpdx
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p.17 #5 · p.17 #5 · Sigma DP2 Merrill: Have any of you tried it?


Gosh, that is so subtle, even in the sky, I doubt anyone besides me would EVER see that in a nice large print. We may nitpick, while clients will walk up to my sharp 36" print and just go wow. Will have my DP2M tomorrow, can't wait, despite all the negativity here.


Oct 17, 2012 at 04:12 AM
contas
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p.17 #6 · p.17 #6 · Sigma DP2 Merrill: Have any of you tried it?


sebboh wrote:
but looking at the pixels rather than the pictures seems to be the main point of the dp2m. the AA less bayerlessness makes 100% viewing look so much better, but to be honest i'm not seeing any major differences at web sizes. maybe i would in print.

it just seems like a camera designed specifically for people that care deeply about pixel peeping, so i'm not surprised to see people caring deeply about the minutia.



Showing an imperfect spot of a picture or a bad action is an endless process of a progress life and nothing is mean or minutiae. What you can see from DP2M now , other people get that look for a decade ago since SD9, so no surprise for them that detail and color, you are newcomers (to Foveon ) and posted and said "wow" to bad pictures, so what do other do?Let you do it again and again?You now tell yourseft what should you do?



Oct 17, 2012 at 05:05 AM
sebboh
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p.17 #7 · p.17 #7 · Sigma DP2 Merrill: Have any of you tried it?





Oct 17, 2012 at 05:27 AM
millsart
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p.17 #8 · p.17 #8 · Sigma DP2 Merrill: Have any of you tried it?


contas wrote:
What you can see from DP2M now , other people get that look for a decade ago since SD9, so no surprise for them that detail and color, you are newcomers (to Foveon ) and posted and said "wow" to bad pictures, so what do other do?Let you do it again and again?You now tell yourseft what should you do?



By my very definition, if an image makes me say "wow" and want to take another look at it, it simply can not be a so called "bad picture".

Do you really think someone should change their opinion of what they like or don't like because someone on the other side of the world has a differing opinion ?

Everyone is free to make up their own minds and choices. If I enjoy "bad" photography, or gross food, or listen to horrible music, its all because it is what I enjoy, and darn well I'm going to do it again and again, because that is my right to do so.








Oct 17, 2012 at 06:09 AM
carstenw
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p.17 #9 · p.17 #9 · Sigma DP2 Merrill: Have any of you tried it?


Perhaps CornerFix would be good here?


Oct 17, 2012 at 07:49 AM
contas
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p.17 #10 · p.17 #10 · Sigma DP2 Merrill: Have any of you tried it?


OK, purple (fringing), magenta (casting), green (casting) are nightmare colors.Whenever I saw them on my Foveon (Raw or Jpeg) pics, I searched for their origine, and drawed a tiny conclusion for the next shooting.These colors give the images a cheap looking and unforgivetable feeling for the wellknown Foveon and Zeiss lens .
Cornerfix gives a weak green edge correction and it's still there after fixing, so no real cure this time.Don't know other's experiences?.



Oct 17, 2012 at 08:05 AM
 

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pingflood
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p.17 #11 · p.17 #11 · Sigma DP2 Merrill: Have any of you tried it?


carstenw wrote:
Perhaps CornerFix would be good here?


Beat me to it, if the color shifts are consistent couldn't you just use this to fix it?



Oct 17, 2012 at 09:25 AM
dmbphotography
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p.17 #12 · p.17 #12 · Sigma DP2 Merrill: Have any of you tried it?


For anyone in Australia, they are very hard to get. I was told C.R.Kennedy ( Sigma dealer) was getting a shipment in this week, only to get an email saying the shipment wasn't even enough to cover the backorders and if I still wanted one, I would have to wait another month with full payment up front.

Needless to say, I just ordered from B&H.

Ps...Im selling an original DP2 if anyone is interested -



Oct 17, 2012 at 11:46 AM
pr4photos
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p.17 #13 · p.17 #13 · Sigma DP2 Merrill: Have any of you tried it?


I've got an original DP1 for sale on ebay (UK) if anyones interested. Fantastic camera, but too slow for my needs


Oct 17, 2012 at 12:08 PM
inglis
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p.17 #14 · p.17 #14 · Sigma DP2 Merrill: Have any of you tried it?


While I am probably too color blind to be bothered by these colors, I do find it more than interesting to see what others do to lessen or remove them.


Oct 17, 2012 at 01:29 PM
andyjaggy82
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p.17 #15 · p.17 #15 · Sigma DP2 Merrill: Have any of you tried it?


I admit it, after trying really hard I still can't see the color shift. You guys must have super eyes.


Oct 17, 2012 at 02:48 PM
FlyPenFly
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p.17 #16 · p.17 #16 · Sigma DP2 Merrill: Have any of you tried it?


Even only on my iphone5 it's easy to see the shift in the lay recent example


Oct 17, 2012 at 02:54 PM
andyjaggy82
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p.17 #17 · p.17 #17 · Sigma DP2 Merrill: Have any of you tried it?


I see a shift in the sky on the right side where it seems to go slightly cyan, but to me it just looks like a natural gradation in the sky color that happens as you get closer to the sun. I think it might be easier to see the problem if it was a different shot.


Oct 17, 2012 at 03:20 PM
Herb1911
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p.17 #18 · p.17 #18 · Sigma DP2 Merrill: Have any of you tried it?


I revisited for my own learning process one of my earlier posted images which has color shift according some posters.

This time I used my latest insight in color adjustments for X3F files as posted yesterday.

To see if their is any green or magenta in the sky I removed the aqua and blue color completely and maximized the magenta, purple and green color sliders.

I did not do any gradient on the sky nor any vignette or color adjustments other than my basic preset for overall color.

Herb





Groningse Wad







additional color setting for above picture







Lab color Lightness and a channel







Lab color Lightness and b channel




Oct 17, 2012 at 05:49 PM
Herb1911
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p.17 #19 · p.17 #19 · Sigma DP2 Merrill: Have any of you tried it?


Colorshift.

Sony Nex 7 with Novoflex adapter / Leica Super-Elmar M 18 mm f/3.8 @f/8.
A lens that has been designed with digital in mind; the Leica M8.

Herb




Moonrise over Drenthe




Oct 17, 2012 at 06:31 PM
timpdx
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p.17 #20 · p.17 #20 · Sigma DP2 Merrill: Have any of you tried it?


Now THAT ^^ would bother the heck out of me, the DP2 is so subtle, but the NEX/18mm is pretty horrible


Oct 17, 2012 at 06:44 PM
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