Reading mode: Light Dark

DP2 - Still green cast - worse than DP1?

Go to last post
E

Echodyne

Well-known member
Messages
174
Reaction score
17
Location
Frankfurt am Main, DE
I saw this comparison of DP1 and DP2 on pbase.com:
http://www.pbase.com/rickdecker/image/111725975/original

It looks like as if the DP2 creates even worse green casts than the DP1. Compare the color of the cars taken by each camera and let me know what you think.

I thought the green cast issue was supposed to be solved with the DP2. Or were these images simply not processed with the latest version of Sigma Photo Pro (3.5)?

Do not know what to think... any clues?

--
My Flickr Photostream: http://www.flickr.com/photos/echodyne
 
SandyF said:
SandyF said:
Do not know what to think... any clues?
Click to expand...
depends too what color the cars actually are...
and camera settings
and photo processing
and other variables.
Click to expand...
Car tires usually don't show green casts.

What I'm wondering though, is this the "green vignetting" we know from the DP1 or is it something different? Since clearly it's not only in the edges, but the whole frame. Might be the white balance or something.
 
...and if everything else fails, just convert to B&W and be done with complaining....

Cheers

Richard
 
on my monitor the DP2 shots simply seem more ... well, aqua... rather than green... in the grey areas... note the garage (?) floor grey, body color, etc.

my best guess is we're going to see lots of variables in how people set up and shoot the cameras, white balance used when, where, what modes, especially white balance auto vs sunlight vs .... processing the photos etc.

the modes (ref the other threads) vivid vs natural vs landscape will probably just add more variables. I'd be interesting in reading on photos what settings people use as well as simply seeing the photo. Modes, white balances, metering, don't show up even in EXIF info.

I may go outside again and shoot my backyard dogwood DP1 in auto wb, sunlight wb and custom wb just to compare ...

Best regards, Sandy
[email protected]
http://www.pbase.com/sandyfleischman
http://www.flickr.com/photos/sandyfleischmann
 
The DP2 colors are a lot more intense which makes me wonder if the "enhanced color" mode was used.
 
SandyF wrote:
....
SandyF said:
I may go outside again and shoot my backyard dogwood DP1 in auto wb,
sunlight wb and custom wb just to compare ...
Click to expand...
Just for the record:

I tried... but the sun's not right to do the sample series at ISO100 and F8 it's 6pm here... and the breeze has increased (thank goodness, because it's been around 87 degrees here today!)

Dogwoods are bobbing around thus out of focus at the 1/50 type shutter speeds I'm getting with F8, so I'll reshoot tomorrow in mid-day sun. Suffice in sum: auto white balance is white-bluish okay, sunlight wb is much more yellow, custom wb is close to auto white balance.
white balance is a variable.
Best regards, Sandy
[email protected]
http://www.pbase.com/sandyfleischman
http://www.flickr.com/photos/sandyfleischmann
 
It's green all right - check the tread of the tires.

It's not on the edges - it's throughout the image. Who knows why. However, it seems that Sigma has not addressed the "green cast" issue.
SandyF said:
on my monitor the DP2 shots simply seem more ... well, aqua... rather
than green... in the grey areas... note the garage (?) floor grey,
body color, etc.
Click to expand...
--
Truman
http://www.pbase.com/tprevatt

 
Echodyne said:
It looks like as if the DP2 creates even worse green casts than the
DP1.
Click to expand...
The fender guards on the DP1 shot are almost perfectly neutral (e.g. 69,69,69). On the DP2 shot, they are more like 56,65,64.

--
Erik
 
You can't expect all these different monitors to show the same output. I am looking at a Apple Cinema display and I see the DP2 as being a tiny bit magenta, and the DP1 as being normal.

You have to take into account that the lenses themselves have coloration.

You want the DP1 and Dp2 to be exactly the same. This won't happen.

Product photographers typically would own "matched lenses" for their work. That is, they would purchase several 4x5 lenses that would be "matched" for coloration.

I think you should stop being dissatisfied or worried or whatever and just understand that lenses have coloration. Sigma lenses have a reputation for being yellowish. So, combine yellow with the blue sky and you get greenishness.
 
I'm seeing magenta too. I am not going to go so far as to say that there is no greencast issue but I myself have never had greencast images with my sd14 which i purchased about a month after its release. I do see in some peoples samples of either dp1 dp2 and sd14 a green cast but in the sample photos linked I didn't see anything. Maybe I am wrong but maybe its time some people get new monitors...
--
http://phaethon666.deviantart.com/gallery/
For those interested
 
Timberwolfpuppy said:
You can't expect all these different monitors to show the same
output.
Click to expand...
Right. So what you need to do is to:

1. use the eye dropper to actually measure the RGB values. This will be independent verification of what your (hopefully calibrated) monitor shows.

2. Adjust the DP2 images to a new gray point (e.g. add red.) Then see if the scene looks more neutral to you.
Timberwolfpuppy said:
I think you should stop being dissatisfied or worried or whatever and
just understand that lenses have coloration.
Click to expand...
There are several variables here:
  • it's likely this is still a pre-production camera and possibly beta SPP.
  • We don't know if any picture mode or other settings were used
  • Rick doesn't describe any particular attempt to match the white balance or colors exactly.
  • Rick has admitted to being somewhat red/green color blind, so he may not see the difference himself.
Anyway, it's premature to make any conclusions about the camera based on one set of samples when you don't know all of the details. Time will tell. If you must make a buying decision on the DP2 right this minute, then as with any new camera, you pays you money and takes you chances that there may be teething pains.

--
Erik
 
That's more like it. I'll try decreasing cyan for many of my DP1 images. When I process them in SPP, I usually move the colour point to the lower left hand a couple of notches. This removes much of the greenish cast I see and makes things more natural. SPP tends to add a greenish cast to images, particularly in Auto WB.
--
Archiver - Recording the sights and sounds of life
http://www.flickr.com/photos/archiver/
 
For me the DP2 image is clearly more saturated - Red tail lights are more red, blue car is more blue, the garage floor has a magenta cast, and if you look at the green and red bumper sticker on the Jeep there is obviously more contrast and saturation. As noted, the camera was focused on the Hyundai license plate - which is white in the DP1 and has a magenta cast and more saturation on the DP2.

But, as mentioned, this matters little as we know nothing about all of the other variables. WB?, in camera / SPP (version?) / LR, PP? I'm sure there was an attempt made in uniformity, but that's not disclosed in the link.

Personally, even if every variable is controlled, I see nothing that couldn't be fixed with a slightly modified PP workflow. I also sincerely doubt that there would be anymore uniformity in doing such a test between two DP1's than there would be between a DP1 and DP2.

I think the interesting thing about the comparison is the focal length - which could be simulated but is nice to see directly.
Echodyne said:
I saw this comparison of DP1 and DP2 on pbase.com:
http://www.pbase.com/rickdecker/image/111725975/original

It looks like as if the DP2 creates even worse green casts than the
DP1. Compare the color of the cars taken by each camera and let me
know what you think.

I thought the green cast issue was supposed to be solved with the
DP2. Or were these images simply not processed with the latest
version of Sigma Photo Pro (3.5)?

Do not know what to think... any clues?

--
My Flickr Photostream: http://www.flickr.com/photos/echodyne
Click to expand...
--
Gear Listed in Profile to enable more efficient searching.
 
The DP2 shots look magenta and more saturated to me. Which is interesting because I've seen a lot of cyan/green DP2 shots so far (all pretty saturated though)...

I have a feeling Sigma is trying to jump on the not-so-neutral-color bandwagon here. Which is a shame, because I like to start with a nice neutral good colored photo and go from there.

I think Sigma needs to dump these newfangled color modes and get back to basics again.

--
Jason

http://www.jasonhight.net
 
I put the photo in Lightroom, set correct white balance on white places and I must say, that DP1 and DP2 colors looks basically the same...
So don´t worry:)
 
Echodyne said:
It looks like as if the DP2 creates even worse green casts than the
DP1.
Click to expand...
Just for the record, IMO my DP1 does not create a green cast under any shooting conditions. No problems with IQ whatsoever. It's so good it's spoiled me for other cameras :)
--
JohnK
Take a picture, it'll last longer.
 
You must log in or register to reply here.

Keyboard shortcuts

f
Forum
m
My threads
Mobile site
About
Editorial content
Cameras & Lenses
Community
All content, design, and layout are Copyright © 1998–2025 Digital Photography Review All Rights Reserved.
Reproduction in whole or part in any form or medium without specific written permission is prohibited.
When you use DPReview links to buy products, the site may earn a commission.
©GPS Media - Guides, Products, Services.
Back
Top