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RX1(R) Image Thread
  
 
Dpedraza
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p.95 #1 · RX1(R) Image Thread


first shot with RX1


Untitled by dpedraza15, on Flickr

Exposure 1/100
Aperture f/8.0
Focal Length 35 mm
ISO Speed 50



Sep 24, 2013 at 01:36 PM
HelenaN
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p.95 #2 · RX1(R) Image Thread


-Bob, very nice set in post p.94 #13, esp. the farmer on the truck with the pumpkins.
-sebboh, love the first one in p.94 #15 (the one with trees in fog). Well composed and the color tones are very pleasant! Second one is great too.
Regarding the posterization: I have never had a camera that does this as often as RX1. I wonder why? Can it be because it has quite a bit of vignetting? Or does the high resolution has anything to do with it?
-ebookman, the first one with the pumpkins and the old window is really nice. Great colors and textures.

Some more from our trip up to north-eastern Norway:

1.






2.






3.






4.






5.






6.








Sep 24, 2013 at 06:05 PM
Jonas B
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p.95 #3 · RX1(R) Image Thread


HelenaN wrote:
Regarding the posterization: I have never had a camera that does this as often as RX1. I wonder why? Can it be because it has quite a bit of vignetting? Or does the high resolution has anything to do with it?
(...)


Thanks again Helena for your somewhat exotic images!
Where did you pick up that part about posterization? I don't follow you there.



Sep 24, 2013 at 06:15 PM
HelenaN
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p.95 #4 · RX1(R) Image Thread


Jonas B wrote:
Thanks again Helena for your somewhat exotic images!
Where did you pick up that part about posterization? I don't follow you there.


Thank you!
Sorry about being unclear. I was talking about the issue you brought up in this post:
http://www.fredmiranda.com/forum/topic/1168684/93#11821270
When some of us discussed this issue after I posted some photos from Lofoten a few months ago I was told it's called posterization.



Sep 24, 2013 at 06:19 PM
douglasf13
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p.95 #5 · RX1(R) Image Thread


That example from sebboh seemed to be because of stitching different sky tones, which isn't really an RX1 issue.

In-camera vignetting correction in a lot of cameras can be an issue, too. I leave mine off.



Sep 24, 2013 at 06:28 PM
sebboh
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p.95 #6 · RX1(R) Image Thread


douglasf13 wrote:
That example from sebboh seemed to be because of stitching different sky tones, which isn't really an RX1 issue.

In-camera vignetting correction in a lot of cameras can be an issue, too. I leave mine off.


no, helena is right. the toned image before the stitch is the one she was referring to. it has a very odd and distinct posterization effect.

i believe vignetting is the source of the issue, not anything related to the sensor, though the ability to dramatically push and pull the sensor probably makes us more likely to do things that cause posterization (e.g. dramatic shadow lifting will often produce strange interactions with natural and added vignetting).

edit: i encounter this type of posterization fairly regularly with toned images when i add vignetting using other cameras as well.



Edited on Sep 24, 2013 at 06:41 PM · View previous versions



Sep 24, 2013 at 06:38 PM
Jonas B
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p.95 #7 · RX1(R) Image Thread


I didn't think about in-camerad corrections. As I shoot raw only I have all those turned off.


Sep 24, 2013 at 06:40 PM
sebboh
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p.95 #8 · RX1(R) Image Thread


Jonas B wrote:
I didn't think about in-camerad corrections. As I shoot raw only I have all those turned off.


i have never had in-camera vignetting correction turned on either.




Sep 24, 2013 at 06:42 PM
Jonas B
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p.95 #9 · RX1(R) Image Thread


Ok, the image with JPG compression artifacts I asked about? Or, that's what I thought it was...


Sep 24, 2013 at 06:42 PM
weezintrumpete
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p.95 #10 · RX1(R) Image Thread


Some great photos and commentary by one of my favorite bloggers: http://www.minimallyminimal.com/blog/8-months-with-the-sony-rx1


Sep 24, 2013 at 06:47 PM
 

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Tariq Gibran
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p.95 #11 · RX1(R) Image Thread


sebboh wrote:
no, helena is right. the toned image before the stitch is the one she was referring to. it has a very odd and distinct posterization effect.

i believe vignetting is the source of the issue, not anything related to the sensor, though the ability to dramatically push and pull the sensor probably makes us more likely to do things that cause posterization (e.g. dramatic shadow lifting will often produce strange interactions with natural and added vignetting).

edit: i encounter this type of posterization fairly regularly with toned images when i add vignetting using other cameras as well.



I noticed that slight posterization in the sky. Traditionally, the cause is editing in 8 bit vs 16 bit and also low quality JPEG compression and resizing. Subtle gradations (such as in a sky) will obviously show the issue worse if care is not taken to avoid the above (always edit in 16bit and only convert to 8 bit as the last step such as for web posting). This is also a good place to mention that using bicubic sharper when resizing is not the best option when an image has subtle gradations (and reducing the size in Automatic will do this as well).



Sep 24, 2013 at 06:48 PM
sebboh
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p.95 #12 · RX1(R) Image Thread


Jonas B wrote:
Ok, the image with JPG compression artifacts I asked about? Or, that's what I thought it was...


it's a jpeg artifact called posterization, but not the kind that can be fixed by lowering compression in this case as near as i can tell. it's not there if i export it as 16 bit tiff in prophoto rgb, but it shows up in any jpeg.






Sep 24, 2013 at 06:52 PM
sebboh
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p.95 #13 · RX1(R) Image Thread


Tariq Gibran wrote:
I noticed that slight posterization in the sky. Traditionally, the cause is editing in 8 bit vs 16 bit and also low quality JPEG compression and resizing. Subtle gradations (such as in a sky) will obviously show the issue worse if care is not taken to avoid the above (always edit in 16bit and only convert to 8 bit as the last step such as for web posting). This is also a good place to mention that using bicubic sharper when resizing is not the best option when an image has subtle gradations (and reducing the size in Automatic
...Show more

what do you recommend for resizing?




Sep 24, 2013 at 06:53 PM
Jonas B
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p.95 #14 · RX1(R) Image Thread


I see. Then I stand corrected.
So it is not in the raw but shows up as soon as you export it into JPG format. Also when exporting to 16-bit JPG minimum compression? I don't think I ever run into it in that large scale. I have seen it, but not in an RX1 image yet, earlier but then it has been smaller details showing some colour artifacts.

EDIT: Skip my question above, I just re-read Tariq's comment above.

Edited on Sep 24, 2013 at 06:59 PM · View previous versions



Sep 24, 2013 at 06:55 PM
sebboh
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p.95 #15 · RX1(R) Image Thread


Jonas B wrote:
I see. Then I stand corrected.
So it is not in the raw but shows up as soon as you export it into JPG format. Also when exporting to 16-bit JPG minimum compression? I don't think I ever run into it in that large scale. I have seen it, but not in an RX1 image yet, earlier but then it has been smaller details showing some colour artifacts.


i've not tried 16-bit jpegs just 8-bit with minimum compression. i don't believe 16-bit jpegs are an option with my version of LR?




Sep 24, 2013 at 06:59 PM
Jonas B
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p.95 #16 · RX1(R) Image Thread


sebboh wrote:
i've not tried 16-bit jpegs just 8-bit with minimum compression. i don't believe 16-bit jpegs are an option with my version of LR?


I'm again thinking about my own situation. I export 16-bit files to Photoshop and convert there.



Sep 24, 2013 at 06:59 PM
Tariq Gibran
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p.95 #17 · RX1(R) Image Thread


sebboh wrote:
what do you recommend for resizing?



In PS, I use good old Bicubic (best for smooth gradients). I have seen some really terrible results from Bicubic Sharper.



Sep 24, 2013 at 07:05 PM
sebboh
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p.95 #18 · RX1(R) Image Thread


Tariq Gibran wrote:
In PS, I use good old Bicubic (best for smooth gradients). I have seen some really terrible results from Bicubic Sharper.


oh, that's the same as i use...




Sep 24, 2013 at 07:12 PM
Tariq Gibran
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p.95 #19 · RX1(R) Image Thread


sebboh wrote:
oh, that's the same as i use...



Hmm, that's odd then. So you work completely from the raw in 16bit all the way through, including re-sizing using the standard Bicubic, then convert to 8bit? Maybe it does have something to do with the auto vignetting correction as Douglas mentioned if that's the case. I also leave that off.

What color space do you convert/edit in and when do you convert to SRGB? Maybe it's also causing an issue? EDIT. If you are editing in ProPhoto RGB and converting to SRGB at the very end, this should not be an issue either. hmm


Edited on Sep 24, 2013 at 07:21 PM · View previous versions



Sep 24, 2013 at 07:15 PM
Jonas B
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p.95 #20 · RX1(R) Image Thread


It would be interesting to try that image in a couple of converters. Maybe I"ll yry to get a couple of similar images and see what I can find.


Sep 24, 2013 at 07:20 PM
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