P10 and S10 at 28mm versus A12-28 - Part 1

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P10 and S10 at 28mm versus A12-28 - Part 1

Postby waloszek » Fri Nov 19, 2010 10:39 pm

Hi all,
Now the inevitable happens -- a comparison that includes my S10 module. For the comparison, I replicated two motives from yesterday. Not surprisingly, the S10 lies somewhere in the middle between the other two modules. I also has the strongest purple tint.
Best regards, Gerd

For the first motif, I employed auto contrast and for the sections also levels to lighten the sections up. The seqence is P10, S10, and A12-28:
R0023052_sm.jpg
R0023052_sm.jpg (105.19 KiB) Viewed 2150 times

EXIF-Data
Image taken on: Fri Nov 19, 2010 2:43 pm
Focus length: 4.9 mm
Shutter speed: 1/160 Sec
F-number: F/7
ISO speed rating: 100
Whitebalance: Auto
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR P10
Exposure program: Normal program
Exposure bias: -3/10 EV
Metering mode: Pattern

R0023052s_sm.jpg
R0023052s_sm.jpg (114.5 KiB) Viewed 2141 times

EXIF-Data
Image taken on: Fri Nov 19, 2010 2:43 pm
Focus length: 4.9 mm
Shutter speed: 1/160 Sec
F-number: F/7
ISO speed rating: 100
Whitebalance: Auto
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR P10
Exposure program: Normal program
Exposure bias: -3/10 EV
Metering mode: Pattern

R0023047_sm.jpg
R0023047_sm.jpg (110.35 KiB) Viewed 2154 times

EXIF-Data
Image taken on: Fri Nov 19, 2010 2:42 pm
Focus length: 6 mm
Shutter speed: 1/320 Sec
F-number: F/4.8
ISO speed rating: 100
Whitebalance: Auto
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR S10
Exposure program: Normal program
Exposure bias: -3/10 EV
Metering mode: Pattern

R0023047s_sm.jpg
R0023047s_sm.jpg (109.91 KiB) Viewed 2148 times

EXIF-Data
Image taken on: Fri Nov 19, 2010 2:42 pm
Focus length: 6 mm
Shutter speed: 1/320 Sec
F-number: F/4.8
ISO speed rating: 100
Whitebalance: Auto
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR S10
Exposure program: Normal program
Exposure bias: -3/10 EV
Metering mode: Pattern

R0023050_sm.jpg
R0023050_sm.jpg (113.62 KiB) Viewed 2145 times

EXIF-Data
Image taken on: Fri Nov 19, 2010 2:42 pm
Focus length: 18.3 mm
Shutter speed: 1/400 Sec
F-number: F/5.6
ISO speed rating: 200
Whitebalance: Auto
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Normal program
Exposure bias: -3/10 EV
Metering mode: Pattern

R0023050s_sm.jpg
R0023050s_sm.jpg (114.05 KiB) Viewed 2154 times

EXIF-Data
Image taken on: Fri Nov 19, 2010 2:42 pm
Focus length: 18.3 mm
Shutter speed: 1/400 Sec
F-number: F/5.6
ISO speed rating: 200
Whitebalance: Auto
Flash: Flash did not fire, compulsory flash mode
Camera-model: GXR A12
Exposure program: Normal program
Exposure bias: -3/10 EV
Metering mode: Pattern
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waloszek
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby odklizec » Fri Nov 19, 2010 10:47 pm

Good comparison Gerd! Thanks for it! The A12 28mm and P10 seems produce similar WB but A12 is still a bit warmer? S10 is very cold to my taste ;) BTW, in this example, the A12 appears to be best exposed? The P10 and S10 shots look slightly underexposed to my eyes?
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby waloszek » Fri Nov 19, 2010 10:58 pm

Generally, I underexpose my images, so they may look somewhat underexposed. But as I used auto contrast in PSE, this is not the original impression: in the originals, the photos look even more underexposed. The A12-28 seems to underexpose less, but yesterday, I had samples that even looked overexposed to me (despite EV -0.3).

I think WB is hard to judge from these samples. Both, the A12 and the S10, have a purple tint (the S10 even stronger), which sometimes leads to a violet sky. The P10, on the other hand, looks more blue/greenish, which results in nicer looking skies... Personally, I would have preferred if Ricoh would have made WB of their modules more consistent so that module differences are not that apparent. Maybe, I will try to set all of them to a more neutral WB.

Best regards, Gerd
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby PROSAIC™ » Sat Nov 20, 2010 12:37 am

I always preset white balance and correct per RAW if necessary. Most of the time the »daylight« balance looks fine to me and which is what you normally get when shooting film (nearly all are »daylight corrected«).

I assume what you see here may not be an effect of white balance but overall sensor tuning. I cant compare to smaller Ricoh cameras but the GRD and the A12 lean towards red / magenta by default. So the P series may be the exception to the rule.
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby waloszek » Sat Nov 20, 2010 12:48 am

>> So the P series may be the exception to the rule.
It looks like that and includes the R/CX series...
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby thelps » Sat Nov 20, 2010 12:52 am

waloszek wrote:Both, the A12 and the S10, have a purple tint (the S10 even stronger


Hi Gerd, just to clarify, when you mention the purple tint do you mean like an overall colour cast instead of the purple fringing some lenses exhibit because of CA or chromatic abberation? These all look clear of CA to me.

Thanks for sharing your results.
Tim
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby waloszek » Sat Nov 20, 2010 12:55 am

Exactly, there is an overall color cast in the S10 and A12 images, and it has been noted already severals times in the forums (at least at dpreview.com). Personally, I would prefer a slightly more neutral "color cast".
Best regards, Gerd
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby socket » Sat Nov 20, 2010 1:30 am

Thanks for all your hard work with these tests, Gerd :)
A happy GX100 and GXR owner - http://www.pbase.com/socket
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby waloszek » Sat Nov 20, 2010 11:13 am

@socket: You're welcome! But I have to admit that gradually panic comes up -- there is so much to do until Christmas...
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Re: P10 and S10 at 28mm versus A12-28 - Part 1

Postby JRS11 » Sat Nov 20, 2010 10:51 pm

Gerd, very much what I would expect, to my eye the S10 is better than the P10 and the A12 the best.
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