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03-01-2010, 12:03 PM   #31
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ok, thanks for the 100% crop.
interesting to see how sharpening an noise processing looks on the 7D. The Pentax K-7 has a different kind of noise and sharpening. But since I only use RAW and do my own PP the results I have are more 'natural' to me. Somehow the above image makes me believe that the cat's fur consists of pixel-width hairs. The nostrils and nose come out quite pleasing though.
This image shows me that most today's DSLRs can take fine ISO 1600 pictures. And it shows that my K-7 can still hang out with the rest :-)

03-01-2010, 12:55 PM   #32
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Well, here's my comparison between version 1.02 and 1.03 of the K-7's firmware. I used manual mode, same shutterspeed and f/stop and even manual WB. Converted from RAW in ACR with noise reduction 0 and sharpness 0.

Version 1.02:


Version 1.03:

Last edited by Asahiflex; 03-01-2010 at 01:03 PM.
03-01-2010, 12:57 PM   #33
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Looks the same to me.

Jason
03-01-2010, 01:03 PM   #34
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QuoteOriginally posted by Jasvox Quote
Looks the same to me.
Indeed, but I forgot to add that I shot them in RAW, the pictures were converted in ACR with sharpness 0 and noise reduction 0.

03-01-2010, 01:32 PM   #35
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QuoteOriginally posted by Asahiflex Quote
Well, here's my comparison between version 1.02 and 1.03 of the K-7's firmware. I used manual mode, same shutterspeed and f/stop and even manual WB. Converted from RAW in ACR with noise reduction 0 and sharpness 0.

Version 1.02:


Version 1.03:
First pic looks like it has more red in it.
03-01-2010, 03:05 PM   #36
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My high ISO photos (firmware 1.03)
Photo 1:

Camera: Pentax K-7
Exposure: 0.05 sec (1/20)
Aperture: f/1.4
Focal Length: 55 mm
ISO Speed: 3200
Exposure Bias: +0.3 EV


Photo 2 (dark room, f/1.4, ISO2500 and 1/6 sec...) :

Camera: Pentax K-7
Exposure: 0.167 sec (1/6)
Aperture: f/1.4
Focal Length: 55 mm
ISO Speed: 2500
Exposure Bias: +0.3 EV

Photo3:

Camera: Pentax K-7
Exposure: 0.008 sec (1/125)
Aperture: f/1.4
Focal Length: 55 mm
ISO Speed: 2500
Exposure Bias: +0.3 EV

Photo 4:

Camera: Pentax K-7
Exposure: 0.077 sec (1/13)
Aperture: f/1.4
Focal Length: 55 mm
ISO Speed: 3200
Exposure Bias: +0.3 EV

Photo5:

Camera: Pentax K-7
Exposure: 0.05 sec (1/20)
Aperture: f/1.4
Focal Length: 55 mm
ISO Speed: 3200
Exposure Bias: +0.3 EV
03-01-2010, 03:30 PM   #37
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QuoteOriginally posted by Asahiflex Quote
Well, here's my comparison between version 1.02 and 1.03 of the K-7's firmware. I used manual mode, same shutterspeed and f/stop and even manual WB. Converted from RAW in ACR with noise reduction 0 and sharpness 0.
Well, my eyes hurt now and I think, maybe, that the upper image has is a bit smoother with a bit less chroma noise in one or two places when I look carefully enough.

Even if true, there's nothing there that would be evident in normal use. Perhaps on TV, where the lab geek "enhances" the CCTV image of the parking lot at night to discover that he identify the maker of the laces on the perp's trainers.

I love the part after that when the forensic tech holsters his Glock and dashes off in his SUV with emergency equipment operating to screw up an interview with the main suspect while the homicide detective who's really in charge of the case is trying to conceal police interest until the proper surveillance is set up.

OK - back on track. Little to see here. Move along now, shall we?

PS: Thanks for those photos. Looks like real evidence as opposed to theorizing.
03-01-2010, 04:10 PM   #38
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QuoteOriginally posted by jan rinze Quote
ok, thanks for the 100% crop.
I'd say it's a ~45% crop… unless my calculations are way of.

Edit: Sorry for the derail.

03-01-2010, 05:57 PM   #39
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I personally still think there has been some minor hardware changes between the earlier models and later ones.

The difference in my unit between the old pcb and new lead me to think that the sensor wasn't the issue. Do the SLR's use A/D converters for the sensor to the processor?
03-01-2010, 11:07 PM   #40
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Pretty much sure the noise is the same and the sensor are the same, you guys are just being a little psyched out.
03-02-2010, 12:06 AM   #41
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Well I can assure you my unit is performing very differently after the main board replacement.
03-02-2010, 12:23 AM   #42
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QuoteOriginally posted by LeDave Quote
Pretty much sure the noise is the same and the sensor are the same, you guys are just being a little psyched out.
I agree. With a major change like this, Pentax would have mentioned something about it. It does them more good then bad. Why would they hide it. Everyone is over reacting because you want to believe the new firmware improves noise.
03-02-2010, 12:37 AM   #43
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I would have thought Pentax would have screamed an improvement like this from the rooftops...?
03-02-2010, 12:39 AM   #44
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QuoteOriginally posted by Nass Quote
I would have thought Pentax would have screamed an improvement like this from the rooftops...?
Most definitely.
03-02-2010, 03:17 AM   #45
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QuoteOriginally posted by Alex00 Quote
I agree. With a major change like this, Pentax would have mentioned something about it. It does them more good then bad. Why would they hide it. Everyone is over reacting because you want to believe the new firmware improves noise.

Not necessarily. With little fanfare M$ added HDMI to the 360 gradually phasing out the Non-HDMI models, granted it wasn't kept quiet but it was done quite subtle.

Also Pentax has made minor firmware changes in between 1.01 -> 1.02 -> 1.03 without making it official.

Manufacturers do at times add minor improvements to products during production lifecycle,who's to say that components used during the early production didn't have any sort of imperfections that were eventually sorted? Many nVidia 8600GT chips for notebooks had an issue with a thinner die which caused some to have overheating and performance issues.

Mind you all the above is speculative, but plausible. Why would Pentax admit that there was an issue with earlier models? its bad PR, release a few early models, fix the problem and correct with later.
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