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09-08-2010, 03:56 AM   #46
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What a nonsense.......max. iso 800.........
maybe your cameras should go to service???

https://www.pentaxforums.com/forums/967126-post402.html

https://www.pentaxforums.com/forums/967128-post403.html

https://www.pentaxforums.com/forums/967132-post404.html

all bloody jpeg........needs only good configurations and a good hand for high iso.....
the noise here is much higher than in original pix.
i use max. asa 2000.
3200 is not to use for me.
maybe the k-5 is better

best regards,andy

09-08-2010, 05:27 AM   #47
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QuoteOriginally posted by Pentaxor Quote
the point is, you will get worse images with any of these cameras if the exposure isn't right.
True but you often need to raise the ISO to get the exposure right. And after 1600 it doesn't matter because anyway the camera is just using digital gain (same as using the exposure slider in Lightroom).

For me the limit for the K-7 is around 1600. There is noise even at base ISO on all DSLR, and each people has its own tolerance when it comes to noise. Some people won't go above 800, some are happy with 3200, etc. The amount of noise also vary with the scene. For example a daylight 1600 ISO will look much better than under tungsten (this is normal, tungsten is dominated by orange light, and on a Bayer sensor red and blue pixels get half the light of the green pixels).
09-08-2010, 05:47 AM   #48
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where will the info be released at 1pm japan time tomorrow?
09-08-2010, 05:50 AM   #49
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QuoteOriginally posted by ManuH Quote
it doesn't matter because anyway the camera is just using digital gain (same as using the exposure slider in Lightroom).
What I'd like to know, is how this actually affects the image? I mean... does the SNR curve change once the camera moves to digital gain amplification?

I only ask because its quite common for people to make mention of this factor but I never actually understood how it impacts the image in contrast to signal amplification...

09-08-2010, 10:44 AM   #50
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QuoteOriginally posted by ManuH Quote
True but you often need to raise the ISO to get the exposure right. And after 1600 it doesn't matter because anyway the camera is just using digital gain (same as using the exposure slider in Lightroom).

For me the limit for the K-7 is around 1600. There is noise even at base ISO on all DSLR, and each people has its own tolerance when it comes to noise. Some people won't go above 800, some are happy with 3200, etc. The amount of noise also vary with the scene. For example a daylight 1600 ISO will look much better than under tungsten (this is normal, tungsten is dominated by orange light, and on a Bayer sensor red and blue pixels get half the light of the green pixels).
I may understand what you meant when you said that the limit for you with the K-7 is around ISO 1600. the images at ISO 1600 are very clean compared to ISO 3200. if I were to say it in simpler terms, they are still of very good quality. having compared images shot at both sensitivities, the difference in noise is evident. although I can attest that the ISO 3200 images are still good and usable, but not as nice as the ISO 1600 images. these of course were done in the absence of NR.

it is true that shooting at certain conditions can also impact the amount and quality of noise in an image. tungsten is quite the task. but it doesn't mean you won't be able to produce good or usable images at ISO 3200. it can be difficult, but not unattainable.


now if someone mentioned the K-7's ISO 6400, that would be another story.
09-08-2010, 11:20 AM   #51
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QuoteOriginally posted by Pentaxor Quote
it is true that shooting at certain conditions can also impact the amount and quality of noise in an image. tungsten is quite the task. but it doesn't mean you won't be able to produce good or usable images at ISO 3200. it can be difficult, but not unattainable.
Topaz is the first NR plug-ins that I trust to really clean a noisy shot. With this software it's possible to go beyond what's usually possible as long as the shot is noisy but has good details. With care a 3200 shot from the K-7 is easily cleanable. Even 6400 is not that bad, detail rendition from the K-7 is great even at these high sensitivities.

Print size is also a factor in deeming a high ISO shot good enough.
09-08-2010, 01:07 PM   #52
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K-7 and ISO 3200 what do you think?

09-08-2010, 01:18 PM   #53
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QuoteOriginally posted by Danny Delcambre Quote
K-7 and ISO 3200 what do you think?
WOW! JUST WOW!
So clean...

09-08-2010, 02:56 PM   #54
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QuoteOriginally posted by happygui Quote
Are you serious? I think the K7's 800 ISO usable. 1600 is kind of bad. Not sure how can you accept K7's 3200 performance. It is worse than k20d's high ISO performance.
Different uses though, I'm not doing portraits or landscapes etc. I'm doing sport. So saying ISO3200 is useless is very incorrect, I use it. I've asked them to install more lights at the Park, but for some reason they don't listen to me.

QuoteOriginally posted by dosdan Quote
He cheated! Notice how he focused on the stationary cup rather than the crawling baby. AF-C not up to this speed of subject movement?

Dan
That's Pentax's predictive AF working right there, it knew where the kid was going to end up!
09-08-2010, 04:01 PM   #55
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One post is problem so I repost it.

K-7 and IS0 3200

https://www.pentaxforums.com/forums/attachments/16-pentax-news-rumors/70250d1283986797-help-bottom-line-k-5-please-iso3200-k-7-1.jpg
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09-08-2010, 05:23 PM   #56
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QuoteOriginally posted by Pentaxor Quote
Yep, that's Peter Cetera. actually its more like a sequence of shots. I think I got one where he's playing the guitar as well. and yeah, he still sounds good after all these years.

why does he always sing with his mouth half open?? He looks like he is singing through his teeth. This is not a criticism, btw.
09-08-2010, 07:54 PM   #58
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QuoteOriginally posted by Danny Delcambre Quote
June 2010 K-7 and ISO 2500

June 2010 K-7 and ISP 3200
I hope you knew I was kidding back there
Those are excellent high ISO samples btw.
Great job with those.
09-08-2010, 08:42 PM   #59
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QuoteOriginally posted by Nubi Quote
why does he always sing with his mouth half open?? He looks like he is singing through his teeth. This is not a criticism, btw.
hmmmm...it never really occur to me, but yeah he always does that and I dunno why. as long as I here his voice that would be enough, even if his mouth is closed just like Stephen Hawking, except the robotic voice of course.
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