K-X high ISO pictures

Here's a link for high ISO images from the K-X. Thanks(!) to member MCR (in the other Pentax forum) for finding the link.

http://www.flickr.com/photos/mawari/sets/72157622348752173/

Hmmm. I like what I see...

Alizee.

http://www.flickr.com/photos/mawari/3962231547/sizes/m/in/set-72157622348752173/

1/5s! SR really rules

--Reinhard

Looks VERY encouraging from a noise-at-high-ISO standpoint. Am I mistaken or are there very few truly sharp pictures among them? Granted I've been viewing them at the largest magnifications. The rumors may be true that this sensor outshines the K-7's.
MLMD

mlmd said:

Looks VERY encouraging from a noise-at-high-ISO standpoint. Am I mistaken or are there very few truly sharp pictures among them? Granted I've been viewing them at the largest magnifications. The rumors may be true that this sensor outshines the K-7's.
MLMD

Click to expand...

I think they're taken with the kit lens, wide open. Better optics will yield better results.

--
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the flowers all look OOF. It's hard to judge fromthem
--
Pennyanne

mlmd said:

Looks VERY encouraging from a noise-at-high-ISO standpoint. Am I mistaken or are there very few truly sharp pictures among them? Granted I've been viewing them at the largest magnifications. The rumors may be true that this sensor outshines the K-7's.
MLMD

Click to expand...

Be careful how you phrase this. There is more than one aspect to sensor performance (it isn't only about high ISO noise). I generally use auto ISO, but when I set the ISO to anything forcefully, it is almost always because I want ISO 100. The K-x does not have a true ISO 100. I imagine the results at ISO 100 (to the K-x with a ND filter or overexposed by a stop) will be preferable with the K-7 as twice as much light is hitting the sensor in the K-7 over the ND filter option or the K-x will start clipping highlights if you overexpose at ISO 100.

I also imagine the K-7 will retain more detail at high ISOs over blotchy noise reduction. That being said, I think the K-x will be a stellar performer for the money. You buy the K-7 because of the loads of other features that it has. Image quality from any APS-C sensor over the last few years is really very close for how most people use the camera. Even my 9 year old 3 MP Fuji S1 Pro would make excellent web images, and I sold 8x12's from it too, although that was stretching it a bit at 3 MP.

Eric

--
I never saw an ugly thing in my life: for let the form of an object
be what it may - light, shade, and perspective will always make it
beautiful. - John Constable (quote)

See my Blog at: http://viking79.blogspot.com/ (9/9/09)
Flickr Photostream: http://www.flickr.com/photos/28177041@N03/ (updated daily)
See my PPG Shots: http://www.pentaxphotogallery.com/erictastad (8/31/09)

That's looking really nice.
--
Irek J.

alizee said:

Here's a link for high ISO images from the K-X. Thanks(!) to member MCR (in the other Pentax forum) for finding the link.

http://www.flickr.com/photos/mawari/sets/72157622348752173/

Hmmm. I like what I see...

Click to expand...

Thanks for the link, as these are the first images from a production K-x I've seen. It's hard to tell how good or not the high ISO (1600) noise is in that these are just JPEG's straight from the camera with default settings, including high ISO Noise Reduction, so whatever that might mean for this camera.

What is interesting is looking at the MakerNotes with http://www.photome.de , one sees the black offset at tag 0200 hex is no longer zero as it has been for all preceeding Pentax cameras and is now at about 128 levels out of a presumed 12 bit range of 4096 levels. This indicates that Pentax no longer do black offset compensation to the raw files. Considering it is "on-the-fly" while doing data acquisition black offset compensation or lack in the algorithm doing it that produced Vertical Pattern Noise (VPN) and green to magenta horizontal shading for high ISO or pushed K10D images, the border tingeing and wide vertical pattern noise as well as other horizontal and vertical pattern noise for high ISO and "push processed" K20D images, and likely caused the thin green vertical line to show up for the K-7, perhaps Pentax has learned its lesson and pushes this processing back to later in the raw processing workflow.

This opens up all kinds of possibilities in raw processing using algorithms that produce noise pattern less images even when greatly pushed. However, it is going to throw a few wrenches into the works for some raw conversion utilities (dcraw based ones?) that don't look at this tag in the PEF data and process based on it being zero.

I can hardly wait to get my hands on some raw images from this camera!

Regards, GordonBGood

indeed. Can't wait for it either ;-)

on paper (for me) it's the best Pentax digital body!! Perfect body and 3-lens kit (15,35,70)

--
.Sam.
K20D - ist* DS - ZX-5 - LX
Photos: http://www.flickr.com/shadzee/

Looks like someone else was at the same event and took some ISO1600 pictures with a k-x. Pictures found here:

http://www.flickr.com/photos/29738823@N02/sets/72157622473793630/

Some shorter shutter times here with less motion blur.

Hmm... These are terrible.

I now regret returning my K-2000/km.

petiteface said:

Hmm... These are terrible.

I now regret returning my K-2000/km.

Click to expand...

Surely, you are joking? This last set shot "off the cuff" at an event and greatly downsized for posting on flikr?

Regards, GordonBGood