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Old Mar 30, 2007, 3:05 AM   #1
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There have been many people on different forums expressing their concerns regarding VPN (Vertical Pattern Noise) in the Pentax K10D. Although I haven't experienced this anomaly, those who have done so feel that Pentax have not addressed these concerns. Can a Firmware Update resolve this issue? Is it exclusive to Pentax or does it come down to understanding the limits of the digital domain. I tend to believe that if ones exposure is correct within reason, that this issue does not crop up.

Ben

http://www.pressbook.com/homebook.as...&owner_id=5144
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Old Mar 30, 2007, 4:25 AM   #2
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vpn?
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Old Mar 30, 2007, 4:51 AM   #3
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errno_gmm wrote:
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vpn?
Sorry for the acronym..."Vertical Pattern Noise"

http://www.pressbook.com/homebook.as...&owner_id=5144
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Old Mar 30, 2007, 5:36 AM   #4
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Hi Ben,

From the examples and explanations that I have seen and read These complainers are pushing the limits. They are trying to get the camera to produce these results.

They are trying to get 6400 ISO or higher. They are over/under exposing their pics. These to me seem to be the PIXEL PEEPERS or the MEASUREBATORS. Thes are the ones that are always taking test shots to find faults with their new equipment. They are never satisfied and never will be.

If most of these people would take the time to LEARN the equipment then they might not have anything to post except some nice pictures.

Rudy
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Old Mar 30, 2007, 8:16 AM   #5
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Hi Ben,

Me thinks there are 2 types of people who really have problems with vpn.

a: the lot Rudy refers to, people who are really pushing the limit of the camera

b: someone who has (without realizing or caring) taken a really underexposed shot and then opens it in camera raw, where this program raises the exposure so much that the problem occurs.
(just did that while experimenting with extension tubes and wow I had vpn)

In the end in both cases it's the person behind the camera who has done it, and not an error of the camera.

I don't think that a firmware update will help or is needed. The camera works fine within the limits it should.

Just my 0.05€

Ronny

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Old Mar 30, 2007, 10:11 AM   #6
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It is the same kind of strange effect I use to get when pushing ISO/ASA 400 slide film to 3400 when processing the film.

"The more things change, the more they stay the same!"

Tom
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Old Mar 30, 2007, 10:31 AM   #7
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Idd, a properly exposed shot will not have any banding. I shoot concerts from time to time, and have only experienced the problem with my DL when either cropping too small and then boosting the levels, or trying to salvage a way underexposed shot.
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Old Apr 1, 2007, 12:18 AM   #8
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I'm one of those who thought my K10 had some banding issues, though it did seem to depend on which monitor I looked at the pictures on. I posted some comparison shots with both the K10 and the K100, and I wasn't the only one that thought there was some sort of banding noise pattern on the K10 pictures, where the K100 (even at 3200) didn't show. It also seemed like Neat Image didn't take it all out, either.

I wasn't too concerned, since most of my pictures can be taken with ISO 800 or less, and hadn't bothered to check whether the two updates had made any difference. Tonight I decided to re-check the K10. I'm not at home, so I'm only using my laptop's monitor (and, like most laptops that are over 2 years old, the monitor isn't the greatest). However, this picture (and the other 8 I took) doesn't show any vertical banding on it - does anyone else see any? I'm going to post two versions of the same picture, the first converted in LR (no exposure compensation), with some sharpening but no noise reduction, then cropped a bit and resized (using bicubic sharper) in CS2 but no other pp.
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Old Apr 1, 2007, 12:22 AM   #9
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Same picture, run through Neat Image before cropping and resizing (resized a bit bigger), then USM applied. I did adjust the exposure a bit in LR (seemed a hair underexposed but not very much) when I converted it.

This was taken with the K10 and a SMC M 50mm 1.7 lens, f4. Still find it hard to believe I'm still using a "kit" lens bought over 25 years ago.
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