Originally posted by benjikan 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
Camera Performance Anxiety!
Yes its possible to create visible VPN at high ISO without underexposing or pushing a shot. Some folks are accutely sensitive to it even at ISO400 but most people have to have it pointed out they them with little arrows, which gives you some idea how bad it really is most of the time. Some people see it in every shot because they are convinced its there somewhere in the shadows.
Compared to the high ISO performance of the A100 which is there in EVERY shot, or the amp noise on the D80 which is a real bummer in low light night scenes, I would probably make the best of it and get on with my life. I never had a perfect camera yet, so this is just something to bear in mind and work around. I shoot at ISO1000 or 1250 more than 1600 specifically to avoid it and rarely see it to any major degree. I have shot a lot of high ISO shots, and one or two were spoiled by it. A lot more were spoiled for other reasons. Some I could recover in PP to a large extent.
One or two Pentax service personnel have denied being able to see it. That does not constitute an official Pentax statement. How much business Pentax lost because of this issue I dont know. Probably quite a bit. The lather generated around it seems to me disproportionate to the degree of the issue, which was much worse on my DS. Like I said, the perfect camera does not exist so why this has generated such furore I dont know. Over-egged expectations? There are a small number of folk who seem to decide its worth producing a new thread on the issue every week and then flogging it to death on the understanding that such behaviour will force Pentax into providing a solution and in the meantime they seem to be terribly anxious about being in possession of a defective camera which is undoubtedly spoiling their fun (and a lot of other peoples who would never have noticed the problem otherwise).
This is not only deathly boring but probably counter productive. They fixed a more serious long exposure issue, so I think they would have addressed this if they could. However, if the issue proves tricky to fix - which it may well be - the noise created on the forum will NOT influence Pentax to divert resources from new models etc. plus it would be virtual corporate suicide to issue a statement admitting such a problem if there was nothing they could reasonably do about it. What would it achieve except to generate even more negative publicity?
For now, I'm just regarding it as a general characteristic of the camera thats less that optimal, as is the JPEG softness and other minor issues. Pentax do not have infinite resources and this was an entirely new model, and hey, guess what, a few bugs appeared. The *istD and DS also had some known issues which were never fixed but gradual refinement led to the K100D, which has very few. MS Windows has been out for nearly 15 years and it still has bugs! The K10D replacement will undoubtedly extract better performance from the NuCore processor once Pentax's engineers get a bit more practice.
Sure, I hope they fix it too, but another 100 threads on this issue will not make it happen any faster and in the meantime I'm getting some very nice results at ISO1000 that are better than anything I could get out of my DS.