Veteran Member Join Date: May 2008 Location: Rhode Island |
Greetings to all:
In just my second thread here I hope to pick the brains of any of you who are able and willing to provide me with some direction. About a month ago I purchased the K20d and have been working diligently with it since then. Being my first DSLR, the learning curve is more pronounced than it must be for many.
I am here now because, while wandering the web for 2 months seeking wisdom on DSLRs, I often happened upon this neat little place. And my previous visits here have been fruitful which, for better or worse, slowly but surely, helped to sway me to the so-called "Pentaxian" view of the photographic universe. However, I must admit, I was not hoping to be here this early into my ownership of the K20d with an SOS.
But I am here. I recently went out to try shooting running water in a practice attempt to seize the neat effects of slow shutter speed upon moving water. Towards this end, I picked up a 49mm ND8x Hoya filter for the M 1.7 and went over to a local run-off to try things out. Now a run-off into a river is hardly picturesque, but it’s the closest thing to a waterfall I have in the immediate vicinity. Not only was I learning the new K20, but I was also performing the Zen balancing act called metering an M lens by all you indoctrinated Pentaxians, while also trying out the vagaries of the ND8x. Need I mention the art of manual focusing this so-called high performing M lens? I took some shots and went home to see what I could see. When I got home and plugged the SD card into the PC, I had surprises. They were not pleasant ones either. No, the fact that many of the shots were terribly over-exposed did not bother me; I know this metering an M lens thing will take much hoop jumping to perfect. What bothered me was on some of the images there was a little c-shaped oddity just down and left of center. I also noticed this only seemed to appear on long exposures--3 to 8 secs. And I noticed it only appeared on this day's images because the oddity happens to line up in a light and evenly colored water background which the river provided.
It took me a couple of days to investigate it, but today I did seek understanding. Of course I tried to duplicate the oddity, but indoors this time and without the Hoya ND8--the oddity is still there, in the same spot. Simple enough, I changed from the M 1.7 to the 85mm 1.8., shot long exposures in very low light, and learned the oddity was, again, still there staring at me. Although I should mention, it does not seem as defined on the 85mm, but it is definitely there. So using simple logic, I deduced, Da (pun-intended), inside the camera there must be something foreign--but why and how--the camera still has new-camera smell if you know what I mean. With the care of a surgeon, I removed the lens, peered inside and blew with all my might. Oh, should have mentioned, I did the silly little shake the sensor clean dance (aka High tech Dust Reduction) before all this with no success too.
The mirror looked clean, before and after my cleansing efforts--but more shooting revealed the problem was not solved. So I concluded there must be a substance on the mirror, or on something. Not being a plastic surgeon, and fearing a possible mishap while trying to swab the mirror, I, nonetheless, grabbed my baby's-bottomed soft lens camera cloth and ever so gently swabbed the mirror. Again, I had no success. It looks like the problem is elsewhere, or else the mirror has an invisible stain which generates this oddity only at certain long exposures.
Now, of course in % 98 of my shooting the oddity poses no problem because it will simply be absorbed into the background without notice; in fact its presence had evaded me for over three weeks. However, I took the leap into DSLR land, along with $2000, and have problems already that my little bitty Canon S3 never saw even though it hiked through the mountains of the eastern US with me for years, sometimes in temps below zero (Jan @ 5000ft in Maine and NH). Not that, obviously, I expect the K20 to take a beating in a backpack like the S3 did, never uttering a single objection to anything I threw at it. But I sure as heck did not expect this problem from a camera in this class, which has been handled with the care of a new born--the first-born for that matter!!!
Does anyone have any help?
Best Regards,
Ernest
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