Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-24-2010, 10:00 AM   #1
New Member
Blue Jay's Avatar

Join Date: Apr 2010
Location: Tehachapi California
Posts: 22
Black Spot Problem - NEW K-X

My newly delivered K-X out of the box has a "black spot" in the display and recorded in the images. I am convinced it is a Quality Control issue.

New toy, clean freak, washed hands, surgical prep on the kitchen table when I opened the box.

Sun came out on this Saturday morning.
Stepped outside and took first pictures blue sky.

I have a conspicuous tiny black spot on the camera monitor display image.
I have the same tiny black spot on recorded images in exactly the same location.
It is in every image from the very start. Took clean uniform background to reveal it.

"Spot" does not display in viewfinder.
Swapped lenses.
Same black dot, same location.

Being an optimist, I did the page 285 cleaning the CMOS sensor procedure.
(Not that I believed for a minute there was a chance of having introduced something into a new camera since I'd been playing "cleanroom" in the first place.)

No result, or you'd not be reading this now.

Same black spot.

"Plan A" is to box it up and return it.

Figure it was worth sharing in case there was something I've missed.

Thanks in advance.

04-24-2010, 10:07 AM   #2
Senior Member




Join Date: Dec 2009
Location: MA
Posts: 133
Post an image with the spot in it.
04-24-2010, 10:16 AM   #3
New Member
Blue Jay's Avatar

Join Date: Apr 2010
Location: Tehachapi California
Posts: 22
Original Poster
Will do.
Meanwhile, you can easily duplcate what I'm seeing by putting a black ballpoint pen dot high center on a 3 x 5 index card.
04-24-2010, 10:17 AM   #4
Veteran Member




Join Date: Dec 2009
Location: Ontario
Posts: 550
Are you sure it's just not some sensor dust. A very pesky one at that? I've had an experience with one pesky one that would not come off even running the dust removal from the camera 8 or 9 times.

But to be sure you should post a picture or two and get some more opinions. If the spot doesn't appear on the viewfinder it's probably not a lens issue as these are not P&S cameras what you see in the viewfinder is actually what goes through the lens.

04-24-2010, 11:29 AM   #5
New Member
Blue Jay's Avatar

Join Date: Apr 2010
Location: Tehachapi California
Posts: 22
Original Poster
The spot is not moving at all in response to the CMOS sensor shake cycles.

The "Dust Alert" detection cycle on p 286 does not reveal anything.

Since it is doing this new, out of the box, I'm dis-inclined to tinker & fidget with it.

I am convinced it is some kind of pre-existing issue.
04-24-2010, 11:48 AM   #6
Veteran Member




Join Date: May 2007
Location: Central NJ
Posts: 469
QuoteOriginally posted by Blue Jay Quote
The spot is not moving at all in response to the CMOS sensor shake cycles.

The "Dust Alert" detection cycle on p 286 does not reveal anything.

Since it is doing this new, out of the box, I'm dis-inclined to tinker & fidget with it.

I am convinced it is some kind of pre-existing issue.
Just post a pic, then you'll know. Either that, or don't ask people for their opinion.
04-24-2010, 12:00 PM   #7
Pentaxian
bobmaxja's Avatar

Join Date: Mar 2010
Location: Laval, Quebec Canada
Posts: 1,736
I believe , one of the function is call Pixel reset. I am sure somebody who have that camera can give you the exact function.
It's seem what you have is dead or non activated pixel
04-24-2010, 12:02 PM   #8
Veteran Member




Join Date: Apr 2008
Location: Minnesota
Photos: Gallery
Posts: 1,530
Another thing you can try is take a picture of a white paper that is well lit. Set the lens to the largest aperture and take a picture. Then set it to f/8 and take a picture and then set it to f/16 and take a picture then repeat at f/32. Your dust spots should become more defined at smaller appertures.

04-24-2010, 12:05 PM   #9
Banned




Join Date: Oct 2007
Location: Savannah, U.S./Baguio City, P.H.
Posts: 5,979
QuoteOriginally posted by bobmaxja Quote
I believe , one of the function is call Pixel reset. I am sure somebody who have that camera can give you the exact function.
It's seem what you have is dead or non activated pixel
this a is a possibility worth considering. but I would do as MrApollinax has suggested and post the results.
04-24-2010, 12:23 PM   #10
Veteran Member




Join Date: Dec 2009
Location: Ontario
Posts: 550
The sensor shake option on the camera will not cause the dust particle to move to a different location. Even if you run it a couple of times.

Again I'd post picture before returning it. The odds that you got a defective camera the first time are the same odds that the one you exchange it for will be defective. I'd first make 100% sure that you did get a defective one the first time. Otherwise you could be trading a good one with dust for an actual bad one.
04-24-2010, 01:36 PM   #11
New Member
Blue Jay's Avatar

Join Date: Apr 2010
Location: Tehachapi California
Posts: 22
Original Poster
Second try to share images has failed.
Sorry.

Bottom Line-
"Dust" scan comes up clean.
(A new camera should not have a dirt problem in the first place.)

Pixel repair function cycle has been used, produces no visible change.

At f40 the "spot" is denser, with more defnition that at f7.

A large part of communicating this experience has been to poll users to establish how common this is. (Apparently it is not common.)

Secondarily- to provide one data point in case there are others who experience this.

I have general confidence in Pentax's quality control, so I do not expect a 50/50 chance of a repeat experience.

Cameras should not produce images of black dots that are not there in front of the lens.

This one, for what ever reason, does, and it does it very consistently.
04-24-2010, 01:45 PM   #12
New Member
Blue Jay's Avatar

Join Date: Apr 2010
Location: Tehachapi California
Posts: 22
Original Poster
One more time.
One image f40.
Spot in high center.
Attached Images
 
04-24-2010, 01:50 PM   #13
Pentaxian
Wheatfield's Avatar

Join Date: Apr 2008
Location: The wheatfields of Canada
Posts: 10,157
You have dust on your sensor.
It's a pity the camera was shipped with it, but all that this means is that you have succumbed to the inevitable a little sooner than most.
04-24-2010, 02:44 PM   #14
Forum Member




Join Date: Dec 2009
Location: Taiwan
Posts: 85
I see four spots and some really smaller once.
If you are within the seven days depending on your country's law. I'd return it for a new one. Since you got yours delivered fro somewhere I guess it involves shipping and waiting. Try simple mirror cleaning with a blower.

Don't use a compressed air from a can! It's to strong and can damage your camera.

If it worked enjoy your new camera if not do the shipping.
04-24-2010, 02:54 PM   #15
Senior Member




Join Date: Dec 2009
Location: MA
Posts: 133
If it was a pixel issue it would be more uniform. That definitely looks like dust or debris on the sensor.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
box, camera, display, dslr, image, images, k-x, location, photography, spot
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Nature My Spot...Get out! Gaelen Post Your Photos! 6 03-08-2010 06:38 PM
Black little spot in viewfinder alphalt Troubleshooting and Beginner Help 20 01-20-2010 08:52 AM
Abstract Can you spot it? maximm Post Your Photos! 3 01-14-2010 12:47 PM
Hello, new to the spot dhowler13 Welcomes and Introductions 4 11-20-2008 05:17 AM



All times are GMT -7. The time now is 07:58 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top