Ugly Hedgehog® - Photography Forum
Sensor Anomalies
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Mar 21, 2019 17:14:11   #
StanMac Loc: Tennessee
 
For you digitally experienced UHHers, please take a look at the image included. The red arrows indicate some blotches that show up when light, even tones are in that area of the frame. I have enhanced the midtones so these blotches will show up better.

Are these anomalies typical of sensor contamination and if so what would they be caused by? The size and almost circular shape makes them look more like a deposit of something that is left by an evaporated liquid rather than being dust/dirt. Are the blotches indicators of a need for a sensor cleaning? Or do they indicate another condition, repairable or not. I've had the camera almost three years, and maybe it's due for a cleaning?

Also, zoom to the point at the end of the green arrow - is that a dead pixel or group of pixels? Or would a dead pixel be black?

Your advice is appreciated.

Stan
K5 Sensor Anomalies
K5 Sensor Anomalies...
(Download)

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Mar 21, 2019 17:18:50   #
jdedmonds
 
StanMac wrote:
For you digitally experienced UHHers, please take a look at the image included. The red arrows indicate some blotches that show up when light, even tones are in that area of the frame. I have enhanced the midtones so these blotches will show up better.

Are these anomalies typical of sensor contamination and if so what would they be caused by? The size and almost circular shape makes them look more like a deposit of something that is left by an evaporated liquid rather than being dust/dirt. Are the blotches indicators of a need for a sensor cleaning? Or do they indicate another condition, repairable or not. I've had the camera almost three years, and maybe it's due for a cleaning?

Also, zoom to the point at the end of the green arrow - is that a dead pixel or group of pixels? Or would a dead pixel be black?

Your advice is appreciated.

Stan
For you digitally experienced UHHers, please take ... (show quote)


Sensor needs cleaning.

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Mar 21, 2019 17:19:50   #
PixelStan77 Loc: Vermont/Chicago
 
StanMac wrote:
For you digitally experienced UHHers, please take a look at the image included. The red arrows indicate some blotches that show up when light, even tones are in that area of the frame. I have enhanced the midtones so these blotches will show up better.

Are these anomalies typical of sensor contamination and if so what would they be caused by? The size and almost circular shape makes them look more like a deposit of something that is left by an evaporated liquid rather than being dust/dirt. Are the blotches indicators of a need for a sensor cleaning? Or do they indicate another condition, repairable or not. I've had the camera almost three years, and maybe it's due for a cleaning?

Also, zoom to the point at the end of the green arrow - is that a dead pixel or group of pixels? Or would a dead pixel be black?

Your advice is appreciated.

Stan
For you digitally experienced UHHers, please take ... (show quote)

Stan, I would have the sensor professionally cleaned. Stan

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Mar 21, 2019 17:24:17   #
fotkaman Loc: Earth
 
StanMac wrote:
For you digitally experienced UHHers, please take a look at the image included. The red arrows indicate some blotches that show up when light, even tones are in that area of the frame. I have enhanced the midtones so these blotches will show up better.

Are these anomalies typical of sensor contamination and if so what would they be caused by? The size and almost circular shape makes them look more like a deposit of something that is left by an evaporated liquid rather than being dust/dirt. Are the blotches indicators of a need for a sensor cleaning? Or do they indicate another condition, repairable or not. I've had the camera almost three years, and maybe it's due for a cleaning?

Also, zoom to the point at the end of the green arrow - is that a dead pixel or group of pixels? Or would a dead pixel be black?

Your advice is appreciated.

Stan
For you digitally experienced UHHers, please take ... (show quote)


Those are remnants of dried droplets on either your sensor or the mirror. Those occur when you change lenses, so try to keep your camera pointed down next time you do the changing.
Remedy is either having the camera cleaned (about $100) or remove the blotches in post-processing.

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Mar 21, 2019 17:32:42   #
Architect1776 Loc: Williamsport Pa
 
jdedmonds wrote:
Sensor needs cleaning.


Yes, very dirty sensor.
Not hard to clean, buy a kit and clean, don't be afraid to press relatively hard to get the crud off.
First try for me I didn't clean hard enough then dry hard enough and left more crap on the sensor than when I started. Second try I was not so afraid to really clean and dry the sensor and it came out perfect.

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Mar 21, 2019 17:33:31   #
Goober Loc: SE Pennsylvania
 
Spots on the mirror would have nothing to do with spots on the image. They would only be seen in the optical viewfinder.

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Mar 21, 2019 17:34:23   #
Goober Loc: SE Pennsylvania
 
Spots on the mirror would have nothing to do with spots on the image. They would only be seen in the optical viewfinder. Yes, clean the sensor.

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Mar 21, 2019 20:15:19   #
StanMac Loc: Tennessee
 
Thanks all for your advice. Off it goes for cleaning.

Stan

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Mar 22, 2019 06:25:46   #
billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
 
StanMac wrote:
For you digitally experienced UHHers, please take a look at the image included. The red arrows indicate some blotches that show up when light, even tones are in that area of the frame. I have enhanced the midtones so these blotches will show up better.

Are these anomalies typical of sensor contamination and if so what would they be caused by? The size and almost circular shape makes them look more like a deposit of something that is left by an evaporated liquid rather than being dust/dirt. Are the blotches indicators of a need for a sensor cleaning? Or do they indicate another condition, repairable or not. I've had the camera almost three years, and maybe it's due for a cleaning?

Also, zoom to the point at the end of the green arrow - is that a dead pixel or group of pixels? Or would a dead pixel be black?

Your advice is appreciated.

Stan
For you digitally experienced UHHers, please take ... (show quote)


Your sensor is dirty. Please have it professionally cleaned.

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Mar 22, 2019 07:22:29   #
camerapapi Loc: Miami, Fl.
 
No anomalies, it is simply dust on the sensor and it needs a good clean up. By the way, numerous cameras now have what manufacturers call "ultrasonic cleaning." I use Nikon and Olympus cameras and while the sensor cleaning mechanism built into Nikon bodies is a joke Olympus sports what to me could be one of the best sensor cleaning mechanism available. In my several years using Olympus I never had to clean the sensor of any of my Olympus bodies.
Have your camera cleaned by a reputable technician but the bad news is that it will happen again in the near future. So is the nature of digital sensors.

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Mar 22, 2019 07:49:00   #
pdsdville Loc: Midlothian, Tx
 
The camera store I go to taught me how to clean the sensor and, I got the cleaning kit for about $80. It's really easy once you get over the fear of screwing up the sensor. You really don't clean the sensor but a protective cover that fits over it. Once you know how you can get the kit for around $30 if I remember correctly.

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Mar 22, 2019 08:18:25   #
awis01
 
I vote with the majority, Sensor cleaning.

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Mar 22, 2019 08:25:16   #
Longshadow Loc: Audubon, PA
 
You have dirt on the sensor.
(Gray splotches)

Dead pixels are black;
stuck pixels can be a color, including white.

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Mar 22, 2019 10:35:18   #
catchlight..
 
Looks like the typical oil from the shutter.... easy to clean if you purchase a sensor cleaning kit.

It is simple to clean the mirror and then, with mirror up, t the sensor is next. Look on Amazon for the kit.

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Mar 22, 2019 10:42:06   #
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