Stained pictures

Discussion about Ricoh GR Digital IV

Stained pictures

Postby vinzbaud » Sat Mar 21, 2015 12:52 pm

Hi,

My GRD4 started recently to capture a stain when used in high light environments. It looks like that :

f9 :

f9-2-1280.jpg
f9
f9-2-1280.jpg (884.82 KiB) Viewed 1158 times

EXIF-Data
Image taken on: Sat Mar 21, 2015 11:28 am
Focus length: 6 mm
Shutter speed: 1/320 Sec
F-number: F/9
ISO speed rating: 80
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GR DIGITAL 4
Exposure program: Manual
Exposure bias: 0 EV
Metering mode: Spot


f5 ( not very visible but that's due to the light conditions, it can be more visible in others )

f5-1280.jpg
f5-1280.jpg (704.35 KiB) Viewed 1178 times

EXIF-Data
Image taken on: Sat Mar 21, 2015 11:19 am
Focus length: 6 mm
Shutter speed: 1/2000 Sec
F-number: F/5
ISO speed rating: 80
Whitebalance: Manual
Flash: Flash did not fire, compulsory flash mode
Camera-model: GR DIGITAL 4
Exposure program: Manual
Exposure bias: 0 EV
Metering mode: Spot


Also the f5 one looks bigger and less define.

My lens cover has a little scratch in the front ( the bright line on the left corner of the purple reflection ) :

ricoh objo-1000.jpg
ricoh objo-1000.jpg (578.13 KiB) Viewed 1141 times

EXIF-Data
Image taken on: Sat Mar 21, 2015 11:34 am
Focus length: 3.97 mm
Shutter speed: 1/30 Sec
F-number: F/2.4
ISO speed rating: 514
Whitebalance: Auto
Flash: Flash did not fire
Camera-model: Nexus 5


But the scratch looks quite uniform so I don't get why it would only be a stain.
Also I tried to vacuum the lens without any visible effect, the stain didn't move a bit.

Do you guys have any ideas what that could be ?
vinzbaud
 
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Re: Stained pictures

Postby riccadonna » Sat Mar 21, 2015 9:42 pm

Sorry but it looks like shit on the sensor. Try to take a picture at the widest and smallest aperture. The speck should be least pronounced at f:1.9 and strongest at the smallest one.
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Re: Stained pictures

Postby vinzbaud » Sun Mar 22, 2015 12:49 pm

Thanks for the answer. What you describe is exactly what happens. So it seems I have to send it to repair or something ... any other options ?
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Re: Stained pictures

Postby Orol » Sun Mar 22, 2015 5:18 pm

Agreed, it looks like a speck on the sensor. Some members reported a success with the vacuum cleaner approach - either sucking through the lens or through the battery compartment. But it does not seem to work reliably and always is on the owner's risk.

Peter
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Re: Stained pictures

Postby vinzbaud » Mon Mar 23, 2015 7:26 pm

I tried the vacuum through both options without any luck ... Guess I'm good for sending it to service :'(
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Re: Stained pictures

Postby Sazsadin » Fri May 12, 2017 7:30 am

hope you're right
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