K-3 Random overexposure

Started 10 months ago | Discussions thread
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Ken Barley
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K-3 Random overexposure
10 months ago

I had an unusual problem with my K-3 today, which happened on a few shots and went away.

Took a shot which came out overexposed on LCD.

Took it again and correctly exposed.

But the exposure was identical to first shot.

Shooting with 18-135 and on latest firmware

The following is screenshot from ACR 8.3 with NO adjustments. It is not just the embedded jpeg affected. The RAW file is also over exposed.

Overexposed version on left; correct on right

One thing I have noticed is that the overexposed version has file size of 40mb; the correctly exposed on is 33mb

EXIF for K3000661

File name: D:\Users\ken\My Pictures\K3000661.DNG
File type: Adobe Digital Negative
File size: 40,497.9 KB
Creation date: 20/02/2014 14:08
Last modification: 20/02/2014 14:08
Make: RICOH IMAGING COMPANY, LTD. (http://www.nikon.com)
Camera: PENTAX K-3
Software: PENTAX K-3 Ver. 1.02
Dimension: 6080 x 4032 px (24.5 MP, 3:2)
Focal length: 18 mm (equiv. 27 mm)
Aperture: F8
Exposure time: 1/320"
ISO speed rating: 100/21°
Program: Aperture priority
Metering Mode: Pattern
White Balance: Auto
Flash: Flash did not fire, compulsory flash mode

EXIF for K3000662

File name: D:\Users\ken\My Pictures\K3000662.DNG
File type: Adobe Digital Negative
File size: 33,391.8 KB
Creation date: 20/02/2014 14:08
Last modification: 20/02/2014 14:08
Make: RICOH IMAGING COMPANY, LTD. (http://www.nikon.com)
Camera: PENTAX K-3
Software: PENTAX K-3 Ver. 1.02
Dimension: 6080 x 4032 px (24.5 MP, 3:2)
Focal length: 18 mm (equiv. 27 mm)
Aperture: F8
Exposure time: 1/320"
ISO speed rating: 100/21°
Program: Aperture priority
Metering Mode: Pattern
White Balance: Auto
Flash: Flash did not fire, compulsory flash mode

Any ideas?

Ken

Pentax K-3 Pentax K-30
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