What setting did this? (weird shadow, K-70, 18-135mm WR kit lens)

Sagitta · 08-24-2021, 07:48 PM

I usually shoot RAW, but I'm still learning the ins and outs of the K-70 (having a tougher go at that than going from the K-30 to the K-3!). I was taking some random shots of my boys, and apparently kicked the camera into JPG only mode by mistake, and this happened. Photos were in succession, so no settings were changed between them.

What caused it, and what do I need to tweak to avoid it in the future? Is it something with the shadow corrections?

Filename - 20210822-IMGP0651.jpg
Make - RICOH IMAGING COMPANY, LTD.
Model - PENTAX K-70
XResolution - 73
YResolution - 73
ResolutionUnit - Inch
Software - Adobe Photoshop Lightroom Classic 10.4 (Windows)
DateTime - 2021:08:24 22:35:22
Artist - JOHN ROBERTS, JR
ExifOffset - 266
ExposureTime - 1/100 seconds
FNumber - 4.50
ExposureProgram - Aperture priority
ISOSpeedRatings - 400
ExifVersion - 0231
DateTimeOriginal - 2021:08:22 14:50:39
DateTimeDigitized - 2021:08:22 14:50:39
OffsetTime - -04:00
ShutterSpeedValue - 1/100 seconds
ApertureValue - F 4.50
ExposureBiasValue - 0.00
MeteringMode - Multi-segment
Flash - Flash not fired, compulsory flash mode
FocalLength - 53.00 mm
ColorSpace - sRGB
SensingMethod - One-chip color area sensor
FileSource - DSC - Digital still camera
SceneType - A directly photographed image
CustomRendered - Normal process
ExposureMode - Auto
White Balance - Auto
FocalLengthIn35mmFilm - 79 mm
SceneCaptureType - Standard
Contrast - Normal
Saturation - Normal
Sharpness - Normal
SubjectDistanceRange - Macro
Lens Info - 18.00 135.00 3.50 5.60
Lens Model - smc PENTAX-DA 18-135mm F3.5-5.6 ED AL[IF] DC WR

Thumbnail: -
Compression - 6 (JPG)
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
JpegIFOffset - 914
JpegIFByteCount - 7881

MarkJerling · 08-24-2021, 07:56 PM

Odd. I've never seen anything like that!

stevebrot · 08-24-2021, 08:06 PM

To the best of my knowledge, there is no setting or combination of settings that might result in the difference between the two frames. OOF gnat near the camera?

Steve

Sagitta · 08-24-2021, 08:13 PM

Originally posted by stevebrot

To the best of my knowledge, there is no setting or combination of settings that might result in the difference between the two frames. OOF gnat near the camera?

Steve

The photo before these two showed the same weird over-shadowed bit (only this time it was by his ear). Its like the camera went "I *like* this shadow, I'm keeping it!".

As I said, I usually shoot RAW because JPGs are JPGs and I love to tweak, but its also something I'd rather not have to fix in post.

This was the first shot in the sequence - it shows around his ear here.

**UncleVanya** · 08-24-2021, 08:39 PM

I was going to suggest an artifact of the accelerator… but that kicks later I thought based on photos to photos data (starts between 500 and 630 iso)

vonBaloney · 08-24-2021, 08:46 PM

Bizarre compression artifact? (Jpeg compression/quality setting is not on max)

Adam · 08-24-2021, 08:55 PM

A shadow from the scene, perhaps?

Adam
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Sagitta · 08-24-2021, 09:08 PM

Originally posted by Adam

A shadow from the scene, perhaps?

Not sure what it would have been from, save maybe myself. Most of the light was backlighting, save for the overhead fluorescents, and those generally just cause banding if I remember right.

Shot this one a bit later from further away, but thats where he'd been sitting the entire time.

zapp · 08-24-2021, 10:05 PM

Dust moving across the sensor or in front of it somewhere.

Sagitta · 08-24-2021, 10:47 PM

Originally posted by zapp

Dust moving across the sensor or in front of it somewhere.

Thats a possibility! I'll have to check to see if I have any dust bunnies inhabiting the camera already.

stevebrot · 08-24-2021, 10:59 PM

Originally posted by Adam

A shadow from the scene, perhaps?

Not the scene per se, but something partially blocking the light for that side of his face. The second version appears to be a gingerbread man.

Originally posted by Sagitta

Shot this one a bit later from further away, but thats where he'd been sitting the entire time.

...and what was over your left shoulder when you were closer?

Steve

Kozlok · 08-25-2021, 08:22 AM

Looks like dust on the sensor to me. If it isn't actually stuck to the sensor, it could move around.

Wheatfield · 08-25-2021, 08:50 AM

It's probably a bit of lint wandering around in the light path in the mirror box.
Lock the mirror up and see if you can spot it in front the shutter, if you can't them open the shutter and see if you can spot it in front of the sensor. I've had it happen where a bit of lint gets caught in the shutter frame and shows smudges similar to that.

Sagitta · 08-25-2021, 08:27 PM

Originally posted by stevebrot

Not the scene per se...and what was over your left shoulder when you were closer?

Steve

A big empty dining room.

stevebrot · 08-25-2021, 08:51 PM - **1 Like**

Originally posted by Sagitta

A big empty dining room.

Only one solution...

You Tube

Steve

08-24-2021, 07:48 PM	#1
Sagitta Veteran Member Join Date: Feb 2011 Location: Maine Photos: Gallery Posts: 3,081	What setting did this? (weird shadow, K-70, 18-135mm WR kit lens) I usually shoot RAW, but I'm still learning the ins and outs of the K-70 (having a tougher go at that than going from the K-30 to the K-3!). I was taking some random shots of my boys, and apparently kicked the camera into JPG only mode by mistake, and this happened. Photos were in succession, so no settings were changed between them. What caused it, and what do I need to tweak to avoid it in the future? Is it something with the shadow corrections? Filename - 20210822-IMGP0651.jpg Make - RICOH IMAGING COMPANY, LTD. Model - PENTAX K-70 XResolution - 73 YResolution - 73 ResolutionUnit - Inch Software - Adobe Photoshop Lightroom Classic 10.4 (Windows) DateTime - 2021:08:24 22:35:22 Artist - JOHN ROBERTS, JR ExifOffset - 266 ExposureTime - 1/100 seconds FNumber - 4.50 ExposureProgram - Aperture priority ISOSpeedRatings - 400 ExifVersion - 0231 DateTimeOriginal - 2021:08:22 14:50:39 DateTimeDigitized - 2021:08:22 14:50:39 OffsetTime - -04:00 ShutterSpeedValue - 1/100 seconds ApertureValue - F 4.50 ExposureBiasValue - 0.00 MeteringMode - Multi-segment Flash - Flash not fired, compulsory flash mode FocalLength - 53.00 mm ColorSpace - sRGB SensingMethod - One-chip color area sensor FileSource - DSC - Digital still camera SceneType - A directly photographed image CustomRendered - Normal process ExposureMode - Auto White Balance - Auto FocalLengthIn35mmFilm - 79 mm SceneCaptureType - Standard Contrast - Normal Saturation - Normal Sharpness - Normal SubjectDistanceRange - Macro Lens Info - 18.00 135.00 3.50 5.60 Lens Model - smc PENTAX-DA 18-135mm F3.5-5.6 ED AL[IF] DC WR Thumbnail: - Compression - 6 (JPG) XResolution - 72 YResolution - 72 ResolutionUnit - Inch JpegIFOffset - 914 JpegIFByteCount - 7881

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08-24-2021, 07:56 PM	#2
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,423	Odd. I've never seen anything like that!

08-24-2021, 08:06 PM	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	To the best of my knowledge, there is no setting or combination of settings that might result in the difference between the two frames. OOF gnat near the camera? Steve

08-24-2021, 08:13 PM	#4
Sagitta Veteran Member Join Date: Feb 2011 Location: Maine Photos: Gallery Posts: 3,081 Original Poster	Originally posted by stevebrot To the best of my knowledge, there is no setting or combination of settings that might result in the difference between the two frames. OOF gnat near the camera? Steve The photo before these two showed the same weird over-shadowed bit (only this time it was by his ear). Its like the camera went "I like this shadow, I'm keeping it!". As I said, I usually shoot RAW because JPGs are JPGs and I love to tweak, but its also something I'd rather not have to fix in post. This was the first shot in the sequence - it shows around his ear here.

08-24-2021, 08:39 PM	#5
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,472	I was going to suggest an artifact of the accelerator… but that kicks later I thought based on photos to photos data (starts between 500 and 630 iso)

08-24-2021, 08:46 PM	#6
vonBaloney Pentaxian Join Date: Oct 2011 Location: Albuquerque, NM Posts: 6,029	Bizarre compression artifact? (Jpeg compression/quality setting is not on max)

08-24-2021, 08:55 PM	#7
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	A shadow from the scene, perhaps? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

08-24-2021, 09:08 PM	#8
Sagitta Veteran Member Join Date: Feb 2011 Location: Maine Photos: Gallery Posts: 3,081 Original Poster	Originally posted by Adam A shadow from the scene, perhaps? Not sure what it would have been from, save maybe myself. Most of the light was backlighting, save for the overhead fluorescents, and those generally just cause banding if I remember right. Shot this one a bit later from further away, but thats where he'd been sitting the entire time.

08-24-2021, 10:05 PM	#9
zapp Pentaxian Join Date: Jul 2011 Posts: 2,389	Dust moving across the sensor or in front of it somewhere.

08-24-2021, 10:47 PM	#10
Sagitta Veteran Member Join Date: Feb 2011 Location: Maine Photos: Gallery Posts: 3,081 Original Poster	Originally posted by zapp Dust moving across the sensor or in front of it somewhere. Thats a possibility! I'll have to check to see if I have any dust bunnies inhabiting the camera already.

08-24-2021, 10:59 PM	#11
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Adam A shadow from the scene, perhaps? Not the scene per se, but something partially blocking the light for that side of his face. The second version appears to be a gingerbread man. Originally posted by Sagitta Shot this one a bit later from further away, but thats where he'd been sitting the entire time. ...and what was over your left shoulder when you were closer? Steve

08-25-2021, 08:22 AM	#12
Kozlok Pentaxian Join Date: Jun 2012 Location: Albuquerque Photos: Gallery Posts: 3,148	Looks like dust on the sensor to me. If it isn't actually stuck to the sensor, it could move around.

08-25-2021, 08:50 AM	#13
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,991	It's probably a bit of lint wandering around in the light path in the mirror box. Lock the mirror up and see if you can spot it in front the shutter, if you can't them open the shutter and see if you can spot it in front of the sensor. I've had it happen where a bit of lint gets caught in the shutter frame and shows smudges similar to that.

08-25-2021, 08:27 PM	#14
Sagitta Veteran Member Join Date: Feb 2011 Location: Maine Photos: Gallery Posts: 3,081 Original Poster	Originally posted by stevebrot Not the scene per se...and what was over your left shoulder when you were closer? Steve A big empty dining room.