Amber band at the top OR bottom of images?

mizupsi · 04-16-2017, 01:55 PM

While shooting today, I noticed that over half of the images taken with my k 50mm f1.4 had dark amber bands at the top or bottom of the frame (in the oof areas oddly). This was so unsightly that I ended up switching lenses--no problem so its not a bad shutter or shutter timing issue I don't think. I'll include a few images that show the problem.

Anyway, Has anyone ever had a problem like this? I can't seem to replicate it now, but I find it quite bizarre.

Adam · 04-16-2017, 02:03 PM

Tungsten lighting and a shutter speed >= 1/50s?

DeadJohn · 04-16-2017, 02:08 PM

Was the effect visible in the viewfinder or only in photos?

Any filter on the lens?

---------- Post added 04-16-17 at 05:09 PM ----------

Originally posted by Adam

Tungsten lighting and a shutter speed >= 1/50s?

I wondered about that, but do flickering lights only affect OOF areas?

mizupsi · 04-16-2017, 02:22 PM

Originally posted by Adam

Tungsten lighting and a shutter speed >= 1/50s?

Adam, you are brilliant, thanks. I've never even considered that you have to keep shutter speed below a lights flicker rate. It was florescent lighting, and looking around the net, I see this exact effect. The different color and intensity tones in the same frame is a result I guess of the rolling shutter? I've never had this happen at the same location with my STakumar 50mm 1.4 and was dismayed that my new lens might have issues. This has turned to fascination.

Originally posted by DeadJohn

Was the effect visible in the viewfinder or only in photos?

Any filter on the lens?

---------- Post added 04-16-17 at 05:09 PM ----------

I wondered about that, but do flickering lights only affect OOF areas?

No filter, and wasn't visible through the viewfinder. My guess is that the moons aligned and I just happened to catch the flicker in the oof at the right time.

Thanks guys!

Addendum: I'm reading that a few newer cameras have a flicker mode; do any Pentax bodies have this? It syncs the shutter release to correspond with the brightest point in the cycle. Neat stuff.

LensBeginner · 04-16-2017, 02:23 PM

Originally posted by mizupsi

*snip*
This was so unsightly that I ended up switching lenses--no problem so its not a bad shutter or shutter timing issue I don't think. I'll include a few images that show the problem.

*snip*

BTW, that's a fallacy... the aperture is in the lens, the shutter is in the camera.

mizupsi · 04-16-2017, 02:35 PM

Originally posted by LensBeginner

BTW, that's a fallacy... the aperture is in the lens, the shutter is in the camera.

What I mean, is that if the problem went away by switching lenses, then the problem is the lens. Therefore, not a problem with the shutter which is in-body.

Except, it was a problem with the shutter--it was too fast for the lighting. But it wasn't malfunctioning.
Thanks for trying to clarify anyway.

04-16-2017, 01:55 PM	#1
mizupsi New Member Join Date: Mar 2013 Posts: 24	Amber band at the top OR bottom of images? While shooting today, I noticed that over half of the images taken with my k 50mm f1.4 had dark amber bands at the top or bottom of the frame (in the oof areas oddly). This was so unsightly that I ended up switching lenses--no problem so its not a bad shutter or shutter timing issue I don't think. I'll include a few images that show the problem. Anyway, Has anyone ever had a problem like this? I can't seem to replicate it now, but I find it quite bizarre.

04-16-2017, 02:03 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Tungsten lighting and a shutter speed >= 1/50s? 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:

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04-16-2017, 02:08 PM	#3
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,834	Was the effect visible in the viewfinder or only in photos? Any filter on the lens? ---------- Post added 04-16-17 at 05:09 PM ---------- Originally posted by Adam Tungsten lighting and a shutter speed >= 1/50s? I wondered about that, but do flickering lights only affect OOF areas?

04-16-2017, 02:22 PM	#4
mizupsi New Member Join Date: Mar 2013 Posts: 24 Original Poster	Originally posted by Adam Tungsten lighting and a shutter speed >= 1/50s? Adam, you are brilliant, thanks. I've never even considered that you have to keep shutter speed below a lights flicker rate. It was florescent lighting, and looking around the net, I see this exact effect. The different color and intensity tones in the same frame is a result I guess of the rolling shutter? I've never had this happen at the same location with my STakumar 50mm 1.4 and was dismayed that my new lens might have issues. This has turned to fascination. Originally posted by DeadJohn Was the effect visible in the viewfinder or only in photos? Any filter on the lens? ---------- Post added 04-16-17 at 05:09 PM ---------- I wondered about that, but do flickering lights only affect OOF areas? No filter, and wasn't visible through the viewfinder. My guess is that the moons aligned and I just happened to catch the flicker in the oof at the right time. Thanks guys! Addendum: I'm reading that a few newer cameras have a flicker mode; do any Pentax bodies have this? It syncs the shutter release to correspond with the brightest point in the cycle. Neat stuff.

04-16-2017, 02:23 PM	#5
LensBeginner Veteran Member Join Date: Sep 2014 Photos: Albums Posts: 4,696	Originally posted by mizupsi snip This was so unsightly that I ended up switching lenses--no problem so its not a bad shutter or shutter timing issue I don't think. I'll include a few images that show the problem. snip BTW, that's a fallacy... the aperture is in the lens, the shutter is in the camera.

04-16-2017, 02:35 PM	#6
mizupsi New Member Join Date: Mar 2013 Posts: 24 Original Poster	Originally posted by LensBeginner BTW, that's a fallacy... the aperture is in the lens, the shutter is in the camera. What I mean, is that if the problem went away by switching lenses, then the problem is the lens. Therefore, not a problem with the shutter which is in-body. Except, it was a problem with the shutter--it was too fast for the lighting. But it wasn't malfunctioning. Thanks for trying to clarify anyway.