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06-14-2015, 03:52 AM   #1
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Odd Flare/Lines with Long Exposures (K3II)

I was taking some long exposures and had some odd results. Really odd flare to the top right of the frame (Redish colour) and odd lines across the bottom (long edge) of the frame, both when facing roughly towards the sun and away.

Some were completely fine, some had it a bit and some were really bad.

All taken with the K3II, FA20-35 or FA43 with no hood and 77mm 10-Stop ND and CPL filter via Adapter. First lot are shot RAW, converted straight with Lightroom with no PP.










And the ones that were OK










---------- Post added 06-14-15 at 11:57 AM ----------

And two of the worst ones.....







06-14-2015, 04:00 AM   #2
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Were the lines appearing in the earlier shots in the sequence, later or randomly?

Whoa!! The worst ones are worse! Have a quick look at the lens mounting ring and make sure the screws are tight. Put the lens cap on and take a bulb exposure with a torch shining all over the lens barrel. I had a flare occur years ago in an MZ-50 film camera a bit like this as a result of light leaking into a loose lens mount. Not sure about the lines. The worse ones look too soft to be a sensor issue, but they are very straight...

Last edited by jawsy; 06-14-2015 at 04:08 AM. Reason: Just saw the worst ones.
06-14-2015, 04:02 AM   #3
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Did you cover up the viewfinder? This looks like a light leak trough the viewfinder. Something I found out the first time I used the K-3 for long exposures. There should be a ME Finder Cap in the box you can use to prevent this.
06-14-2015, 04:02 AM   #4
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As I say, some had it bad, some not at all. They only showed up in long exposures though, may be a combination of flare, f22 aperture, 25-30 sec exposure.....

Edit, yes, feel a bit stupid now, I did not put the rear eyepeice cap on!

06-14-2015, 04:15 AM   #5
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Don't feel stupid, feel relieved! There's nothing worse than thinking you've scored the one-in-a-thousand dud.
06-14-2015, 04:59 AM   #6
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Funny, I was having the same problem a couple of days ago and I thought it was because of the square filters I was using.
06-14-2015, 10:20 AM   #7
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I'd suggest using a lens hood AND the viewfinder cap.
Tackle any issues of flare and internal reflections, light leaks etc from both ends.
06-14-2015, 12:41 PM   #8
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Thanks chaps, just done a test with and without the eye cap on a long exposure with a light shining around the viewfinder and reproduced exactly the same flare and lines on the original photos. Bit annoyed now, I ruined some great shots!
I did not have this problem with the K-01

06-14-2015, 12:53 PM   #9
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This is why it is a good idea to always wear a hat of some kind, one you can take off and put over the camera during long exposures. I have a tightly woven black tuque (a.k.a winter hat) that I keep in my astrophoto bag. It is ideal since it wraps around the whole viewfinder and back of the camera.
06-14-2015, 02:48 PM   #10
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QuoteOriginally posted by hoopsontoast Quote
Thanks chaps, just done a test with and without the eye cap on a long exposure with a light shining around the viewfinder and reproduced exactly the same flare and lines on the original photos. Bit annoyed now, I ruined some great shots!
I did not have this problem with the K-01
I, like you, was surprised when I found out my K-3 demonstrated the same problem. I just had used my waders to pull some shots I normally can't make with out that effort. And my K-5 did not have a light leak. Soon after I learned it is a common problem with lots of camera's and how to prevent it from happening again. It really is no big deal. Enjoy your photography!
06-14-2015, 06:12 PM   #11
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I can confirm this is a light leak through the viewfinder.

Shining a flashlight through the viewfinder in Live View, especially with the lens cap on, will make this apparent. This is not an abnormality or defect—you just need to cover up the viewfinder during long exposures.

—DragonLord
06-14-2015, 07:43 PM   #12
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QuoteOriginally posted by hoopsontoast Quote
I did not have this problem with the K-01
The K-01 has a built in viewfinder cover
06-15-2015, 12:38 AM   #13
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And I always thought it was my filters that was the culprit...
06-15-2015, 12:42 AM   #14
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QuoteOriginally posted by crewl1 Quote
The K-01 has a built in viewfinder cover
Yeah, have to get used to this D-SLR lark, its been a while since I had the K-7 and Sigma SD15.
06-15-2015, 01:08 AM   #15
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Wow great thread, question asked, possible fix suggestions to resolve and the confirmation all is well... before I've even got to finish reading the thread.
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