12-06-2017 11:17 PM
I just got back from my holiday and have been using the Hero 6 there quite actively.
Being autumn in Japan, it was predominantly cloudy and grey most of the time.While the video quality truly did amaze me, there were certain times where the captured images were simply unusable due to the purple fringing. I am wondering if I can do anything to improve the situation?
Settings: ProTune Enabled , WB on Auto, ISO max 800 and Min 100
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12-08-2017 06:39 AM - edited 12-08-2017 06:44 AM
"hungry" for light ...
light is everithing
in photo community there is a saying:
" the beginners concern is about the equipment.... the amateurs concern is about the settings...the prosumers concern is the lack of subjects... and the pro concern is about light.."
so GP6 is a pro...
I think GoPro change the way camera sets automatically (if allowed...) the parameters.
beeing an action camera, the first prio is to keep the shutter as low as possible
therefore will push the ISO.
same picture...in da office....PT-off (all auto) and PT-on ISO max=100
PT-on ISO max=100 ... shutter 1/12sec is not an "action" shutter
PT-off ...>> ISO=1202 shutter=1/143 - more close to an "action" but noisy...
in v01.51 this blue fringing was present...this is a picture contre jour taken in the autumn....
in v01.60 I do not see that obvious fringe...
I made a test:
here is the original picture taken at ISO (min) 100,(200),400,800,1600,3200
I cropped approximatively the red area from each (I skipped ISO-200)
yes, above 1600, there is a blue there around the tree branches.... but it is mostly a colour noise, normal at higher ISO...
12-07-2017 02:51 PM
I did read on a photography web site, I'll look for the link but don't have it now, that Gorrilla glass can create a general defocus of the shortest wavelengths resulting in a purple fringe when the light hits it at certain angles. I did some test with and without the lens cover. I didn't see any difference.
12-07-2017 06:43 PM
Good question...I recall upgrading it some time during the trip but cannot be sure if it was before this photo was taken or not. Possibily not. I will attempt to take some more photos this weekend to see if the issue still persists.
12-07-2017 07:17 PM
Would it be a good idea to lower the max ISO to 400 ? The abberation does seem to appear more when it involves me pointing the GP to trees that have the sky peeking through in the background. I noticed that in other photos as well where there are trees.
I will post more samples if I see this happening even in well-lit areas. I definitely did not see any during my trip when it was bright and sunny.
I must say, even with a better performance under low-light compared to the GP4, the GP6 still is hungry for light that is for sure.