yellow horizontal bars showing up
- Thread starter thebullfrog
- Start date
Barry_Green
Moderator
Then yeah, those particular lights are using a high-frequency electronic ballast, and you therefore should be safe using any shutter speed or frame rate with them.
thebullfrog
Member
So i did a couple small tests yesterday at my gym. They have the older model ball-set fluorescent lights, so it flickers alot.
In video mode anything higher then 1/60 shutter, definitely shows those yellow bars, higher up you go it's clearly visible.
At 1/60, it's feint, you can just see it a little bit but not a big problem, i just up the iso just a tad bit and its fine and its not noticeable at all.
In picture mode, single shooting 1/60 it's fine if you time your shots....but i'm at a gym where we do lots of gymnastics, and at 1/60 the persons movement gets really blurry and i don't want that.
So i tested out the shutter, Fstop and iso settings and found at 1/125, iso 1000-2000, Fstop around 2 (given i was using a 50mm 1.8 lens) nothing shows up and its a clear non-blurry image (single and high speed shooting)...though its not a perfect still image of the person, theres a little blurriness but still looks good.
Anything lower or higher the 1/125, and the flicker from the lights is apparent...gives it a yellowish hue.
Shooting under an older model ball set fluorescent lights is a pain...but nothing i can do about it.
i'll post some stills in a while showing my findings.
In video mode anything higher then 1/60 shutter, definitely shows those yellow bars, higher up you go it's clearly visible.
At 1/60, it's feint, you can just see it a little bit but not a big problem, i just up the iso just a tad bit and its fine and its not noticeable at all.
In picture mode, single shooting 1/60 it's fine if you time your shots....but i'm at a gym where we do lots of gymnastics, and at 1/60 the persons movement gets really blurry and i don't want that.
So i tested out the shutter, Fstop and iso settings and found at 1/125, iso 1000-2000, Fstop around 2 (given i was using a 50mm 1.8 lens) nothing shows up and its a clear non-blurry image (single and high speed shooting)...though its not a perfect still image of the person, theres a little blurriness but still looks good.
Anything lower or higher the 1/125, and the flicker from the lights is apparent...gives it a yellowish hue.
Shooting under an older model ball set fluorescent lights is a pain...but nothing i can do about it.
i'll post some stills in a while showing my findings.
thebullfrog
Member
Excellent videos from rhervag in the 7D Unknown Artifacts (pg 2) thread
Though he's in europe so it's different shutter settings due to pal, but still useful for NA NTSC.
I'm gonna try to do the same type of test in a few days, but with NTSC settings.
Though he's in europe so it's different shutter settings due to pal, but still useful for NA NTSC.
I'm gonna try to do the same type of test in a few days, but with NTSC settings.
