KronTalk
Chronos => Chronos User Discussion => Topic started by: wilheldp on October 03, 2017, 05:30:38 PM
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I have shot several videos with my camera now, and I'm having a lot of trouble getting the subject in focus. I am using the focus peaking, and try to get the greatest concentration of cyan dots on my subject, but everything I shoot seems to come up ever-so-slightly out of focus. I rarely use the kit lens down to F1.2 (shoot mostly in bright sunlight or with Godox + Fresnel directly on subject), so I don't think tiny depth of field is my problem.
Does anybody have any tips for proper focusing? I'm assuming this is just a photography problem (I don't have a lot of experience with manually focusing video lenses), but I can't seem to grasp it after 20 or so videos.
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Once the option to zoom in returns that will be handy and will make things easier.
Until then, I've found putting a card/piece of paper with some sharp black/white text or lines against the subject, focusing that and then doing the shot works for me. But that isn't always possible.
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What resolution(s) are we talking about here? Not to say that getting good focus isn't hard (it definitely can be), but I wonder if you're mistaking sensor softness for blurriness.
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What settings are you typically using for aperture when you're having focusing problems?
Sometimes I find it helps to leave the aperture wide while focusing then close it down after, the increased reduced depth of field makes it easier to find focus.
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Can you post a video here? I think it's likely you're just seeing some image softness as jefish says.
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https://youtu.be/CgfhEjWu2As
Here are some shots I took yesterday at various frame rates. Black Cal has been done on most of those resolutions, and I did a White Balance correction before shooting.
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Difficult to say with that subject matter. You other videos look OK apart from the red colour cast.
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You can always print out a focus target and set the back focus. Mine was off just a touch. Bu that is something I have always checked since I do a lot of CCTV camera set up. They always need to be set since the old cameras did not have a lens.
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Have you tried adjusting backfocus in the camera?
I had to do it for my camera because I have different lenses.
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Have you tried adjusting backfocus in the camera?
I had to do it for my camera because I have different lenses.
Yes...the backfocus ring was loose when my camera arrived (C-CS mount came completely off when I tried to remove the dust cap). When I finally figured out what I had done, I followed the backfocus adjustment procedure in the instruction manual.
I think some of what I'm seeing is softness, and I think some of it might be my inexperience with working with video lenses. DSLRs with auto-focus lenses have spoiled me.