- Posts: 5
- Joined: Sat May 04, 2019 4:00 am
- Real Name: Mike Chan
Hi everyone, many thanks for stopping by and help! I've just bought a second hand ursa mini 4.6k, which is out of warranty, and noticed there might possibly be a fixed patterned noise issue (vertical blue lines in shadow area, IRE>20). Here's the Prores HQ footage straight out of the camera, these footage are all taken after the black shading calibration, firmware 4.4, and with detail sharpening turned off.
Download link:
https://mega.nz/#F!HggHAYDA!t7QNrBWleQTNsB2D-_ieIA
I do understand I have underexposed the picture a lot, and I should never underexpose that much when filming. But I am just purposefully testing out the camera's limit so to learn to use it properly when working on paid gigs. From the scope, once it's hitting below IRE 20, I can see that the vertical blue lines easily. So my question is:
1. Is these vertical blue lines normal? If not, will blackmagic support repair it even it's not in warranty? Will it be expensive? Or should I just return the camera to the seller?
2. If the of vertical blue lines noise is normal, what should I do to minimize the issue? Expose carefully and crash anything under 20 IRE to the black? Light anything needed to be black above 20 IRE? Use Davinci Resolve to De-noise when needed? Any other tips and tricks?
Many Thanks again everyone!
Download link:
https://mega.nz/#F!HggHAYDA!t7QNrBWleQTNsB2D-_ieIA
I do understand I have underexposed the picture a lot, and I should never underexpose that much when filming. But I am just purposefully testing out the camera's limit so to learn to use it properly when working on paid gigs. From the scope, once it's hitting below IRE 20, I can see that the vertical blue lines easily. So my question is:
1. Is these vertical blue lines normal? If not, will blackmagic support repair it even it's not in warranty? Will it be expensive? Or should I just return the camera to the seller?
2. If the of vertical blue lines noise is normal, what should I do to minimize the issue? Expose carefully and crash anything under 20 IRE to the black? Light anything needed to be black above 20 IRE? Use Davinci Resolve to De-noise when needed? Any other tips and tricks?
Many Thanks again everyone!