DVL-Digest 1274 - Postings: Index Fabulous DV storm info what is relationship between 75% zebra & gray card - (2) Fabulous DV storm info - "Perry Mitchell" From: Andy Yeah I'd be wary about any manufacturers marketing hype, I'm sure this link has just as much! http://www.matrox.com/video/products/rtx100/rtx100_vs_dvstormseplus.cfm what is relationship between 75% zebra & gray card - "Perry Mitchell" From: King Cheung hi list, first of all, thank you for all the advices about the posting of exposure for DV shooting. However, please forgive my ignorance, but I don't quite get the relationship between 75% zebra and gray card. I do understand that 1./ the auto iris is based on gray card (or medium gray) 2./and 75% zebra means everything in the scene having the "last" 25% brightness will be shown in zebra pattern (am I right about this, anyway?) 3./ the gray card reflects 18% of the light so I am a little bit confused how to put a 18% reflective gray card and 75% zebra pattern together to determine the exposure. Also, I see the term 75IRE. Since I am not familiar about Beta, so I am wondering if IRE is the same thing as zebra. Please educate me. King what is relationship between 75% zebra & gray card - "Perry Mitchell" From: Jeff Lewin Thanks for the great info, A couple questions. My TRV-900 has a zebra pattern. Generally, when shooting, I make sure that not too much of my shot is showing up with the zebra markings. I'm not sure what type of zebra this camera has, (75%? 100%?) does anyone else know? Obviously I don't have a very thorough understanding of exposure. I do understand the basics, but what does a gray chart tell you? How is luminance relevant to getting good color? What is the link there? What is it's relation to color balance? Can a waveform monitor (PC VERSION) be used after the shot? Looking at the waveform, what is the perfect waveform going to look like? (diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-) [up] |
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