The Sleeping Giant's Sea Lion

by Jakub

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24

First of all, it was an issue on film. If Bryan Peterson wasn't aware of it at the time, it just shows what he didn't know, not that it actually wasn't a problem. There were differences though. First of all, we didn't have EXIF data, and most people didn't keep careful enough notes to really know why shot X came out quite a bit sharper than shot Y. Even for ...


14

He initially pointed his camera so that the green leaves were in the center of the viewfinder. He didn't do this because he wanted them in the center of the photograph; he did this so that he could take a meter reading off the leaves, probably using spot metering, which is a metering mode that's sensitive to only a small area in the center of the view ...


8

With an old fully manual aperture lens you want to meter wide open so you give the metering sensor as much light to work with as possible. However with a fully electronic camera the aperture stays open 'till the point of exposure so all meter readings are taken wide open. With this in mind I can't think of any reason why you'd want to meter with the camera ...


6

You're right, he mostly likely could have set his camera to f/22 first and then metered. But that doesn't appear to be how he works. One of the major principles he talks about in Understanding Exposure is that there are often at least 6 combinations of aperture and shutter speed that will give you the same technically correct exposure, but after you've ...


5

On digital cameras the Diffraction Limited Aperture (DLA) is determined by the size of the sensor's pixels. With film it was the size of the grains in the emulsion, thus the DLA of the same camera/lens combination would vary based on the film being used. This is because it is related to the size of the circle of confusion for a given aperture. With a digital ...


4

All the 'Brothers' in Understanding Exposure are an attempt to give you a simple, normally consistent thing that you can meter off that shouldn't be too far to the extreme. Metering off the sky, plant foliage, and other reflectively moderate items give you a solid baseline. The idea is that here is an object that relative to the normal scene should be a ...


4

I know this isn't a proper answer to your question but I wanted to avoid to lengthen the comments thread on the first (and good) answer. I just took a Siemens test pattern (from http://fotofreaks.de/fototechnik/siemensstern/Siemensstern_v1.1.pdf) and checked my DSLR's (Pentax K-20D with 18-135mm WR Pentax zoom) resolution. My tests showed that, at various ...


3

Custom Function 05 stands for "flash metering mode" and setting its value to 3 means "external manual metering". This setting, however, is meant for automatic flash exposure using the light sensor on 580EX II where only input values (aperture and ISO) are entered manually (instead of getting them electronically from body, as in the automatic setting 2). To ...


1

As another possibility, I wonder if he's trying to more accurately meter, considering reciprocity failure. I found two references for it from Wikipedia and Geoff Lawerence. The Geoff Lawerence link is more succinct. Reciprocity failure, as I understand it, is that as your exposure time is increased, metering accuracy decreases. The link on Wikiedia only ...


1

A -2/3rds, as I recall, only is if you are primarily focusing on green things, specifically the dark green leaves that are common in some areas. Recomposing the scene usually involves focusing on a point, and then changing where the camera is pointed to get the optimal picture.



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