In analyzing the photon transfer performance of a digital camera, it is usual to construct a model of the camera’s imaging properties, and then determine the parameters of these properties should the camera under test conformed to the model. It is also useful to know those areas for the camera does not work as the… [Read More]
Automatic sensor characterization, an introduction
You may have noticed a decrease in the number of my postings over the last month or so. It’s not that I’ve been idle. Quite the contrary, I’ve been working on a major project. In this post, I’d like to introduce you to it. Usually, I work alone. However, in the effort I’m going to… [Read More]
Stay with medium format?
Yesterday, I posted an email that I sent to a friend, asking for advice. Here’s his answer: I feel your pain. I have pissed away more money on electronic imaging gear over the years than I care to think about – including over $100K for an Optronics drum scanner in the early 90’s. I’ve made… [Read More]
Getting off the medium format merry-go-round?
I recently sent the following email to a friend, who is also a very experienced and knowledgeable photographer. I recently received a copy of the Zeiss Otus 85 mm lens. I haven’t done much with it, but it appears to be, in its own way, even more amazing than the 55 mm. Hold that thought…. [Read More]
Otus 85mm on the a7R & D810
I’ve been using the 85 mm f/1.4 Zeiss Otus recently. It is, I believe, an even better lens than the 55 mm. It’s not just that it is so sharp, or so contrasty or so free from distortion – the images just look right. The photographic term of art for this is that the lens… [Read More]
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