Aaron Solomon Posted September 13, 2010 Share Posted September 13, 2010 So aside from being able to cram more pixel's on a larger sensor, what's the advantage of having a larger sensor? Depth of field? And what about having more pixels? Why not smaller pixels on a larger sensor to produce a "finer" image? Thanks, Aaron Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted September 13, 2010 Premium Member Share Posted September 13, 2010 It's a trade off. the smaller your pixel, or in the case of film even, your crystal, the less of a chance it has of being struck by a photon, and hence the less light is recorded. So if we have a given chip size and want to add in more pixels, say going from 2K to 4K, we loose sensitivty to light. Having a pixel of a certain size is therefore a way of getting higher resolution and the same or greater sensitivity to light. In the case of digital cinema, sensory sizes want to closely match the physical sizes of motion picture film to allow for one to use the same lenses and accessories which already exist. Depth of Field Characteristics are also important in terms of film-making, but a larger sensory doesn't necessarily mean a shallower DoF which is based on many other factors, such as subject/object distances. Link to comment Share on other sites More sharing options...
Aaron Solomon Posted September 13, 2010 Author Share Posted September 13, 2010 So ideally we want a huge sensor to cram tons of pixels on for high resolution and make the sensor big enough that the pixels are still large enough to be hit by photons? Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted September 13, 2010 Premium Member Share Posted September 13, 2010 Yep, Ideally we want larger sensors, to a point, to give us enough room for good sized pixels and good enough resolution. Link to comment Share on other sites More sharing options...
Aaron Solomon Posted September 13, 2010 Author Share Posted September 13, 2010 Sorry I know this is off the topic, but about field of view, how is that determined? What affects it? Are the different distances between objects that we apparently see when lenses have different focal lengths results of changes in field of view? Link to comment Share on other sites More sharing options...
Aaron Solomon Posted September 13, 2010 Author Share Posted September 13, 2010 Thanks for everything by the way. Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted September 13, 2010 Premium Member Share Posted September 13, 2010 http://en.wikipedia.org/wiki/Field_of_view and no problem. Field of view is essentially what the lens can see, so you're on target with your summation of it. Link to comment Share on other sites More sharing options...
Aaron Solomon Posted September 13, 2010 Author Share Posted September 13, 2010 I just have a question, when you're planning out a shot, do you actually take into account angle of view? and do you use a light meter when you're shooting digital? or just play it by eye? Link to comment Share on other sites More sharing options...
Premium Member John Sprung Posted September 13, 2010 Premium Member Share Posted September 13, 2010 So aside from being able to cram more pixel's on a larger sensor, what's the advantage of having a larger sensor? Depth of field? And what about having more pixels? Why not smaller pixels on a larger sensor to produce a "finer" image? Thanks, Aaron We like big chips for shallow DOF -- up to a point. Go significantly bigger than, say, VistaVision, and the focus puller's job becomes damn near impossible. We like big photosites (pixel isn't really the right word, but it gets misused a lot) for high dynamic range, and because there's necessarily some non-light-sensitive space between the photosites, which can't be scaled down any smaller. Make the pixels smaller, and you have to give more silicon to the dead area between them. That results in a more severely undersampled image. So, there's a tradeoff between more pixels and better pixels. -- J.S. Link to comment Share on other sites More sharing options...
Aaron Solomon Posted September 14, 2010 Author Share Posted September 14, 2010 Thanks! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now