noahyt
27-Mar-2015, 20:56
Hi! I am just getting into the world of large format cameras, so I'm not quite sure to look for this type of information.
I am trying to build (on a very small college-student budget) a basic camera.
I watched this https://www.youtube.com/watch?v=-G3eI2kH8b8 video and was intrigued by the simplicity of his design, notably the fact that he eschews normal lenses for a single piece of ground glass.
However, as with other threads that I have read, he does not explain how he knew that this element would be able to throw an image large enough to cover the image plane and stay in focus.
As I want to make only the most rudimentary camera (I'm not looking to be able to tilt/shift, or even necessarily have super clear corners) I'd like to find out how to calculate what type of single element will create a given image circle size.
Can this be calculated from just the focal length, the diopter? I've been looking around surplus shed http://www.surplusshed.com/ and it seems like you can get pretty specific for the type of lens you want. The problem is, I don't even know what I'm looking for without the image circle size listed.
Thanks!
I am trying to build (on a very small college-student budget) a basic camera.
I watched this https://www.youtube.com/watch?v=-G3eI2kH8b8 video and was intrigued by the simplicity of his design, notably the fact that he eschews normal lenses for a single piece of ground glass.
However, as with other threads that I have read, he does not explain how he knew that this element would be able to throw an image large enough to cover the image plane and stay in focus.
As I want to make only the most rudimentary camera (I'm not looking to be able to tilt/shift, or even necessarily have super clear corners) I'd like to find out how to calculate what type of single element will create a given image circle size.
Can this be calculated from just the focal length, the diopter? I've been looking around surplus shed http://www.surplusshed.com/ and it seems like you can get pretty specific for the type of lens you want. The problem is, I don't even know what I'm looking for without the image circle size listed.
Thanks!