But, if the camera's eyepiece is focused on the plane of the screen (as
it should be), if I remove the screen why wouldn't focusing the aerial
image using the lens also focus on the film plane.
Chuck Norcutt
Alan Wood wrote:
> Chuck Norcutt wrote:
>
>>I've never understood this clear screen/aerial image
>>business. Why is
>>focusing the aerial image on the camera different from focusing the
>>aerial image on a microsope or telescope?
>>
>
> When you look through a microscope (assuming that you do not have a camera
> attached), it does not matter if the aerial image is exactly where the
> manufacturer intended - you just adjust the focus to suit your eyes.
>
> However, when a camera is involved, then you must get the aerial image
> focused exactly on the cross-hairs, because the camera is designed so that
> when the aerial image is focused on the cross-hairs, then the real image is
> also focused on the film.
>
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