Re: Narrowing the slit on OLD pan cameras

[Devendra Bansal <indphoto@xxxxxxxxxxxxxxxx>]

hey when u narrow slit in front of ur lens basically what u are doing is using
only central part of the lens and also reducing the image area that will
constantly overlap thereby giving u more blur.

MMagid3005@xxxxxxx wrote:

> Alan -- I understand that if the film is not at the focal length the image
> will be blurred.  But please explain why narrowing the slit reduces the blur.
>  The shutter speed is faster, but the f/stop remains the same, therefore the
> depth of field (if that's the correct term in this situation) should be the
> same.  I'm having trouble getting past this concept, so please help. -- Marty