4x5

[drew2143]

Hey guys i know this isn't digitally related but i had a question about a 4x5 camera. If you want a 1:1 ratio, how would you calculate it? Would your subject to lens distance have to be equal to you lens to groundglass distance? thanks

[another view]

Hi - this isn't a digital specific forum, so post away with your film questions.

I've only shot 4x5 once so I can't help you here - some others are more experienced with it so hopefully someone can help.

[freygr]

Hey guys i know this isn't digitally related but i had a question about a 4x5 camera. If you want a 1:1 ratio, how would you calculate it? Would your subject to lens distance have to be equal to you lens to groundglass distance? thanks

Yes 1:1 the lense is Dead Center between the film plate and the object, that is physics 101. Now to get your DOF is gooding to be very hard.

[PerPlunk]

To obtain a 1:1 relationship, your lens needs to be focused at twice the flange focal length of the lens. This is approximately twice the focal length of the lens. So for a 90mm lens, the lens standard would be about 180mm from the film plane.

I'd suggest visiting www.lfphoto.info, it has some very detailed information about LF specific technique.