Never thought about this: minimum focus distance?

[Vonder]

I just got my first AF lens for my Pentax 645IIN. I saw that the minimum focus distance was 1 meter, but when I went to take some test shots it focused much closer. Got me thinking. Is the minimum focus distance from the front of the lens, or from the film plane?

 

[HiHoSilver]

Its to the film plane.

 

[bobbotron]

Ha, and the 645's are pretty long cameras too, to the film plane gives you few extra inches compared to the lens!

 

[Sirius Glass]

Its to the film plane.

Yep

 

[paul ron]

its also how you use dof to get you in even closer too.

my rb 50mm can get down to a few inches to infinity at max f-stop.

 

[Sirius Glass]

Use close up tubes, bellows, and with some cameras reversing the normal lens.