Who else has this iPhone app

http://setmycamera.com​/Products/SMC_Pro/SMC_​Pro.html

The hyperfocal had me lost in space, didn't OR maybe still don't have a clue to what it was/is telling me.
I have some bushes 42' from my front door (measured with laser measure), I always focused on a bush and used the f stop to control DOF, so I checked the app entered the 50mm lens I had on the camera, f/8.0 , entered in the 42'
The Near Focus was 23,6' Focus was 42' and Far Focus was 186.9' Now here is where I got lost in space.

The Hyperfocal now says Near H Focal is 27.0' the Hyperfocal was 54.1' and the Far H Focal was infinity.
I didn't want to change the f/8.0 setting, So I played around with the Lens and Distance settings but for some reason I didn't get the planets to line up with each other, so last night I set the Distance back to 42' and started moving the Lens thumb wheel and when I got to the Lens setting of 44mm here is what I got.

20.9' 42' Infinity
Near Focus Focus Far Focus

20.9' 41.9 Infinity
Near H Focal Hyperfocal Far H Focal

Before you put me on your ignore list, would you please tell me if I am understanding and using the app correctly or am I just ranting and drifting deeper into outer space.
Thanks
Don

I don't know anything about your app, but if you're talking about depth of field and hyperfocal distance maybe I can help.
As you know, DOF depends on focal length, aperture and focus distance.
Hyperfocal distance is the focus distance that gives the largest possible depth of field (DOF) from half that distance to infinity.
So hyperfocal distance is the closest you can focus to be sharp to infinity. DOF can run from the halfway to the focus point to infinity without it being at the hyperfocal distance, but the closest in focus point will be farther away.

Your DOF calculator gives you two sets of numbers, depending on your input of focal length, aperture and distance.
1) It tells you the depth of field based on those three numbers: the closest that things are acceptably sharp, the focus distance, and the farthest that things are acceptably sharp. The DOF.
2) At the same time it gives you the hyperfocal information for that focal length/aperture combination. Focus on that distance, and everything from half that distance to infinity should be acceptably sharp.

So simple arithmetic says that if you enter a focal length, aperture and the (hyperfocal) focus distance for that combination, the app will tell you 1) the DOF and 2) Hyperfocal and those two will be the same. In your little test you varied the focal length until hyperfocal equaled your desired focus distance.
I hope this helps a bit.

JWdlft wrote in post #17474795
I don't know anything about your app, but if you're talking about depth of field and hyperfocal distance maybe I can help.
As you know, DOF depends on focal length, aperture and focus distance.
Hyperfocal distance is the focus distance that gives the largest possible depth of field (DOF) from half that distance to infinity.
So hyperfocal distance is the closest you can focus to be sharp to infinity. DOF can run from the halfway to the focus point to infinity without it being at the hyperfocal distance, but the closest in focus point will be farther away.

Your DOF calculator gives you two sets of numbers, depending on your input of focal length, aperture and distance.
1) It tells you the depth of field based on those three numbers: the closest that things are acceptably sharp, the focus distance, and the farthest that things are acceptably sharp. The DOF.
2) At the same time it gives you the hyperfocal information for that focal length/aperture combination. Focus on that distance, and everything from half that distance to infinity should be acceptably sharp.

So simple arithmetic says that if you enter a focal length, aperture and the (hyperfocal) focus distance for that combination, the app will tell you 1) the DOF and 2) Hyperfocal and those two will be the same. In your little test you varied the focal length until hyperfocal equaled your desired focus distance.
I hope this helps a bit.

Thank you very much for your reply to my post.
I have read, I think it was here on the POTN to get the hyper focal I'd have to backup to get the hyper focal distance, just wondering if the test I did would be the same as moving backwards. I'm always looking for the lazy way to do things
Thanks again
Don