Distance from camera

[regken]

Hi,
I have done several searches and haven’t come up with an answer yet so I’m turning to you folks. When photographing an object with a 50mm lens six feet in front of the camera it fills the full frame. The question is if I use a 500mm lens how far away does the object have to be to get the same full frame picture. There must be a formula for this equation. Can you help me out?

Thanks,
Ken

[Jonathan Wienke]

The answer is 10x the distance. The formula should be self-explanatory.

[regken]

That's not what I am looking for. Let me try it this way. When a particular object is shot with a 50mm lens from a distance of six feet it fills the full frame. How many feet do you have to be away from that same object if you use a 500mm lens.
Thanks,
Ken

[AJSJones]

If 60 ft as the answer to the question ( i.e. 10x the 6ft for the 50mm lens) isn't what you're looking for, you'll have to ask it a different way!

[regken]

Thanks! The answer was to simple. I couldn't see it. Sometimes My ignorance is only surpassed by my stupidity.
Ken

[dwdallam]

The answer is 10x the distance. The formula should be self-explanatory.

I think these guys know all--WIZARDS--lol.

[dwdallam]

If 60 ft as the answer to the question ( i.e. 10x the 6ft for the 50mm lens) isn't what you're looking for, you'll have to ask it a different way!

LOL, I was just thinking that same thing.

[dwdallam]

Thanks! The answer was to simple. I couldn't see it. Sometimes My ignorance is only surpassed by my stupidity.
Ken

Ken,

We must be related.