# Thread: Estimate the minimum distance...

1. ## Estimate the minimum distance...

Hi all,
I have 1 question regarding estimate distance, is there any way to estimate how much minimum distance that we need to have in order to capture object object (for example a row of 20 people) using certain focal length (example 28mm)? I just wondering because I think this is quite important (at least for me).

2. ## Re: Estimate the minimum distance...

How good is your geometry and trigonometry?

3. ## Re: Estimate the minimum distance...

I'm not sure how I do it, once I see the size of group, I can move to a position without second thought or lift up the camera, which the widest angle of my lens able to cover.

maybe you just need more practice.

4. ## Re: Estimate the minimum distance...

Originally Posted by Rashkae
How good is your geometry and trigonometry?
http://en.wikipedia.org/wiki/Angle_o...angles_of_view

5. ## Re: Estimate the minimum distance...

Hahaha! That's cheating! They give you all the formulas!

6. ## Re: Estimate the minimum distance...

Originally Posted by Rashkae
Hahaha! That's cheating! They give you all the formulas!
Yeah, but still some triangles to calculate in order to get the distance as asked by TS.

7. ## Re: Estimate the minimum distance...

lolz... thank you guys.. I thought there is some kind of simple ''conversion'' about this. Lolz... now i think i just calculate that... I am comfortable with mathematics afterall. Thank you all.

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•