# Estimate the minimum distance...

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#### HuguKYM

##### New Member
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).

#### Rashkae

##### Senior Member
How good is your geometry and trigonometry?

#### catchlights

##### Moderator
Staff member
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.

#### Rashkae

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

#### Octarine

##### Moderator
Staff member
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.

#### HuguKYM

##### New Member
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.

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