Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 11 Feb 2009 (Wednesday) 07:38
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Is there a formula?

 
Lenty007
Member
221 posts
Gallery: 5 photos
Likes: 21
Joined May 2006
Location: Ghent, Belgium
     
Feb 12, 2009 01:41 as a reply to  @ post 7308951 |  #31

All kidding aside, there are times when people or even you as well want to know how far something was taken from. Lets say in terms of telephotography.
There is actualy a simple formula that everyone can use to figure out the distance a photo was taken.
As an example we take a simple setup where a man is standing and photographed landscape with a 135mm lens on a full frame body.

The formula is DISTANCE equals HEIGHT(subject) devided bij the TANGENS of the VERTICAL OPTICAL ANGEL.

We know the persons height (1,8m)
We know the vertical optical angel (for a 135mm lens = 10° - see Canon documentation)
We know the tangens of this 10° (windows calculator says 0,176326981)
Sollution : 1,8 / 0,176326981 = 10,2 meter

So in order to have a standing man full frame on, lets say a 5d(II) body with a 135mm lens we need to be 10,2 meters away. As simple as that.

For a crop sensor you need to change the lens setting but the priciple is the same. The same thing for feet lovers.

Hope this is making any sense. Good luck and greetings from Ghent.

Alain,




  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
NewattheGame
Senior Member
Avatar
858 posts
Gallery: 1 photo
Likes: 5
Joined Feb 2007
Location: A Scot living in Philippines
     
Feb 12, 2009 01:59 |  #32

No no, who's on 2nd; he's on 3rd...


Always check the background first
flickr.com/photos/pete​ssnaps

  
  LOG IN TO REPLY
Mark1
Cream of the Crop
Avatar
6,725 posts
Likes: 6
Joined Feb 2008
Location: Maryland
     
Feb 12, 2009 07:53 |  #33

But it is only a fuzzy bunny!!!!!


www.darkslisemag.com (external link)

  
  LOG IN TO REPLY
songexe
Senior Member
Avatar
372 posts
Joined Jul 2008
Location: Ontario, Canada
     
Feb 12, 2009 08:35 |  #34

Quick! Alert the President!


Canon XSi | 18-55 IS | 85/1.8 | Manfrotto 790B

  
  LOG IN TO REPLY
NinetyEight
"Banned for life"
Avatar
3,193 posts
Gallery: 2 photos
Likes: 23
Joined Sep 2008
Location: Dorset - England
     
Feb 12, 2009 11:36 |  #35

I still want to know why :-)


Kev

  
  LOG IN TO REPLY
soxfan356
Member
Avatar
158 posts
Joined Jul 2008
Location: Chicago
     
Feb 12, 2009 11:43 |  #36

NinetyEight wrote in post #7311184 (external link)
I still want to know why :-)

He's in left


-Dan
Canon 40d, 28-135 IS, 70-300 IS, 100-400L IS, Sigma 10-20, 430exII
My Flickr (external link)

  
  LOG IN TO REPLY
Pmolan
THREAD ­ STARTER
Senior Member
521 posts
Joined Nov 2008
Location: New Jersey
     
Feb 12, 2009 13:33 |  #37

Lenty007 wrote in post #7309013 (external link)
All kidding aside, there are times when people or even you as well want to know how far something was taken from. Lets say in terms of telephotography.
There is actualy a simple formula that everyone can use to figure out the distance a photo was taken.
As an example we take a simple setup where a man is standing and photographed landscape with a 135mm lens on a full frame body.

The formula is DISTANCE equals HEIGHT(subject) devided bij the TANGENS of the VERTICAL OPTICAL ANGEL.

We know the persons height (1,8m)
We know the vertical optical angel (for a 135mm lens = 10° - see Canon documentation)
We know the tangens of this 10° (windows calculator says 0,176326981)
Sollution : 1,8 / 0,176326981 = 10,2 meter

So in order to have a standing man full frame on, lets say a 5d(II) body with a 135mm lens we need to be 10,2 meters away. As simple as that.

For a crop sensor you need to change the lens setting but the priciple is the same. The same thing for feet lovers.

Hope this is making any sense. Good luck and greetings from Ghent.

Alain,

edit


EOS 50D | 17-55 f/2.8 IS | 70-200 f/2.8 IS L | 100mm f/2.8 macro | 580EX | 430 EX | 430 EZ | Team Buff!!

  
  LOG IN TO REPLY
Lenty007
Member
221 posts
Gallery: 5 photos
Likes: 21
Joined May 2006
Location: Ghent, Belgium
     
Feb 13, 2009 00:02 as a reply to  @ Lenty007's post |  #38

No decaf for me please!




  
  LOG IN TO REPLY
x.pozhr
Goldmember
Avatar
4,789 posts
Gallery: 319 photos
Best ofs: 3
Likes: 748
Joined Oct 2007
Location: Chandler, Arizona
     
Feb 13, 2009 16:35 |  #39

number six wrote in post #7308833 (external link)
No ****, Sherlock!!!

Bet you weren't a math major.


flickr (external link)
Gear List + Marketplace Feedback

  
  LOG IN TO REPLY
number ­ six
"After 40 years still not housebroken, I still piddle on the carpet"
Avatar
8,941 posts
Likes: 70
Joined May 2007
Location: SF Bay Area
     
Feb 13, 2009 16:44 |  #40

pratman64 wrote in post #7319933 (external link)
Bet you weren't a math major.

Ummm, afraid I was. BA in math from CSUSF.  :p


"Be seeing you."
50D - 17-55 f/2.8 IS - 18-55 IS - 28-105 II USM - 60 f/2.8 macro - 70-200 f/4 L - Sigma flash
I do not piddle on the carpet!

  
  LOG IN TO REPLY
xarqi
Cream of the Crop
Avatar
10,435 posts
Likes: 1
Joined Oct 2005
Location: Aotearoa/New Zealand
     
Feb 13, 2009 17:24 |  #41

number six wrote in post #7319964 (external link)
Ummm, afraid I was. BA in math from CSUSF.  :p

Maths is an art in California? Over here it's a science! ;)




  
  LOG IN TO REPLY
songexe
Senior Member
Avatar
372 posts
Joined Jul 2008
Location: Ontario, Canada
     
Feb 13, 2009 17:25 |  #42

Over here, it's a...math.

Avoiding monkeys will probably solve your problem.


Canon XSi | 18-55 IS | 85/1.8 | Manfrotto 790B

  
  LOG IN TO REPLY
number ­ six
"After 40 years still not housebroken, I still piddle on the carpet"
Avatar
8,941 posts
Likes: 70
Joined May 2007
Location: SF Bay Area
     
Feb 13, 2009 17:53 |  #43

xarqi wrote in post #7320181 (external link)
Maths is an art in California? Over here it's a science! ;)

I, Sire, am an artiste! :lol::lol:

Nah, BA or BS was simply a matter of which elective courses I chose. I took some language, philosophy and lit electives so I got a BA. Took a semester longer than a BS, but I enjoyed it at the time...

-js


"Be seeing you."
50D - 17-55 f/2.8 IS - 18-55 IS - 28-105 II USM - 60 f/2.8 macro - 70-200 f/4 L - Sigma flash
I do not piddle on the carpet!

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

2,910 views & 0 likes for this thread
Is there a formula?
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is Paramveer
1841 guests, 302 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.