DPChallenge: A Digital Photography Contest You are not logged in. (log in or register

Threads will be shown in descending order for the remainder of this session. To permanently display posts in this order, adjust your preferences.
DPChallenge Forums >> Challenge Suggestions >> Golden triangles
Showing posts 1 - 8 of 8, descending (reverse)
05/06/2015 01:12:42 PM · #1
Sort of- they are based off of the phi number... Can't remember exact digits but 1.6 something.

The pentagram triangle is often used in drawing.
05/06/2015 12:48:03 PM · #2
The mathematic one is what makes the photographic one??? They are one in the same applied to photography???
05/06/2015 07:43:23 AM · #3
I was referring to the composition rule for photography, not the mathematic one.

It's like rule of thirds, but for images with a diagonal element. You frame up your subject either along one of the diagonals, or in one of the triangles.

Further, you can use it as a quick visual aid to figure out where the phi grid sweet spots are (or "golden rectangles").

I was thinking of the triangle for framing, though, as a challenge.

It is a composition technique I rarely use, just because rule of thirds is easier for me to visualize. But I want to improve at it. Thought perhaps, others would find it challenging as well.
05/06/2015 05:32:30 AM · #4
Originally posted by GeneralE:

Thanks! Is the sweet spot where the unencumbered dots are, the vertices, or somewhere else?

Typically, the composition will flow diagonally from corner-to-corner and there will be a second diagonal intersecting that at right angles, OR there will be a dominant diagonal with the subject protruding above/below that diagonal from one of the two intersection points. It's a pretty loose compositional guide, really; sometimes the diagonals are just implied.

Confusingly, there's an actual "golden triangle" which is an isosceles triangle whose base is half the length of its sides:

' . substr('//upload.wikimedia.org/wikipedia/commons/thumb/0/01/Golden_triangle.svg/192px-Golden_triangle.svg.png', strrpos('//upload.wikimedia.org/wikipedia/commons/thumb/0/01/Golden_triangle.svg/192px-Golden_triangle.svg.png', '/') + 1) . '

Note that this triangle is the implied isosceles triangle that repeats inside a pentagram, and gives us the geometry of DaVinci's famed "Vitruvian Man":

' . substr('//upload.wikimedia.org/wikipedia/commons/d/dc/Pentagram_and_human_body_(Agrippa).jpg', strrpos('//upload.wikimedia.org/wikipedia/commons/d/dc/Pentagram_and_human_body_(Agrippa).jpg', '/') + 1) . '

I'm not even sure which one the OP is suggesting we use...
05/05/2015 11:33:20 PM · #5
Thanks! Is the sweet spot where the unencumbered dots are, the vertices, or somewhere else?

Message edited by author 2015-05-05 23:33:55.
05/05/2015 10:55:44 PM · #6
Originally posted by GeneralE:

I know the "golden rectangle" version -- what "rule" is this one?

It's a diagonally-oriented composition built around golden section proportions:

' . substr('//www.picture-thoughts.com/photography/images/pt-golden-triangle02.jpg', strrpos('//www.picture-thoughts.com/photography/images/pt-golden-triangle02.jpg', '/') + 1) . '
05/05/2015 10:50:46 PM · #7
I know the "golden rectangle" version -- what "rule" is this one?
05/05/2015 10:37:33 PM · #8
Take a photo that uses this "golden rule" of composition.
Current Server Time: 11/24/2020 10:16:51 PM

Please log in or register to post to the forums.

Home - Challenges - Community - League - Photos - Cameras - Lenses - Learn - Prints! - Help - Terms of Use - Privacy - Top ^
DPChallenge, and website content and design, Copyright © 2001-2020 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Proudly hosted by Sargasso Networks. Current Server Time: 11/24/2020 10:16:51 PM EST.