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DPChallenge Forums >> Photography Discussion >> Guess the aperture - idea
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05/22/2007 12:46:42 AM · #1
Originally posted by Joey Lawrence:

Originally posted by goodman:



actually i didnt do much to this, dodge and burn and then i used
joey lawrence "pop the pill" which is like acid but less harsh.


In reality, it's really harsh acid when I pop the pill babay.


Yeah, been there, hope to never, ever,evereverever.... go back. ::shudder::
05/22/2007 12:38:59 AM · #2
Originally posted by goodman:



actually i didnt do much to this, dodge and burn and then i used
joey lawrence "pop the pill" which is like acid but less harsh.


In reality, it's really harsh acid when I pop the pill babay.
05/20/2007 01:58:21 AM · #3


actually i didnt do much to this, dodge and burn and then i used
joey lawrence "pop the pill" which is like acid but less harsh.

05/19/2007 08:49:40 PM · #4
Originally posted by Almilan:

Well, I sort of hoped this might have become a learning thread, as someone put it.

Learning how the controls on your camera affect photographs is always a good thing to experiment with. You will want to conduct real experiments to see the effects for yourself, of course.

Things to look for with aperture experiments:

1-For a given lens DOF will increase with higher f/numbers.

2-DOF is shallower for closer up objects than it is for objects further away.

3-Telephoto lenses have shallower DOF than other lens types

4-Wide angled and fisheye lenses have much wider DOF than other lens types and aperture changes have less effect with them since they have near infinite DOF already.

5-Macro lenses have the shallowest DOF of all because objects are so close to the lens; therefore, increasing the aperture number plays a more critical role when using them.
05/19/2007 07:42:15 PM · #5
Thanks for the tip wavelength - I'll have a go at what you suggest:)
05/19/2007 07:35:00 PM · #6
Originally posted by Almilan:

Well, I sort of hoped this might have become a learning thread, as someone put it. I think I was wrong, apart from those of you who gave more detailed explanations of all things which can have an effect on dof. These explanations were useful - thanks to those of you who gave them:-)

I guess I just wanted to know how easy or not it is to understand the aperture someone used to make a capture - so I can understand how different apertures affect photographs.

Anyway, I'm going to experiment to see how much changing f stop etc can change a shot. This is one of many things I want to understand better.

Although I have a few books on photography, I had not really grasped how apertures affect images. Thanks to this site and the www, I now understand things better.

Did anyone else find this thread potentially useful?


As a thinking exercise, and bacause of seeing Les's original I did.

For an experiment, you can try something like setting up a bunch of crayons in a row extneding away from your camera, with most of them in frame. So, if you were looking at it from the top, they would be a 45degree diagonal from one side of the camera leading away.

Keep the lighting as steady as you can, and take several shots with the f/ incrementing up from 2.8 to the minimum (highest number). You'll see a marked difference in the DOF, but at some point the DOF will stabilize and no more will be in focus. You might notice that you'll lose a bit of sharpness at the smallest apertures, much due to diffraction and other things I haven't taken the time to understand.

Try the same at different focal lengths as that will change your DOF also.
05/19/2007 06:39:59 PM · #7
Well, I sort of hoped this might have become a learning thread, as someone put it. I think I was wrong, apart from those of you who gave more detailed explanations of all things which can have an effect on dof. These explanations were useful - thanks to those of you who gave them:-)

I guess I just wanted to know how easy or not it is to understand the aperture someone used to make a capture - so I can understand how different apertures affect photographs.

Anyway, I'm going to experiment to see how much changing f stop etc can change a shot. This is one of many things I want to understand better.

Although I have a few books on photography, I had not really grasped how apertures affect images. Thanks to this site and the www, I now understand things better.

Did anyone else find this thread potentially useful?

05/19/2007 06:02:28 PM · #8
Originally posted by Almilan:

ok, ok, I get the message. Maybe this was a stoopid idea of mine.

Shall crawl back under my stone.....until my next brainwave.

165lbs ;-)


Just call me fatty :(
05/19/2007 06:02:05 PM · #9
Originally posted by Almilan:

ok, ok, I get the message. Maybe this was a stoopid idea of mine.


It wasn't a stooopid idea. It just didn't work because we don't have enough info to make a really good guess.

Out of all of us, I think only kirbic could actually do the math. :-)
05/19/2007 06:00:05 PM · #10
ok, ok, I get the message. Maybe this was a stoopid idea of mine.

Shall crawl back under my stone.....until my next brainwave.

165lbs ;-)

05/19/2007 05:53:53 PM · #11
I fear I will soon have to ignore this thread.. sigh
05/19/2007 05:50:20 PM · #12
Originally posted by fotomann_forever:

Originally posted by sabphoto:


5'6 huh...I say 150 max


close enough, 148 w/o cheese :-D


ugh, I got on the scale the other day and I weigh 202, but I'm 6'2"
05/19/2007 05:20:51 PM · #13
Originally posted by sabphoto:


5'6 huh...I say 150 max


close enough, 148 w/o cheese :-D

Message edited by author 2007-05-19 17:21:07.
05/19/2007 05:19:42 PM · #14
Originally posted by fotomann_forever:

Originally posted by RainMotorsports:

Originally posted by Brad:

173.8lbs


I weigh a 177 pounds and am a hell of alot thinner then leroy lol.


Think again :-P

Add a crucial piece of info. I'm 5'6


again I think we need more info.

are you holding any cheese? lol

5'6 huh...I say 150 max
05/19/2007 04:46:49 PM · #15
Originally posted by RainMotorsports:

Originally posted by Brad:

173.8lbs


I weigh a 177 pounds and am a hell of alot thinner then leroy lol.


Think again :-P

Add a crucial piece of info. I'm 5'6
05/19/2007 04:45:48 PM · #16
Originally posted by Brad:

79kg x 2.2 - 173.8lbs
He's cut shed a lot of cheese with his new diet.


Lower ...
05/19/2007 04:43:36 PM · #17
Originally posted by fotomann_forever:

LOL, what a funny thread :-) Can we play guess my weight next?


188 pounds

05/19/2007 03:38:30 PM · #18
79kg x 2.2 - 173.8lbs
He's cut shed a lot of cheese with his new diet.
05/19/2007 03:30:46 PM · #19
Originally posted by Brad:

173.8lbs


I weigh a 177 pounds and am a hell of alot thinner then leroy lol.
05/19/2007 03:29:43 PM · #20
173.8lbs
05/19/2007 03:28:47 PM · #21
LOL, what a funny thread :-) Can we play guess my weight next?

umm 79kgs?

i think its a fun thread
05/19/2007 03:26:40 PM · #22
I tell you what this thread is the worse idea ever.
05/19/2007 03:25:47 PM · #23
trick :)



(I had been shooting low-light in manual exposure mode
the night before and forgot to reset my camera,
but because I was shooting in RAW, I was able to save it)
05/19/2007 02:56:53 PM · #24
I guess we could play guess your weight Fotoman, but it won't help me take better pics ;-)

So, what do we need to help us guess the f?

Lens length, camera, and shutter speed. And, I if the pic has been cropped.

So I'm learning about all the things that influence dof. Interesting.
05/19/2007 02:52:54 PM · #25
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