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Thread started 16 May 2004 (Sunday) 01:43
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Dandelion DoF?

 
martcol
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May 16, 2004 01:43 |  #1

I thought that f9.0 would have been plenty to get this sharp. Am I wrong (well obviously - but whadayathink?)

ISO 200, 1/100, f9.0, 24-70 at 70 mm

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http://images.fotopic.​net/?id=4483251

Martin

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LightHunter
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May 16, 2004 05:52 |  #2

Very special. Is this a frozen or humid dandelion?




  
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PhotosGuy
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May 16, 2004 09:12 |  #3

If something in the pic is sharp, then that’s good enough for me! Try not to fall into the “L-trap†where everything must be needle sharp! (Man…, I’m going to catch it for that!)
:lol:
DOF & focus are just tools, like any other. See my posts on “Dandy Lions†for some examples. More coming when I get the time to convert them.
I like it if the center drops are sharp somewhere… it’s hard to tell in the small pic.


FrankC - 20D, RAW, Manual everything...
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martcol
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May 21, 2004 11:57 |  #4

Hmmmm

Maybe I am caught in the "L trap." But anyway, what I wanted was a dof greater than this. It was a dew soaked dandelion on a bright spring morning. I hadn't actually expected the efect I got. Those droplets are utterly miniscule. I would have liked a degree of sharpness slightly greater than I got.

Martin


"All photographs are accurate. None of them is the truth."
Richard Avedon
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PhotosGuy
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May 21, 2004 18:02 |  #5

You said "morning", so I figured that there wasn't any wind - but how about camera movement forward & back? This would throw off your exact focus point @ f-9. I've found that to be true for me. The DOFocus is about this >< wide. Once you're set up with general focal length, aperature & focus, etc, it's best to focus by moving toward & back from the subject - don't screw around with changing @ the lens if you're in MF which I usually use. If AF, then you lock it when you depress the shutter button, but that doesn't mean that you don't have time to move before it goes off!
On something like that, I'd take 5-10 shots just to cover the fact that I know I can't hold it THAT steady to maintain focus when I'm changing the pressure that I'm putting on the cam to press the shutter.
Options:
Use a Tripod.
Shoot when the wind isn't blowing.
Go up to f-16.

And, have fun! :wink:


FrankC - 20D, RAW, Manual everything...
Classic Carz, Racing, Air Show, Flowers.
Find the light... A few Car Lighting Tips, and MOVE YOUR FEET!
Have you thought about making your own book? // Need an exposure crutch?
New Image Size Limits: Image must not exceed 1600 pixels on any side.

  
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Volatile
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May 21, 2004 21:58 |  #6

I like how the dark corners give the impression of vignetting but it's actually the edges of the little ball.


Bill
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Dandelion DoF?
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