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Author Topic: New found winter passion  (Read 15600 times)

DanPBrown

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New found winter passion
« Reply #20 on: March 01, 2009, 04:21:32 PM »

Thanks for the input Jack and Ron. Here is another but in color.
Dan
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Mitchell Baum

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« Reply #21 on: March 02, 2009, 07:37:57 PM »

Dan,

These are great. I like all three, black, white and color, but I get a greater feeling of detail which really takes me into the image with the black background. I wonder if there's a middle ground, or some soft light from the side.

I'm curious about the focus blending. Is this for dof? I would have thought this was flat 2 dimensions. What am I missing?

Great job.

Best,

Mitchell
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Peter McLennan

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« Reply #22 on: March 02, 2009, 08:38:47 PM »

I vote Woody Woodpecker.  
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DanPBrown

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« Reply #23 on: March 02, 2009, 08:54:29 PM »

Quote from: Mitchell Baum
Dan,

These are great. I like all three, black, white and color, but I get a greater feeling of detail which really takes me into the image with the black background. I wonder if there's a middle ground, or some soft light from the side.

I'm curious about the focus blending. Is this for dof? I would have thought this was flat 2 dimensions. What am I missing?

Great job.

Best,

Mitchell
Well it's a bit more complicated than that. First these patches of frost are very small, from 1 to 4 centimeters. At that size dof is very thin. Couple that with me shooting at f/5.6 and the dof is very very thin. Now you don't have to shoot at 5.6 but you need to realize that I'm a bit obsessive when it comes image quality. The effective aperture at 1:1 magnification when shot at 5.6 is f/11. At f/11 my ability to resolve fine detail is already diffraction limited. Any wider than 5.6 on my 65mpe and optical shortcomings reduce image quality. I'm trying to extract as much image quality from these shots as possible in order to make large prints.
Second, it's very difficult for me, when freezing my butt off, to get the camera perfectly square with the glass pane.  
Third, the plane of focus projected by the lens is not perfectly flat.
And last, the frost is actually somewhat 3d. There are crystals that grow away from the glass and require many shots to fully capture.
Here is a photo that shows some crystals growing away from the glass.
Dan
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DanPBrown

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« Reply #24 on: March 02, 2009, 09:06:08 PM »

Quote from: Peter McLennan
I vote Woody Woodpecker.  
Lol, here is one that looks just like an angler fish. In case you don't know what an angler fish looks like look here,
http://www.dangerouswildlife.com/images/anglerfish.jpg
Dan
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Mitchell Baum

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« Reply #25 on: March 03, 2009, 11:27:09 AM »

Dan,

Thanks for the explanation. I didn't realize how small the crystals were! Everything makes sense to me now that I have the size right. Living in Maine, I hear you about the cold.

A lot of effort, but a very worthwhile result.

Best,

Mitchell
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DanPBrown

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« Reply #26 on: March 08, 2009, 09:48:22 AM »

I got lucky a few days ago when the temperature dipped below 10 fahrenheit. I was able to capture this patch of frost.

The frost patch is about the size of a half dollar. This photo is stitched and focus blended, it took me 5 hours to complete yesterday. The final image is 44 megapixels.
Dan
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Peter McLennan

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« Reply #27 on: March 08, 2009, 02:19:26 PM »

Gorgeous, Dan.  I had no idea you had such DOF problems to contend with. Worth you freezing your butt off.  At least from here it is.    

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stephent

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« Reply #28 on: March 10, 2009, 11:07:29 PM »

These are spectacular - the black background is the most impactful for me. Funny you should mention the anglerfish look-a-like - just before I read that I was thinking that the images reminded me of some marine organisms like diatoms. Great stuff!

Stephen

tsjanik

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« Reply #29 on: March 11, 2009, 09:33:59 PM »

Hi Dan:

I just read this thread.  Great photos and by coincidence, I have been admiring the frost patterns on my porch.  I have added one of my own and I note with interest that the structure of the ice is similar to that in yours. I was wondering if the particular nature of the surface of my windows led to the patterns apparently not.

Tom  
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DanPBrown

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« Reply #30 on: March 12, 2009, 07:33:25 AM »

Quote from: tsjanik
Hi Dan:

I just read this thread.  Great photos and by coincidence, I have been admiring the frost patterns on my porch.  I have added one of my own and I note with interest that the structure of the ice is similar to that in yours. I was wondering if the particular nature of the surface of my windows led to the patterns apparently not.

Tom
Nice shot and very similar. My car had some great frost on the outside of the windows yesterday, unfortunately I didn't have time to take any shots.
Dan
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Jerry Basierbe

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« Reply #31 on: April 01, 2009, 08:14:32 AM »

Dan,
I like them all. Great job!

Jerry
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