It's a bird

by Vian Esterhuizen

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56,374 reputation
8115261
bio website jonrista.com
location Aurora, CO
age 35
visits member for 4 years, 11 months
seen yesterday

I am a relatively new photographer, having been at if for only a few years. I chose Canon gear when I finally took the plunge into DSLR. I am an avid hobbyist now, and love everything about photography, from the gear, to the science, to the art. I spent years reading about the technology and photography theory, so I am very well versed in the technical aspects of photography. My artistic skills are moderate, but improving. You can see my work @ the following sites:

My interests lie primarily in nature photography:

  • Birds
    • Songbird Setups
    • Shore Birds & Waders
    • Raptors
    • All others
  • Astrophotography
    • Moon
    • Wide Field
    • Deep Sky
  • Landscapes
  • Wildlife
  • Floral Macro
  • Insect Macro
  • Abstract

I currently use the following gear:

  • Cameras
    • Canon EOS 7D
    • Canon EOS 450D (Rebel XSi)
  • Lenses
    • EF 16-35 f/2.8 USM L Wide
    • EF 50mm f/1.4 USM
    • EF 100mm f/2.8 USM Macro
    • EF 100-400mm f/3.5-5.6 IS USM L Zoom
    • EF 600mm f/4 L IS II
    • Canon EF 1.4x TC III
    • Kenko 1.4x Teleplus Pro 300 DGX
    • Periodic Rentals:
      • EF 300mm f/2.8 L IS II
      • EF 500mm f/4 L IS II
      • Canon EF 2x TC III
  • Filters
    • Lee Foundation Kit (x2) + Tandem Adapter
    • Lee .3/.6 ND
    • Lee .3/.6/.9 Soft Grad ND
    • Lee .3/.6/.9 Hard Grad ND
    • Lee CPL
  • Tripod
    • Gitzo Systematic GT3532LS 3S. Series 3 Tripod
    • Jobu Pro 2 Gimbal
    • Gitzo Mountaineer GT0541 4S. Series.0 Tripod
    • Gitzo GH1780QR Series.1 Mag. Center Ball Head

Oct
18
comment Is there always a way to capture all the light ranges to get good HDR images?
You can read more about the specifics at this link: tawbaware.com/tufuse.htm. There is a link to the original paper on Exposure Fusion in there as well, which describes the theory and algorithm in depth.
Oct
18
comment Is there always a way to capture all the light ranges to get good HDR images?
Exposure Fusion is an entirely new way of merging images. Outside of the need for multiple exposures, the similarities stop there. HDR merges images into a 32bit floating point high dynamic range image, while exposure fusion selectively chooses tones from your image set and merges them into a normal 8bit image via a special algorithm. Photomatix supports both HDR and Exposure Fusion, but they are not the same thing...an enfused image is not HDR, its LDR.
Oct
18
comment Is there always a way to capture all the light ranges to get good HDR images?
The tonal range of an 8-bit image is about 256 levels. The tonal range of a 12-bit RAW is about 4096, 14-bit RAW is 16385, 16-bit RAW is 65536 discreet tonal levels. In contrast, a 32bit float HDR image supports truly "dynamic" tonal range. Since there is one 32bit floating point number for each color component, you are not limited to representing color brightness with discreet integer values. The HDR tonal range extends from pitch black (0.0), through dim starlight (0.00001), indoor lighting (100), outdoor shade (1000-10000), outdoor sunlight (1000000), the sun (1000000000) and beyond.
Oct
18
comment Is there always a way to capture all the light ranges to get good HDR images?
Well, were not really talking colors, were talking tones. The number of "colors" that are representable by any color model, for 8bit, 16bit, or 32bit float, is about the same. There are two major modes of thought, but science shows that humans can only really see about 2-3 million (by one school of thought) to about 10 million (by another school of thought). On the other hand, the human eye is far more sensitive to different tones. It is not infinitely sensitive, but we are able to differentiate a pretty fine degree of tonal differences. HDR expands tonal range much more than color.
Oct
18
comment Where can I find comparisons for linear polarizers (for a cheap variable ND filter)?
I thought the problems with linear polarizers had to do with the meter, and whether it was beam splitting. From what I understand, beam-splitting meters also polarize the light, which would double-polarize if you used a linear polarizer, and give you incorrect meter readings.
Oct
18
answered Is there always a way to capture all the light ranges to get good HDR images?
Oct
17
comment Any good alternatives to Lightroom for PC users?
Sorry, Paint.NET is an ok image editing program, but not really tool to do any kind of photography work with. It doesn't offer any kind of organizing/tagging, and outside of some very basic editing tools, does not really provide anything to effectively fine-tune and fix photographs (outside of its curves tool.)
Oct
17
answered Any good alternatives to Lightroom for PC users?
Oct
17
comment How do I generate high quality prints with an ink jet printer?
@labnut: I've actually done some tests, which will be the basis of the next Emperical Study. For certain types of photos, where fine detail is prevalent, 600ppi (or 720ppi on Epsons) does indeed matter. The moth used in the Extreme Upscaling study has some very fine detail in its eyes. Printing @ 300ppi vs. 600ppi shows a marked difference in the clarity of those details. On the flip side, if your photograph does not have such details, 300ppi is generally plenty.
Oct
17
awarded  Nice Question
Oct
17
revised How do I generate high quality prints with an ink jet printer?
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Oct
17
comment Why does viewfinder spec state 3 times more dots than there are pixels?
Thank you! I knew the word "equiv" in their description meant something quite specific, and very misleading.
Oct
16
revised Why does viewfinder spec state 3 times more dots than there are pixels?
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Oct
16
revised Why does viewfinder spec state 3 times more dots than there are pixels?
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Oct
16
answered Why does viewfinder spec state 3 times more dots than there are pixels?
Oct
16
comment Decrypting Canon's Nomenclature Of Cameras
@Winston: Glad to be of service. :)
Oct
15
answered Is there a Canon equivalent of the Nikon D3100? If so, what is it?
Oct
15
comment When do the differences between APS-C and full frame sensors matter, and why?
The viewfinder on the 7D is a 1:1/100% viewfinder, however since that is an APS-C sensor, it is smaller than the 5D's. The 7D's finder has some pretty advanced active display stuff since it uses an LCD to display information across the whole surface of the viewfinder.
Oct
15
revised How do I generate high quality prints with an ink jet printer?
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Oct
15
revised How do I generate high quality prints with an ink jet printer?
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