Serene Life

by garik

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54,319 reputation
7106248
bio website jonrista.com
location Aurora, CO
age 34
visits member for 4 years, 3 months
seen 16 hours ago

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

May
29
comment Where can one find Canon printer icc profiles?
I've actually been trying to sell my DataColor Spyder Pro package, which includes the screen, print, and camera calibration tools. Darn good deal, if your interested. ;P
May
29
comment Where can one find Canon printer icc profiles?
Ah. In the case of the MG line, I don't think Canon has ever produced ICC profiles. I know they had them for the PIXMA Pro9000 and Pro9500 lines, and the new Pro 1/10/100, but beyond that, I'm not sure that Canon has ever created ICC profiles for their other printers. Most third-party paper manufacturers don't create ICC profiles for anything else either. Your pretty much on your own in that case, in which case a SpyderPRINT as in AJ's answer is probably a worthwhile tool.
May
29
comment Where can one find Canon printer icc profiles?
Do you mean these? Canon ICC profiles. If your on Linux, I'd guess the Mac ones should work. There should be profiles for each Canon paper type. Normally these are installed with the drivers, and on windows they can be exported, so if these links don't get what you need, I may be able to provide you with .icc files for the necessary paper types.
May
29
comment Setting white balance for raw image from Canon S100 using Lighroom failed to work well
...the default Adobe camera profile. Personally I use the Canon Standard or Neutral profile, which doesn't really mess with color or anything else in any way, then achieve the color and tone I want on my own with all of LR's other tools. It's also possible to edit one RAW image, then save those settings as an auto-apply profile for a given camera model, ISO setting and even serial number. That way, every time you import, your photos get the default settings YOU want, which can save you a lot of time in the long run.
May
29
comment Setting white balance for raw image from Canon S100 using Lighroom failed to work well
@Paul: There really is no such thing as accurate or better or more correct when it comes to photography. Aesthetic appeal is 100% a human thing. You need to choose what style appeals to you, and in all honesty, I'd be willing to bet that the OOC JPEG quality is not the best possible option. Also, keep in mind, there are multiple camera profiles in LR. It's the last panel in develop. By default, Adobe's own profile is used, but replications of all of Canon's profiles are there. Pick one, and you'll probably get MUCH closer to Canon's output. It won't match 100%, but it will be closer than...
May
28
comment What's the difference between colour space and bit depth?
Using Matt's example colors, it would probably end up bright yellow (255,255,0), since that is the closest viable option. If you mean (255,0,0) then it would end up orange. There are various rendering intents that can be used when mapping numeric color values to color-space coordinates: Absolute, Relative, Saturation, Perceptual. Depending on the intent, the exact color outcome (the "rendered" color) will be slightly (or maybe wildly, really depends on the color space and ICC profile) different.
May
28
comment Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)
Aye, linear magnification is the same as the ratio of focal length.
May
28
comment Setting white balance for raw image from Canon S100 using Lighroom failed to work well
The reason your RAW image looks different is Lightroom uses Adobes algorithms, where as the OOC JPEG uses Canon's algorithms. The two are not the same. Canon publishes all the details about how to replicate their tone curves, white balance, etc. but Adobe chose to build their own system from the ground up (necessary, since they have to support hundreds of cameras in Lightroom). You can't expect LR to produce identical results to OOC JPEG images because of these algorithmic differences. They will be close, but not identical.
May
28
comment What's the difference between colour space and bit depth?
From a numeric standpoint, yes. From a rendering standpoint, it depends on the color space. ;)
May
28
comment Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)
The subject area increases by 2.25x (600mm shrinks the FoV in both width AND height), linear scaling is 1.5x. Think about it, though...the increase in area is more relevant, as it means you have that many more pixels on your subject. Pixels on subject is really where IQ comes from...the more pixels you can get on your subject, the sharper, less noisy, etc. for any given output magnification.
May
27
answered Why image at 400mm is LARGER THAN DOUBLE of image at 200mm? (according to lens formula)
May
27
answered Setting white balance for raw image from Canon S100 using Lighroom failed to work well
May
27
comment What's the difference between colour space and bit depth?
@Jason: The term "extent" works for three-dimensional spatial objects. It does not mean just a two-dimensional extent such as a triangle superimposed on top of the full brightness/saturation plot of Lab space. Extent means the entire extent of the color space, in all three dimensions, regardless of the actual shape that extent takes. I'd also state that sRGB, AdobeRGB, etc. are color spaces, while RGB, YUV, HSL, CMYK, etc. are color models, not color spaces. Color spaces ARE 3D, but generally they have odd mushed diamond shapes, they are never cylindrical or cubic.
May
26
comment Human perception in color mixing
Aye, you can perform gamma-adjusted blending, however I am not sure that really takes into account the differences in the way human vision "averages" or "interpolates" information. Gamma-adjusted algorithms simply aim to work within the specs of the device, but they are still the same fundamental algorithms.
May
26
comment Is the format for the distortion and chromatic aberration correction of µ4/3 lenses documented?
@bronger: And I quote the OP: Is this format documented anywhere (either officially **or through reverse-engineering**)? The OP specifically stated that reverse-engineering was a perfectly viable option, so I still fail to see why your making your argument, and still believe your downvote was unwarranted.
May
26
comment Human perception in color mixing
@tomp: I'm sure some research has been done. I know that tools like Photoshop, as well as more specialized tools like PixInsight (astrophotography editing tool) allow a considerable amount of their algorithms to be executed within Lab space. Someone must have researched the hows and whys to be able to make that possible.
May
26
comment What's the difference between colour space and bit depth?
@BBking: That isn't quite correct. The two are not linked in that way. The building size doesn't have to change if you move to 16 steps, because you can make the steps be closer together than when you have only 8 steps. Bit depth is the closeness of the steps, while color space is the size of the building. I've added an answer that may help.
May
26
answered What's the difference between colour space and bit depth?
May
26
comment Human perception in color mixing
There is research in this area, from the standpoint of the human perception of color. That's all of CIE's work. There are decades of studies and mathematical modeling and refinement of models in CIE's body of work that covers human visual perception in quite a bit of detail. There is also some fairly extensive study of human color perception by other bodies as well, from medical institutions to universities. In terms of matching human visual perception to computer color models, some work has been done (i.e. RGB->XYZ->Lab transforms), but I myself kind of threaded the pieces together here.
May
25
comment UV Filter Coating
If it's dust on the filter, I'd just clean the filter. Pick up a pack of kimwipes and a soft brush (either camel hair or something synthetic like a lens pen). Brush off the filter, clean it with the kimwipe (dry, they work like magic, and don't worry about the rough feel, it's by design and WHY they work so well.) If that does not fix the problem, then it's probably a nick in the glass or coating, and you'll probably need to replace the filter to get rid of the problem.