xpatUSA

xpatUSA

Lives in United States Bellville, TX, United States
Works as a Retired Engineer
Has a website at kronometric.org
Joined on Dec 15, 2011
About me:

Interested in Foveon technology but am no photographer.

xpatUSA's recent activity

  • Plot Profiles can be quite revealing! The effect of the "shutter shock" at 1/5 sec appears to be a BIG reduction in micro-contrast, both horizontally and vertically . After reading this "The ...
  • Interesting, Macrero and Paul: - especially choice of shutter speed and mounting equipment! Sad to note that my Giottos "Silk Road" 1" carbon fiber tripod with their medium ball-head and QD-plate ...
  • Perhaps you had a fast computer back then ... Under Windows XP, single-core HP, I clearly remember a low-res image being shown briefly while the raw conversion takes place, both for the SD10 and ...
  • Replied in All change
    I am reminded of over 30-odd years ago when my then  company, Ruston Gas Turbines Ltd., bid to supply engines for what what was called the "APT" (Advanced Passenger Train). Engines were to be 1200 ...
  • Excellent question! After all, this subject has been beaten to death for the past several years!
  • Replied in Green
    Thanks for sharing you choice of color rendition, Mike. Very tastily done, dare I say "filmy"? Thanks also for the lighting info.
  • Replied in Green
    AUTO WB ... interesting! What lighting?
  • Did you set the moon to "new moon" and the f-number to 6.3, as in Steve's OP? It STILL says 7 MINUTES shutter speed, unless you didn't bother to set those ...
  • mea culpa ; bad link for the calculator, try this one: http://xjubier.free.fr/en/site_pages/astronomy/MoonExposureCalculator.html The WikiPedia page that comes up is just tables, not a calculator. ...
  • Brave shot, Steve! I do a few of those myself ... ;-) Out of curiosity, a calculator here gives a shutter time of 7 minutes for the new moon (bracketing recommended). There's some moon exposure bri ...
  • As I recall, my x530's Ricoh lens did not misalign itself within it's 3X optical zoom range, even though the body was hand-crafted in a far, far off land: https://cameralegend.com/tag/polaroid-x530 ...
  • Found this today, Jan ... https://discuss.pixls.us/t/what-is-your-technique-to-greatly-darken-the-sky/7561
  • The difficulty with the claimed numbers is that they represent scenes lighter than "at night" - more like twilight ... It comes as no surprise therefore that such scenes are quite shootable with ...
  • Caveat (non-sequitur): The DP1s has the TRUEII processor, the SD14 does not. [edit] not sure why I wrote that ... please ignore. :-(
  • Each to his own in the world of superlatives, I reckon. I tend to use "impressive" along with a qualifier to indicate the degree, e.g. "quite impressed". Good. The less done, the more we know about ...
  • I hate the word but I am also "stunned", Henrik. If that were my kind of work, I would be sorely tempted! Well done,
  • Back to Basic Processing, Gary. The above aren't much different. For the circling sharks, I'll speculate that the 850 captures less bandwith (nm) in the blue areas of the scene - meaning less ...
  • +1 to the GIMP. Elle Stone has been out with a 16-bit version for a while and does know a bit, for example: https://ninedegreesbelow.com/photography/high-bit-depth-gimp-tutorial-edit-tonality-color ...
  • With the 850nm on an SD14 I found the raw black level quit high (in RawDigger). Your top row images tell a similar tale: Where this effect comes from I have no I idea. I do understand from Other ...
  • Replied in ISO 1600 test
    Of course they do ... However, in the Real World, they look quit different under the magnifying glass:
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Total messages 11802
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Last post 2 months ago
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Last entry Aug 11, 2014
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Last upload Aug 11, 2014