knickerhawk

knickerhawk

Lives in United States United States
Joined on Jul 22, 2004

knickerhawk's recent activity

  • Replied in Magic lantern?
    Some Canon users ahve installed the Magic Lantern firmware that supports raw histogram/ETTR readouts.  I believe it may be available for the EOS M.  I'm not a Canon user myself so I can't really ...
  • OK, lets see if it's borne out "in practice" as you say.  Would you say the left or the right image below has the better SNR? Click to view the original magnified versions Next, please order the ...
  • Correct.  WB is applied during the demosaicing stage of raw processing.  It is not cooked into the RAW file. Rawdigger certainly would demonstrate this (I recommend you install it and learn to use ...
  • Replied in Exposure comp
    Let's start at the beginning.  What do you think is supposed to happen when you make an exposure comp adjustment?
  • Good point, but the angle of each sagittal sample differs and the angle between each meridional sample differs, so it's hard to factor in any expected difference!  A minor consideration in ...
  • Also note that the target used was created by gluing cutouts from another chart.  The angles of the converging lines used for the tangential/meridional and sagittal/radial cropped samples are NOT ...
  • The "perfect" focal reducer I'm referring to is the real (prototype) that Caldwell and Ciccala tested at LensRentals.  It isn't 2x, so it's not "perfect" in that sense of the term and doesn't ...
  • I'm not sure what it means to say that changing the money variable "widens the resolution gap between the formats" in favor of the larger format. Utilization of a "perfect" focal reducer (for ...
  • The kind of simplistic "tolerance" scaling that Pete was referring to should have a devastating impact on typical microscope objectives resulting in either very poor resolution or very expensive ...
  • Thanks for the in-depth respoonse. The point about stability makes sense.  However, I don't think you directly answered my question about stitched shots.  How practical is it to rotate precisely ...
  • So your tolerance "fail" argument somehow doesn't apply to macro lenses? Odd... You're dodging the question.  Your tolerance "fail" hypothesis implies that the tiny lenses used in microscope optics ...
  • Pete, why are the best microscope optics so small?  If your scaling hypothesis were correct you'd expect companies like Olympus and Leica to make much larger microscopic lenses than they do.
  • Or better yet, microscope lenses must really be horrible... http://www.leica-microsystems.com/products/microscope-objectives/
  • Perhaps the OP will return and reply in more detail.  Until then, you might find his explanation here to be helpful.
  • Is that based on personal experience with a drone?  Please elaborate.  I've seen drones fly up close and they seem capable of rather precise movements but I have no direct experience taking ...
  • I would assume so as well, but I'd still be interested in his response about the option of stitching multiple shots obtained from a drone.  I get the fun/hobby aspects of operating ...
  • Nice shots, but why the need for that particular body+lens combination (and hence the need for a big drone)?  You noted elsewhere that the whole rig weighed around 13 kgs and cost in excess of ...
  • Replied in I agree, Ken
    Yes, I am always looking for blue sky noise issues with my EM5 because I know it's prone to showing up as a problem if I don't/can't ETTR sufficiently. In fact, it's not just "sky" that creates ...
  • Replied in I agree, Ken
    Bob's speculation strikes me as being pretty implausible. As an EM5 owner/user, I've never noticed any correlation between atmospheric conditions and when the so-called blue sky noise appears. On ...
  • What a location! I was just there in early October.  What I didn't realize (and did not plan for with the right lenses) was that my visit coincided with the blood moon.  Truly a once-in-a-lifetime ...
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