AKRover

Lives in United States Anchorage, United States
Joined on Sep 30, 2006

AKRover's recent activity

  • Here is some of what I don’t know (the complete list appears to be endless). I don’t know anything about the velocity profiles of mechanical shutter curtains. I don’t know the distance between the ...
  • I had been meaning to advance my understanding of mechanical shutter mechanism design so I took your question as an opportunity to research a little more. There doesn’t seem to be much detailed ...
  • Replied in question...
    Yes, exactly.  Thanks, the suggestion is a good one, provided it doesn't cause me to fall down the stairs if I get up from my computer without remembering to change my glasses.  It will be a topic ...
  • Replied in question...
    Viewing distance is really important. The monitor is never too big nor too small; you merely are sitting too close or too far. For older people with complex close vision like me, it is a lot more ...
  • I was actually just working on this before lunch.  I just downloaded 4.15.20 and played around with some color swatches in a jpeg I made in MS Paint and the brightness slider in DPP (under tone ...
  • Submitted a challenge entry Not all heroes wear capes
    Rangers at Parc National D'Odzala are transported toward home after spending days patrolling the jungle to prevent poaching of the critically endangered forest elephant
    Placed 6th in the challenge. Rangers at Parc National D'Odzala are transported toward home after spending days patrolling the jungle to prevent poaching of the critically endangered forest elephant
  • One contributing factor in your 100% viewing condition is that the M6II resolution is generally considered high enough to show diffractive blurring by about f/6.3. At f/8, diffraction is certainly ...
  • My guess is that you are shooting in an automatic mode and when you shoot a bright sky, the camera tries to choose a smaller aperture.  When you don't include the sky, the camera is choosing to ...
  • There was a recent thread in the science and technology forum with the exact same pattern: What is the source of optics-dependent spatial patterns in measured digital camera noise?: Photographic ...
  • If you use fast lenses and fast shutter speeds, EFCS will give you weird effects when using manual lenses. The exposure will vary across the frame. We don’t see that with fast electronic EF or EFM ...
  • My Vizio 4K TV flickers at 480hz. Not only can I measure electronic shutter modes, but I can get reasonably accurate mechanical shutter transit times. My M6II electronic shutter is 47ms (1/21 ...
  • My bird setup is the 400 DO II with a 1.4X on M6II. In my opinion, for my mobile approach to bird photography, this is the best setup currently on the market at any price. I own a 5D3 and an 80D, ...
  • Replied in Another clue?
    The one thing that has guided my journey through the technical side of photography is never-ending curiosity. There are times like this where I have to admit that I don’t have the answer and that ...
  • Replied in Another clue?
    The learning experience for me in following this was the effect of a teleconvertor on pupil magnification .  When I read that in bclaff's first response, the algebra, perhaps wrong, jumped out at ...
  • Replied in Another clue?
    I have read your posts here and in the macro forum several times trying to make sure I understand your data. I don’t use teleconvertors with macro lenses often, but I noticed something very ...
  • Yes, but there is one little catch, the effects of cropping on noise, diffraction, and DOF. Those three can easily be understood by equivalent f-number which means your 70f/2.8 cropped is ...
  • Not all distortion looks the same.  I lived on a wetlands and at times, it was simply impossible to get a clear shot of birds flying over.  There was no shimmer, just a general degradation.  I saw ...
  • Created discussion thread UURig cage on my M6II
    There are three reasons I put a cage on my M6II. The most important one is protection. The rubber grip on my M6II has taken a real beating over the last year and this will protect not only the ...
  • Replied in IBIS vs EFCS
    You have made three mistakes in your analysis. One, you are confusing frequency with velocity. Stabilization is designed for the former not the latter. Two, when you start working with frequency ...
  • I am not sure of your artistic goals, and perhaps your goals are really more scientific, but one of the inherent problems of full rings is the lack of shadow control. Rings in macro tend to ...
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Total messages 282
Threads started 13
Last post 5 days ago
Total comments 0
Total likes 0
Total reviews 0
Entries 2
Votes cast 22
Last entry 3 months ago
Photos uploaded 38
Last upload 3 months ago