JonPB

JonPB

Joined on Apr 24, 2014

JonPB's recent activity

  • My understanding is that anomalous partial dispersion glass is a useful tool for color correction, but that it is neither necessary nor sufficient to create an apochromat. I believe the article...

  • Replied in Leica Price?
    How can you justify the cost of a car? Other than the laziness and conspicuous consumption aspects, my bicycle paired with a nice camera is superior, or is it? Automotive fanboys or trolls please ...
  • No. I pulled those numbers out of the air. My point is that "perfection" is impossible, and that "imperfections," or "defects," are essentially tests of testing equipment and method rather than ...
  • I'm not a videographer, so maybe you can help me a bit here. When does having a minimal kit and shooting 4k overlap? I mean, handheld 4k video has got to be awful--I've never seen it, but I have a ...
  • Value and worth are hard to talk about. The future value of the lens is unpredictable, as it depends on the future of the photographic market. I'd guess that the likely increase in value of a ...
  • In my humble opinion, there's a gap between "imperfect" and "defect." I haven't seen just how imperfect these lenses are: it could be a reasonable complaint, or it could be overhyped expectations. ...
  • Snitk228-- my evaluation is that the Tessar has considerably more astigmatism than the Sony around f/4, and also that the Tessar is noticeably better at f/8. So, oddly, I think I'd prefer the kit ...
  • For a user-quality lens with six holes and five screws, I wouldn't worry about it. Heck, Leitax even recommends using fewer than all of the screws for some of its adapters, and I don't believe ...
  • Thank you! I have a few exercises that I do when I'm feeling stuck. One is to simply look at pictures; I give each picture four or five seconds of my undivided attention, especially if I feel like ...
  • To me, "shot discipline" means thinking through and making conscientious decisions about as many variables as possible that go into making each image. It is the opposite of run-and-gun shooting. ...
  • The Leica R lenses are great for me. They're fully manual, so they operate nicely and are unlikely to fail. They're dirt cheap compared to their optically- and mechanically-similar M brethren. ...
  • I don't think the a6000 is awesome in that it makes everything else look like junk, but rather it does some things better than its predecessor. The Canon G series will indeed be a better camera ...
  • The best solution of optical corrections to minimize image aberrations is not necessarily the minimization of easy-to-digitally-correct aberrations like distortion, longitudinal CA, or vignetting....

  • The best solution of optical corrections to minimize image aberrations is not necessarily the minimization of easy-to-digitally-correct aberrations like distortion, lateral CA, or vignetting....

  • I bought a used NEX-7 last week. Here are my observations: http://tools.science.si/index.php is the only shutter count calculator for Sony cameras that I'm aware of. The rubber on the grip can peel ...
  • Commented on Updated: Creating the Leica T article

    Copyedit: "No one will argue that Leica cameras are expensive." (That's the lead sentence from the main page for this post.) I certainly would, but I believe what you meant is the opposite, that...

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