pentaust

Joined on Feb 5, 2016

pentaust's recent activity

  • Of course. We're not talking about using SR for moving subjects. For statics subjects, even 1/200th exposure with 600mm equ. lens is a big advantage.
  • Prediction is "easy", as they've already shared their plans in a video and lens roadmap. So a lot of projects have been run in parallel inside Ricoh, but none of the new products are ready for ...
  • Yep. I just think it is wiser to just flatten statements such as "excellent" and "best lens ever used" , because marketing tend to have us lose perspective on things. Fuji MF is only about 25% ...
  • In my opinion, optical design constraints vs size, cost and selling quantities are such that I'd be surprised if one brand produced lenses that were orders of magnitude better than others. So I ...
  • 1) Underexposure: Underexposing and keeping ISO low isn't optimal, because there is some processing going on in camera hardware, which improves overall image quality for 0v exp. comp. It's better ...
  • I wouldn't take frames of reference with a grain of salt ;-) , because that's what I'm using myself in my subjective assessment of lenses :-)
  • Many thanks. Great feedback. So if I do a qualitative ranking based on 100% center & corner crops from imaging-resource site, here is the ranking I get. Primes: 45 (best corner to corner, from wide ...
  • Thanks Kristian, Ah the field curvature, I thought the 45-100 also suffer from it?
  • Sample variation is possible, of course. :-) sure. I trained my eyes to compare lenses about how they resolve from center to corners (corners relative to center of the same lens). How much corners ...
  • Great, thanks a lot. Your ranking has similarities with the ranking posted from JIm. What lens, do you believe would make the GFX100 not to deliver up to its 102Mpixels, even after correcting in ...
  • Strange. From the image samples I've seen from imaging-resource, I could say that the 45-100 is that good, not at all focal length. I could say, I have more that one Pentax lens (yes, very ...
  • Created discussion thread GF lens ranking
    Difficult to find side by side tests of GF lenses. How would you rank GF lenses for their optical qualities, from best to worse?
  • Yes, I agree. Assumption are often missing to save time and reduce the amount of text, that often source of poor communication.
  • That's an interesting opinion (if opinion is the proper word). I thought that the rectilinear projection done optically (via an aperture) resolves more than the operation of digitally flattening a ...
  • I insisted about projections and rectilinear projection in particular because that's what all lenses project, fisheye lenses excepted. Of course, if straight lines don't come out straight, then ...
  • Wow, great image.
  • You gain resolution, of course, but in some cases, the gain is not 1to1 as  you'd expect. You gain resolution proportionally to image area, with the exception of wide angle panoramas including ...
  • I'm not suggesting that stitching is limited to one row. I'm suggesting that stitching that produces a wide angle rectilinear view comes with loss of resolution. That requires an understanding of ...
  • Nope, because the projection stretches the outer area of the original images to project the 2D images onto a spherical area. A 120degree wide pano vertical stitch doesn't resolve more on the sides ...
  • In here above posted panorama, non-rectilinear projection was used (some variants of cylindrical projections used) , so the look is definitely not the MF (with rectilinear lens) look. If those ...
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