James O'Neill

Lives in United Kingdom United Kingdom
Joined on Oct 16, 2003

James O'Neill's recent activity

  • I didn't get on with Rawtherapee when I tried it before - too much fancy tech and no UI design ! It might be time to have another try I don't think this is a lens aberration, the behaviour where ...
  • Yes I understand bayer artefacts (at least in theory) and what happens when we get a line of detail which is narrower than the set of pixels which are composited together to get all 3 colours. I ...
  • That's the whole thing . 20MB of JPG :-). Tripod mounted K1 /DFA*85 , ISO 100, 1/640th @  f/5 (exp. comp +0.3)  focus on centre point. The crop is from the off-white house near the left edge of the ...
  • I noticed the window mullions were not white and zoomed in for a closer look. and there do seem to be other places where the DFA* 85 has resolved things too small for the sensor. I switched to the ...
  • Created discussion thread What do you call these artefacts ?
    This is a very magnified crop from a K1 / DFA*85 test. The lines between the window panes should be white, and can be fixed using the moire brush in light room. It's doesn't look  like  CA because ...
  • They are nice. Actually you might not be able to make these with the 85, because I think the flower is closer to the camera than the 85's minimum focus distance. If you could, it would be the ...
  • I did an Pixel shift test shot with the DFA* 85. It's impressive. But I don't think you can say X pixels with PS is the same as Y pixels with out.
  • Yes. There may be 80MP FF sensors which are not in commercial production, and you could use a smaller sensor with that pixel pitch - interesting what sort of mules have been built to test .... And ...
  • Now that is a fascinating statement, because it suggests it has been tried, and that would mean ....
  • I've shared the whole shots, and they do have a bit of a mix at the centre. I'll work on getting some more examples.
  • I'm going to go looking for for a CA torture test, and the see how they both cope. Software cleans it up quite nicely so don't see it as an issue with the 77 but it's there.
  • I did say at the start this isn't a scientific comparison and that K1 focused very slightly differently. (I had to put in some focus adjustment for the 77 and a lot for the 43, I'm still not 100% ...
  • Replied in Full size JPEGs
    I've adjusted the curves to make the 77 closer to the 86 77 Ltd. exposure reduced 1/3 stop, contrast reduced DFA* 85, as shot
  • I keep meeting people who don't know how to do anything outside of "easy mode". pentaust claims owns two small sensor cameras, neither SLRs, and has only made 5 posts here (most to this thread) . ...
  • I said there is facial recognition mode, if you use live view but not in reflex mode. I don't know - and I don't think you know either - how crude or sophisticated the Face AF is with respect to ...
  • Not on that evidence. It's one section of vegetation rather than all the corners .  That might still be the case but it would some other tests.
  • The lily is slightly over but the bottom right corner is under. In lightroom a final version would bring the highlights down and the shadows up.
  • Still not manging to get out and shoot properly with 85 but I did manage to try to get some comparison shots done with the 77 , and I'm sharing one here shot from the same spot (so the framing ...
  • It's often said that the gap should be same length as the exposure, otherwise it jerks to much from frame to frame. IIRC, long exposures use more battery than short ones. I still think you'll need ...
  • You don't have "eye" AF in SLR mode on any camera; you can only have it in sensor based AF which can look for faces in general and eyes in particular. I'll be quite candid I've never used the K1 ...
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Total messages 4776
Threads started 75
Last post 11 hours ago
Total comments 14
Total likes 48
Last post Jun 1, 2016
Total reviews 1
Last review Oct 10, 2004
Entries 2
Votes cast 119
Last entry Sep 13, 2012
Photos uploaded 12
Last upload Feb 24, 2018