James O'Neill

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

James O'Neill's recent activity

  • I sent mine back - I read the spec but just hadn't grasped how big I really was. Good as it is, I just can't take that out for a day .
  • You're welcome - my experience was light use for the first few years and more intensive lately, so I wouldn't say it added up to vast, but I do have a feel for it. OK. I suggest you do the initial ...
  • D.o.F isn't an on / off thing.  It's a "close enough to in-focus" thing. Zoom in to 100% or more and you will see the slightly-out-of-focus areas aren't tack-sharp. Pixel peeping will tell you what ...
  • I've had the 77 about 10 years, and use it a lot more since I got the K1. It has a perfect storm of D.o.F problems, 1. Depth of field depends on the square of absolute focal length divided by ...
  • An adapter could attach a K Mount lens to the M42 body but it would effectively be a macro extension tube - and incapable of focusing to infinity.
  • And there is the quandary. First off there isn't a "penalty for keeping the sensor in the dark". It keeps the sensor cool , lowering noise, and reducing batter consumption. You can use a phone with ...
  • https://www.dpreview.com/forums/post/61638058 I'm not even sure if I had that idea first. But this is one rumours site picking up one post in a forum which a report of conversation with someone ...
  • From a K1 perspective - and that has the newest WiFi of all - there is reasonable functionality - I've written my own code to talk to the camera. The problem is wifi speed. It runs at 10MBit/sec ...
  • (a) Your expectations had to be that Pentax would be closed down for it to be called a nice year. A lens shipped, A body was updated. Can't call that a stellar year. (b) It's best not to probe too ...
  • In APS-C one might have an 18 to more-than-105 (Pentax has an 18-270, which is 15:1 ratio and I have it's processor which as 18-250). but the wider the wide end becomes the harder it is to get ...
  • Replied in What for?
    All the problems will be solved.  Of course. That's what the Fanbois always say. Some form factors just work, and some innovations are blind alleys. Look at the disc camera. Some technical ...
  • Replied in What for?
    Who says Milcs are the future ? Cameras with viewfinders continue to outsell them and despite all the drum banging mirrorless fan boys MILCs aren't taking over. CIPA first split SLR and MILCs in ...
  • I think that's a good list.  NR which is done by the accelerator chip (where fitted) goes into the raw, other NR is part of processing. IIRC someone posted here that the unused pixels in a cropped ...
  • I use the FA 77 a lot. On my K7/K5/K5iis I used the FA 50 more, on the K1 it's been used for over half my shots. It's small and light and helps the general feeling of not pointing something huge in ...
  • Replied in L-mount?
    I'm thinking about it in fairly abstract terms.  Joining early is an alliance, joining late is a surrender. So it's early or not at all. Speed is their issue. Taking resources away from K-Mount … ...
  • Replied in L-mount?
    If you are going to join such an alliance, it needs to be early - or the other members gain too much of an advantage.  It makes sense for Pentax; they don't need to do a full set of lenses or a ...
  • Replied in CP+ 2019
    <snip> If the buyers are only existing owners the game is up. Some owners will defect to other brands, some will have their system and not add to it. Some will die. They need to have a range which ...
  • The article says CA (Chromatic Aberration) is very well controlled, the centre especially so. In general shooting CA does not seem to be a problem. And that shot could have been designed to test ...
  • I posted this https://www.dpreview.com/forums/post/61638058 . But you said guess … Based on 2017 and 2018 a more realistic guess would be nothing, nada, nowt, not-a-sausage, two-thirds-of-diddly ...
  • That's also possible - there may be a maximum ratio from widest to narrowest - it can stop down small enough on the 55-300 to get f/22 at 55mm (and f/32 at longer focal lengths) I have 35,000 ...
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Total messages 4581
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Last post 3 days ago
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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 10 months ago