a_c_skinner

Lives in United Kingdom Cumbria and Northumberland, United Kingdom
Works as a Physician
Joined on Oct 4, 2009

a_c_skinner's recent activity

  • For a while I had an X-E2 and an X-T2.  I did take some careful comparisons from a heavy tripod using my 80mm macro at about f8 (so as sharp a lens as one could want).  I could see a difference, ...
  • " I think the "Leica look" is just a common slang to describe " the fact that someone has spent a small fortune on camera gear and is trying to persuade  themselves or a spouse that it was worthwhile.
  • "and we also assume that both cameras collect same light (aperturees might be different but one can compensate with shutter speeds)" I don't think that assumption is correct.  Same light means same ...
  • I'm not sure I follow you that.  You've not had the camera in your hands have you?  It is easy to get shutter count from Nikons and usually sellers provide this but that seems your main concrete ...
  • "Some D lenses, like my 35-70mm f/2.8D, are renowned to have mold built-up." The 35-70 AF-D (and the AF) suffered balsam separation, but I'd not come across a general proneness to fungi.  Do you ...
  • AF-D lenses were developments of the early AF lenses that transmit the focal distance to the camera body.
  • I've had prints made on Foamex a polymer board, which produces images with no border and ready to hang (by gluing stuff on the back).  It isn't hugely more costly than printing on good paper.
  • Cropping has the same optical effect as a small sensor, just discarding the outer part of the image circle.   The point is that the DoF is greater with small sensors or cropped when you adjust ...
  • You can use whatever lens you like.  Generally landscape is better with a nice sharp lens, the aesthetic effects of grain and blurr and vingetting are less effective in landscape. There is a view ...
  • The FF advantage in low light is better high ISO performance, so less noise as the pixels are less dense.  You will get all sorts of replies to this but that is what it boils down to. DoF will be ...
  • Sigma and Sony.  You'll always wonder if the bigger sensor would have been better otherwise.
  • All the stuff I can find is cataract from electrical effect of lightning strike or indirect electrical not light injury.
  • "Is there anyone who uses a camera flash who also has/had cataracts?" Yes.  Lots of people.  Because both are common.  Lots of teenagers who get lifts to school have acne, you get the idea. The ...
  • "the majority of my shooting is done with the Olympus 12-40 (FF eqiv 24-80) f/2.8 lens, or the equivalent Panasonic 12-355 f/2.8. Both of these are excellent, very sharp lenses." I've little to add ...
  • Good.  Being British I need to apologise for asking if it was costly.  Do you have their www address too?
  • I think Thorium is a beta emitter as well, which is more energetic than alpha. The main risk such as it is seems cataract from irradiation of the crystalline lens in long term users.  The main ...
  • Yes, they seem to talk about radiation dose in people taking Tv or movie for a living, so unlikely to be a big problem. The luminous paint was a manufacturer not a user issue .  All the radioactive ...
  • That link makes the point that it is irradiation of the lens in your eye that might be crucial.  Lens dose is an important consideration in brain CT scans, despite the whole examination being ...
  • They are beta emitters from thorium oxide glass I think. This page seems a reliable start.
  • Like all lenses some designs are good, some less so, even modern ones!
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