tony field

Lives in Canada Calgary, Canada
Has a website at http://www.tphoto.ca
Joined on Oct 18, 2002

tony field's recent activity

  • Created discussion thread SNR, std.dev., Photoshop
    When I choose to examine image noise, I select the image, convert it to B&W adjustment layer, and convert to linear gamma ( as per Jim Kasson) . Typically, if possible I examine a selection area in ...
  • I have no issues with std.dev. being used as a comparative noise indicator since it is the only tool I have available that allows measurement. As I said, I really don't know the implication of ...
  • Yes they are certainly related visually and by various statistics. However, my philosophic point is that they may be considered unrelated since the down-sampled image is a "new image"... i.e. ...
  • This is IMHO a philosophic discussion (and MBP was part of a long discussion about this last year). Of course, the original noise of an image propagates to the down-sampled image according to the ...
  • I think, for real shooting, this strategy works well enough. Like you, I have figured out how my camera works for the blinkies, and only use UniWB on my Canons when needed (vary rarely). If you ...
  • Does this not imply that you are in fact really and correctly, an "exposure freak". ISO setting simply causes the sensor chain to adjust the processing to essentially create, for the light meter ...
  • Shooting digital is much more like shooting slides - expose for the brights. The normal objective is to expose in such a way as to ensure important highlights are not blown out. The common term we ...
  • The problem with composition is that it can be transient for many subjects that I shoot. Often I concentrate on the subject itself. My skills allow me to shoot the subject well (for my subjects ...
  • I am the odd man out..... Yes, your gave full context which was understandable. I don't happen to "like" the term when it is promoted in the gerund form as a noun. IMHO there are better terms to ...
  • All you are saying is that "crop" is a conversationally malleable word  and that you have to infer the "exact" meaning from context.  This is often the case.  However in many cases a more ...
  • This escapes me... since "crop" is a very nebulous word (and generally is a reference to "reduce in size")  and does not reference image characteristics.  I cannot figure out what you mean by ...
  • I find the concept of "total light" to be easily understood. As a "photographer" it describes an entire image attribute that, because of my familiarity with using the term for years, makes ...
  • Indeed this is the serious side of "framing" or subject decision. Often with static subjects it is generally easy (but not always) possible to clearly see a story. For less static subject, a story ...
  • For what I often shoot, scanning is needed but often distracting.
  • Created discussion thread How to frame a picture.
    Framing a shot is not always perfectly obvious or easy. I always have problems trying to frame a picture when in a "rush".... I usually result to editing to see how "it should be framed".  I tried ...
  • One thing to consider since much of this thread is very good information. Shoot using Auto-ISO. with the camera in Manual, auto-shutter, or auto-aperture mode. Since "exposure", (scene luminance, ...
  • A photon has no "known" size. It only has a quantum probabilistic cross- section when treating a photon as a particle. Draw your own conclusions. This is a silly discussion. You are so far into the ...
  • Yes, that is true. where exposure is a unit area concept. Why introduce the additional integration from a point. That is just mathematical mumbo-jumbo. They are identical for the same scene ...
  • Then you are overthinking this when we have such convenient and easily understood concept that apply and we can experimentally confirm the concepts with our cameras! The introduction of a "point" ...
  • Good gosh. You are now way way over my head. Photons incident on a point (as far as I can guess) is a problem of Quantum ElectroDynamics with which, I guess. it is possible to compute a ...
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Total messages 8201
Threads started 557
Last post 1 hour ago
Total comments 18
Total likes 12
Last post 3 weeks ago
Total reviews 0
Entries 7
Votes cast 3
Last entry Oct 5, 2015
Photos uploaded 94
Last upload Oct 28, 2015