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peter_daalder

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Posts posted by peter_daalder

  1. <p>Sorry to read about the loss of your 20D and lens, Jim.<br>

    I've done some (family) portraiture with the 50mm f1.8 on a 20D, but it is only appropriate for full body, or upper body portraiture. As you would know, for facial portraiture, a focal length of at least 70-100mm would be better.<br>

    I've got the 17-40mmL and use it mainly for landscaping in combination with my 5D. Even with a 1.6 body (50D), I don't think I would use it for shooting portraits.</p>

  2. <blockquote>

    <p>Unusual to see that much CA in dark hair tho'.</p>

    </blockquote>

    <p>Lex,<br /> CA did pass through my mind, but I have never seen an example of the effect, to this kind of extent...</p>

    <blockquote>

    <p>A couple of my favorite lenses for photographing people have similar problems with CA wide open, especially the old 50/2 AI Nikkor.</p>

    </blockquote>

    <p>To open up a can of purple fringed worms...<br>

    Knowing that you have shot lots and lots of B&W, CA should be a non-issue with that particular medium.<br>

    Have you ever considered changing to monochrome, to overcome the shortcomings of these favourite lenses?</p>

  3. <p>

     

    <p>My choice would be the Canon 24/1.4 II, stopped down to f2.<br>

    Keeping in mind that 24mm on full frame sensor/35mm, will already capture a huge swath of the sky, measuring about 73x53 degrees (diagonal FOV - 84 degrees).<br>

    Mentioning the DOF factor in your question, suggests some inclusion of foreground features/horizon in your planned exposures.<br>

    A range of exact measures can be obtained <a href="http://www.tawbaware.com/maxlyons/calc.htm" target="blank">here.</a><br>

    The exposure times that Bob suggested are spot on for shooting near your horizon. If you are aiming higher up in the sky, near Polaris for instance, doubling the exposure time should be feasible (i.e.: 80 seconds).</p>

     

    </p>

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