dsjtecserv

Lives in United States Northern, VA, United States
Works as a Technical Director
Joined on Jan 21, 2005

dsjtecserv's recent activity

  • I routinely save my processed files as tiffs with all adjustment layers, masks, layer styles, groups, etc. intact. They are all there when I load the file back into Photoshop. There is no ...
  • Not, it wasn't your imagination. This is a well-known method for eliminating dead or stuck pixels with Canon cameras, and doesn't require a trip to a repair facility. http://www.bluehoursite.com/ar ...
  • I had the same need to detach the strap when shooting in windy conditions to keep the strap from shaking the camera on a tripod. I don't know if this would work exactly the same with Sony, but I ...
  • That statement is true, but is irrelevant to the OP's question. Using the same exposure on both cameras will not product equivalent images. Bobn correctly explained that to produce equivalent ...
  • You are very welcome, Miki; I'm glad you found the info useful. And yes, your final shot is a good illustration of the effect of shooting distance. I'm impressed by how well you have set up these ...
  • Nope. See below. It is true, and it is relevant to any case where you crop an image without changing any of the shooting parameters (focal length, f/number, shooting distance), but enlarge the ...
  • It seems to me that what you see is exactly what Michael described. He said the shot at 50 mm f/2.8 would give more depth of field when cropped to the same field of view and enlarged to the same ...
  • You still have a problem. In Barnack, the "35 mm Coc reference" field is for entering the CoC that is appropriate for a 35 mm (24 x 26 mm; "full frame") format. As stated in the documentation, 35 ...
  • You don't say what aperture you assumed, but in order to get a depth of field of 1.9 ft, you would need f/0.95. Could you show us a picture taken with your 150 mm f/0.95? The scenario requested by ...
  • Replied in panorama
    Though it isn't the distortion that needs to be low enough, but rather the parallax error. The software can handle things like barrel distortion with ease. But if object in the foreground are not ...
  • I can't immediately provide you with the examples you ask for, though someone else may be able to. However, whether or not they are provided, you can keep the following principles in mind: (1) If the ...
  • Note that good quality panorama software includes correction for lens characteristics and imperfections (including barrel distortion) in the equation used to determine how pixels are warped ...
  • Replied in panorama
    What the are referring to is the "no parallax point" which is the center of the entrance pupil of the lens (the may have said "nodal point", but that's wrong, so ignore that!). This is unique to ...
  • Henry, all you have to do is read the posts above for an understanding of how the size relationships are affected by the relative shooting distance. It has been demonstrated that 1) the size and ...
  • Replied in 100% fake NT
    Henry, here's a link to the Photographer's Ephemeris, showing the relationship between the the azimuth of the moon a few minutes after moonrise on Tuesday night (when the photo was taken), the ...
  • Beat you to it! https://www.dpreview.com/forums/post/58237429 Though I didn't try to narrow it down to a precise location; that was good sleuthing! Dave
  • Of course it can. Have you never looked at the moon at night?!!!! The moon rose over NYC Tuesday night at 11:08 p.m.,  at which time it was dark (in NYC) but the moon was bathed in sunlight. Does ...
  • Correct; if this was taken yesterday, 8/24, the moon rose over NYC at 11:08 p.m. Dave
  • Replied in I vote fake
    According to the information given in the article and by a fellow above, it was at 600 mm with a 1.4 extender, or 840 mm. Plus it may have been cropped to some degree as well. Dave
  • Replied in I vote fake
    Have you viewed the scene from 25 miles away before? Really? A building the size of the World Trade Center? Dave
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