Jay Brookstone

Jay Brookstone

Lives in United States Southern, CA, United States
Works as a Photographer
Joined on Apr 5, 2004

Jay Brookstone's recent activity

  • On a 5D Mark III in bright light, it is doing very, very well. I normally shoot baseball (high school and college) with a combo of the Canon 5D Mk III + 300 mm f2.8 IS L (plus 1.4x and 2x TC IIs), ...
  • Replied in Look again...
    At 16mm/f4, the TDP (www.thedigitalpicture.com) vignetting plots show -3 stops down in the corners that improves to -2 stops as the inner 2/3 image circle is approached, most visible in the upper ...
  • Just:  I'm not photographing a sphere and atmospheric lensing is not in play here.  The subject, such as it is, is at virtual infinity and the lens is pretty well corrected for Petzval field ...
  • Tim... do you really have a point? Suggest you look at my examples above, look at the measured vignetting profiles at "www.thedigitalpicture.com", and be done with it.  Regarding lack of correction ...
  • Tim:  T-Stops are not complex and have been around forever, particularly for filmography, where lens light transmission efficiency can make a difference in scene consistency, particularly when ...
  • ...What does that really do for me?  In short, I still have to correct vignetting in many situations, if I'd like to use the outer 3rd of the image area.  Not a disaster, just time and effort.  In ...
  • The Udvar-Hazy Smithsonian Air Museum extension near Dulles Airport is in a purpose-built super-hangar the size of many football fields.  Its much bigger than the one on the Mall.  If you ...
  • Replied in What? Me worry?
    Very few reports on this lens discussed the pronounced vignetting it shows - much worse that the f2.8 equivalents on a full frame body.  Your shots show it, too, but are busy enough to make it ...
  • Replied in Examples
    OK. Here you go. Two scenes, two images each, one at f4 and one at f22. 16mm/f4 no filter or lens shade attached 16mm/f22 no filter or lens shade attached 16mm/f4 no filter or lens shade attached 1 ...
  • Hi Mad: Very nice product photos, BTW.  Didn't see too many at 16mm/f4, though.  Lots of vignetting (good use of it) in the product backgrounds that are not deliberately blown out or in deep ...
  • Try shooting a wide-angle panoramic of a clear sky, with no filter.  This will show the issue much more clearly.
  • I see what I see. The vignette map at The-Digital-Picture.com seems consistent with my experience.  I know of no lens defect on a copy by copy basis that could cause this.  Suggest you try the ...
  • Just an FYI that some may find useful before purchasing... I've just finished experimenting with the new Canon 16-35 f4 IS L full-frame wide angle lens (on a 5D Mark III body), prior to taking it ...
  • I've never been happy with the Eye-Fi card:  Its range is short, configuration complex and limited, and its slow. I've abandoned this device as unreliable. At about triple the price, I've had good ...
  • Interesting comments, especially regarding geometry. Most SLR lenses are corrected to compensate for de-focusing due to distance that varies with radial angle when imaging a flat object parallel to ...
  • (Sigh!) Its soft, period, and has a glitch that tends to make this condition worse. But you may be able to improve sharpness through technique. The Canon 24-70 f2.8 L Mark I has (in my experience) ...
  • I have and use all of the Canon lenses on your list EXCEPT the Canon 24-70 f2.8 L Mark II (I have the Mark I). The 24-105 IS L is compact, reasonably priced (for an L lens) has a very useful range ...
  • Replied in 300 f2.8 IS
    I use the 300mm f2.8 L IS for many baseball action shots, paired with a 5D MkIII and 7D.  I often need to shoot wide and crop down to capture action.  For this reason, resolution and contrast are ...
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