Sheld

Sheld

Lives in United States Austin, TX, United States
Works as a Engineer
Joined on May 5, 2001
About me:

Pentax k-x, 55-300mm, 10-17mm, 30mm/1.4, 16-45, 28-75mm

Sheld's recent activity

  • Here's my attempt at photographing the blood moon.  I wish it was sharper :) K30, 1/5th of a second, F/6.3, ISO3200, 150-500mm @500mm
  • nice composition.  I can see that UWA landscapes benefit from clouds, and create this interesting cloud pattern due to corner stretching. - Shel, my photos, http://www.sheltx.com/
  • I notice your first image was from a fisheye :) For wider FOV's, I prefer fisheye.  My theory is that 15mm aps-c is a good ultrawide compromise, and composition gets increasingly more difficult at...
  • math guy wrote: Have you considered the Sigma 8-16? I don't have it, but if I were going to get an UW zoom, that would be the one based on the results I've seen from it. I did consider it; almost...
  • There are several wide angle zooms, the Pentax 12-24, and the Sigma 10-20 etc. But it seems the most compelling ultrawide images come from the DA15, not the zooms. See the 15m-contols-my-mind...
  • Younes B wrote: Now how would you shoot such a scene to get acceptable sharpness across the frame ? ( assuming the use of a tripod) Thanks! Either, live view focus the point closest to the corner,...
  • Of course, once you realize that the DA15 edge/corner sharpness problem is mostly due to field curvature, you can also get perfectly sharp images at F/6.3, where much more of the image is in focus...
  • For my K30 and DA15, an "AF fine adjustment of" "-4" seems to work well.  But even easier, is F/8 or F/9, manually focused all the way to infinity. See the image below at F/9, manual focus all the...
  • Ron AKA wrote: Sheld wrote: So, 204ppi for Costco printers is fine, and the file would not benefit from manual uprezzing. Does Costco give you a discount for using less resolution? If so, perhaps...
  • Gary Martin wrote: It's mostly from focus field curvature, which is a necessary trade-off when designing small wide-angle lenses. There are ways to deal with it, or you can just use a much bigger...
  • David Bourke wrote: Anyone enlarge the sample taken with the DA 15mm in the K-3 review. It is sad how soft the edges are at f6.3. I have this lens, so I know that this shot would have been better...
  • Ron AKA wrote Those that change the resolution to the native printer driver resolution are looking for the "gold standard" and not just "good enough". Do you know what the native resolution is of...
  • I tried an experiment. Start with a pixel sharp 2100x1500 image, at 300ppi, for a 5x7 Costco print. Then resize to 1428x1020, or 204ppi. Both images were sharpened so they were both pixel sharp to...
  • Charles2 wrote: 1. Depends on whether you see a difference between the upsize algorithm you use and the one that Costco uses. 2. You get the opportunity to sharpen after the upsize. If you want...
  • I can understand cropping, and getting the aspect ratio correct, and sharpening, and raw image processing to get the contrast right. I'll even add borders to get an image with the exact right...
  • I just looked at your painting size, 146x97cm or around 40"x60". That is one huge painting!I would try F/2.8 or F/3.3 with a small sensor camera like the Olympus. Honestly, with good lighting, the...
  • I am looking for a recommendation for large format B&W prints to buy. I recently bought Ansel Adams "Moonrise over Hernandez", which is a classic 8x10 large format photo, available inexpensively as...
  • brecklundin wrote:.... I don't recall where I read it but there is a quote from Ansel Adams when he was asked to help design or was simply asked what needed to be done to make a "perfect" lens. His...
  • Is there anyway to get images off my K30 camera, unto a Samsung S3?  This would be if I don't have internet, and I want to quickly post a DSLR picture onto facebook, or send an email.  Is there any...
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Photos uploaded 5
Last upload Mar 19, 2010