I seem to have trouble getting consistently getting sharp landscape photos. How far can you stop down on the K30 before diffraction is a real limiter? This question would be for landscape photos enlarged to 30"x20",
I usually stick with F/8, for landscapes using my DA15, and DA21, making sure to focus on the background, preferably near the edge of the image.
I recently made an 18"x12" enlargements from the DA55-300, and I was unhappy with the soft corners at 170mm, F/8, but I didn't try focusing on the edge, instead of the center. Could I have gotten better results stopped down to F/11 or F/16 (with tripod)?
I have learned that with the DA15 and the DA21, I can get sharp corners at F/8 but that it really helps to focus on the edge of the picture instead of the center due to field curvature, or alternatively, to just know where infinity for the corners is on the lens. I have some DA15 pictures that had soft corners at F/8, and other that were very good. But I haven't experimented with F/11 or F/16.
Here's the DA55-300mm photo at 170mm F/8, which has soft corners when enlarged; although I have another at 150mm F/8, the Los Angeles skyline from the Griffith observatory, that looks pretty good (sharpened a bit).
Here's the disappointing soft lower/left corner at 1:1
- Sheldon
Last edited by sheld; 02-13-2014 at 08:29 AM.