EXCERPT page containing first few paragraphs. 2019-08-24 01:07:56
UA_SEARCH_BOT_null @ 188.8.131.52
I almost did not publish this series, but the behavior is weird enough that it needs to be shown.
At left, the area from the steps to the distance is quite sharp, even at f/3.5. Moving to the right, the image becomes increasingly blurry. How can this be explained by anything other than lens skew (asymmetry)? Unclear, but weirder still, stopping down to f/5.6 makes the right size vastly superior to f/3.5. What has changed from f/3.5 to f/5.6 is a mystery (lens was focused only once)—while the various other series show a forward focus shift both near and far, so that might explain things in part, the improvement is so dramatic that one has to wonder if there is something else going on. Could the lens be focused “past infinity” (by mistake) and be showing an asymmetric sharpness as a result? No easy answer presents itself.
Article continues for subscribers...
Diglloyd Medium Format is by yearly subscription. Subscribe now for about 33 cents a day ($120/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!
These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
- In-depth lens evaluations covering behaviors not likely to be found anywhere else, based on real-world field shooting.
- How to configure menus and buttons and best operating practices, gotchas and how-to.
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens and camera behaviors.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to 100 megapixels filling up to 5K display, plus large crops.
- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.