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Saved by uncleflo on January 6th, 2019.
This is a simplified subjective method of testing lenses optical sharpness. This should not be confused with tests for focus accuracy and discrimination in a 3D environment, that is a totally different issue although often confused by the inexperienced. A focus accuracy test is suggested here Focus Test. The advantage over this method, compared to just taking a shot of a garden etc, is elimination of variables such as subject and camera movement, insufficient depth of field, flatness of field and variations in focus location. It uses a nice consistent high contrast subject to make comparisons easy; checking sharpness on general photographic views is not very easy. As the method is subjective, it is worth testing against a known good lens for comparison.
sharpness histogram sharpen broadsheet flatness clipping lens stabilizer timer infinity check focal pixel recommend exposure adjust compensate focus filter optical hardware camera comparison accuracy precise precision photo photography test testing environment confuse compare equipment standard quality
Saved by uncleflo on July 23rd, 2016.
10 best alternatives to the Google Keyword ToolIt is an indispensable tool for developing a potent inbound marketing strategy and improving SEO. Search engines favor compelling content, but you won’t generate much traffic if you don’t include the words and phrases people are most interested in and actively searching for. Because many of the available keyword research tools are confusing and counterintuitive, the process can be challenging and time-consuming.
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