uncleflo
Registered since September 28th, 2017
Has a total of 4246 bookmarks.
Showing top Tags within 1 bookmarks
howto information development guide reference administration design website software solution service product online business uk tool company linux code server system application web list video marine create data experience description tutorial explanation technology build blog article learn world project boat download windows security lookup free performance javascript technical network control beautiful support london tools course file research purchase library programming image youtube example php construction html opensource quality install community computer profile feature power browser music platform mobile user process work database share manage hardware professional buy industry internet dance advice installation developer 3d search material access customer camera travel test standard review documentation css money engineering develop webdesign engine device photography digital api speed source program management phone discussion question event client story simple water marketing app yacht content setup package fast idea interface account communication cheap compare script study market live easy google resource operation startup monitor training
Tag selected: flatness.
Looking up flatness tag. Showing 1 results. Clear
Lens Tests: A Simple Method
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
No further bookmarks found.