Calculations of hyperfocal distance and depth of field require that you establish what is an acceptable level of blur. Some hyperfocal/DOF tables and calculators base acceptable blur on smaller sized prints. Such calculations can be acceptable for certain types...
Lightroom 4.1 introduces new CA removal tool that addresses all types of chromatic aberration. The tool is very easy to use and does really good work. You can select automatic correction, use color picker to select the fringe color(s)...
The earliest known permanent photograph is the View from the window at Le Gras by Nicéphore Niépce. The photograph was exposed by camera obscura on bitumen coated plate. Bitumen is sensitive to light, but not much. Eight hour exposure...
There are many great reviews of those lenses, some links are provided at the end of this post. Focus of this non-scientific mini test is to add information how the two lenses compare in aspects that I did not...
Factors impacting depth of field (revised) Depth of field (DOF) is impacted by the following factors: Factor Details Aperture The wider the aperture opening, the narrower is the depth of field. Focal length The longer the focal length, the narrower the DOF. Camera to subject distance Sorter distances...
Adobe Labs released Lens Profile Creator utility that enables creation of custom lens profiles for Photoshop CS5 (ACR 6.1) and Lightroom 3. This page contains profiles for some Zeiss ZE lenses for Canon EOS 5D II that I created using...
Sharpening and micro contrast enhancement has been frequently used in film photography. This article briefly introduces similar digital and analog techniques. Digital Unsharp Mask Unsharp mask selectively increases contrast of edges and small objects by making dark...
There are many web sites where photographer can find tests and reviews of lenses. Some of these sites are listed below and this is no attempt to provide information about general performance of lenses. Instead, I am focusing on...
B+W polarizers have great reputation and I always thought about them as the automatic selection for my lenses. However, I needed new slim polarizer for my UWA lens and B+W did not work well for me this time, because...
Canon 100/2.8L Macro is a lens with primary use in macro photography. This article is looking at how is it doing at longer distances to help decide suitability for landscape work. Sharpness Test Conditions Test images were taken with Canon EOS 5D2,...