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...

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...

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,...

Problem There has been some discussion about noise level of underexposed shadows from Canon EOS 5D MkII at ISO 100 compared to other FF cameras. I usually don’t have to push the exposure and find the problem theoretical, but I...

I have been using the Canon EF 17-40mm f/4L USM for several years. I liked this lens a lot, especially its color and contrast. Unfortunately, I do not use flash and even for hand hold nature shots I frequently...