Sigma 24mm f1.4 ART vs Canon 24mm f1.4 II

24mm f1.4 lens is a very attractive combination of focal length and aperture. It can be very useful on a crop sensor and it makes magic on full frame. This is not going to be a classic sharpness comparison of two lenses at 200% zoom. Rather I’ll share with you my real life experience with… Continue reading Sigma 24mm f1.4 ART vs Canon 24mm f1.4 II

Crop factor math, aperture, focal length and sensor size

Let’s see how crop factor math works. If you are using APS-C or Micro Four Thirds camera or even some camera with smaller sensor, you can easily calculate your real focal length and depth of field. Bear in mind that most versatility you will have with full frame sensor and large aperture lens. This is… Continue reading Crop factor math, aperture, focal length and sensor size