Topic » Sigma 50mm f/1.4 DG HSM Art

Lenses and Optics

Practical Use of Field Curvature Graphs – the 50mm Primes


In my last two posts (1,2), I’ve been using field curvature graphs to look at how lenses behave as you stop them down. It’s been a fairly limited data set; basically 35mm prime lenses and some zooms at 35mm. I’m going to keep going with this topic and today look at a different focal length […]

How To's

Getting Started in Deep Space and Astrophotography


It is sometimes said that astrophotography is one of the most challenging types of photography out there. There are numerous technical problems to overcome, substantial initial investments, and a considerable chance of getting burnt out if you get too frustrated. Luckily enough people have attempted astrophotography to form a general idea about what the best […]

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