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Topic » Sigma 50mm f/1.4 DG HSM Art

Lenses and Optics

Practical Use of Field Curvature Graphs – the 50mm Primes

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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

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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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