I recently came across a discussion online about how a Speedbooster works. There was so much misinformation and conflicting statements that it compelled me to write this: I hope to dispel some of these mistruths and make clear what a speedbooster actually does.
I’ve begun a series of videos about ‘legendary lenses’ – unique, rare or otherwise iconic optics. This is the first episode – naturally it had to be about the ultimate vintage lens, the Helios 44-2.
The Sigmonster. The Bigma. Green Machine. The Tank. This lens has many names; officially, it’s called the Sigma 200-500mm f/2.8 / 400-1000mm f/5.6. The lens is ten years old, and yet so little is known about it – so I decided to try it out for myself.
Much has been said about Sigma’s new cinema lenses – both good and bad. Particularly their high speed zooms, the 18-35 T2 and 50-100 T2. Sigma recently loaned me a pair of the zooms and so I took the opportunity to get to the bottom of things.
Prime lenses are smaller, lighter, cheaper, faster and optically superior to zooms. So why bother using a zoom? There are some instances where a zoom might just be the better choice.