Imaging recource: All about that bokeh: Lensbaby Twist 60 optic gives photos a Petzval-like spin on a shoestring budget

    Want to give your portrait photos a really distinctive look? There can be few more eyecatching than the Petzval portrait lens invented in 1840 by German-Hungarian physicist and mathematician Joseph Petzval. Some 176 years later, his creation remains iconic thanks to the combination of sharp rendering at the center, and a unique bokeh which seems to spin and swirl around your subject towards the edges of the shot, helping to isolate your subject from its background while providing a look unlike that of modern optics. Nowadays, you...
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