12/30/2023 0 Comments Helios lens cahrt![]() ![]() ![]() On the other end of the spectrum, the Richard Gale Optics Clavius primes, which are based on the legendary Helios 44-2 58mm f2, is well known for its "swirly bokeh" reminiscent of Petzval lenses. The Leitz Thalia lenses, have very uniform bokeh from the center to the edges due to their modern optical design and the fact that they are designed to cover a much larger image sensor than the Alexa LF. ![]() Bokeh changes significantly from the center of frame out to the edges, and at every iris setting. But a lens' optical design and housing effect the character of its bokeh, as well as the aperture setting, and of course the shape of the iris when stopped down. Out-of-focus pinpoint light sources are rendered as round orbs in spherical lenses, and elliptical orbs in anamorphic lenses. One of the most distinguishing characteristics of any lens is the unique out-of-focus areas or “bokeh” it produces. So please enjoy the bokeh of 167 different lenses! Full Frame Bokeh Chart Often (especially with older lenses) no two focal lengths in a set will have the same bokeh. Observing a lens' bokeh can become as interesting as how it renders your subject. A spherical lens has 0 squeeze factor, so the bokeh remains circular. It’s squeezed even less with 1.33x anamorphic lenses, and less still with 1.25x squeeze lenses like Panavision Ultra 70. In a 1.5x squeeze lens like the P+S Technik 35-70mm T3.2 or the Iscorama adapter we tested, the bokeh is not squeezed as much. A 2x anamorphic squeezes the lens' entrance pupil into a very narrow oval. In anamorphic lenses the amount of elongation or squeeze of the out-of-focus areas is directly effected by the squeeze factor of the lens. ![]()
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