Light Lens Lab 50mm f/2 "SP II"

Light Lens Lab 50mm f/2 "SP II"

The "SP II" stands apart from most Light Lens Lab products because it does not copy a famous Leitz rangefinder lens. Instead it reinterprets the Cooke Speed Panchro, a cinema lens whose original design dates to the 1920s and 1930s and which is associated with the so-called "Cooke Look" of classic Hollywood cinematography [3]. Reviewers describe it as the first Light Lens Lab release that is not a strict one-to-one replica but a lightly optimized version of the source design adapted for the still-photography 35mm format [1]. Original Speed Panchro cine glass is rare and expensive, so the SP II exists to bring a similar character to Leica M users at a far lower price.

Optically the lens uses a seven-element, five-group double Gauss layout, a relatively simple formula that does not fully correct every aberration in the way a modern computed design would. Light Lens Lab uses lanthanum glass chosen to approximate the optical behaviour of the original Cooke lens. The barrel is metal and the lens is compact at 61 mm long and 51 mm in diameter, weighing about 345 g, with a 43 mm filter thread. It focuses to 0.7 m, is rangefinder coupled through the Leica M mount, and is not six-bit coded. Handling details echo the cine heritage: a "rabbit-ear" style focus tab that can be swapped for a small pin or removed, a focus ring that turns roughly 180 degrees across its range, and dampened half-stop aperture clicks that move quietly rather than with a sharp detent. A built-in skylight filter sits behind the front element and can be unscrewed.

The lens is sold in a two-tone finish. Reviewers note that only certain special editions ship with a matching IROOA-style hood, while the standard lens does not include one [2]. Across published reviews two recurring observations are worth flagging for buyers: focus action can feel slightly stiff on some samples, and the front skylight element and supplied hood are part of how the lens is meant to be used rather than optional extras. Note that one detailed review records dimensions and an aperture-blade count that differ slightly from the figures catalogued here; where they disagree, the values recorded by LeicaLensList take precedence.

Optical qualities

Rendering The defining trait of the SP II is how much its look changes with aperture. Wide open at f/2 it produces a pronounced soft glow and low microcontrast, an effect reviewers compare to shooting with a mild diffusion or mist filter, which also makes precise manual focusing harder because the transition between sharp and unsharp is less defined. Stopping down to f/2.8 sharpens the image considerably while retaining much of that character, and most users consider f/2.8 the lens's most useful setting; further stopping down yields good performance even at infinity for landscape or architecture work. The lens shows little focus shift when stopped down, which is helpful for rangefinder use.

Distortion and vignetting Because the underlying design predates digital correction, distortion had to be handled optically, and reviewers report that it is very well controlled with hardly any visible distortion.

Flare resistance Like many vintage-derived designs, flare resistance is a weak point. Veiling flare with a bright light source inside or near the frame can wash out contrast significantly.

History

Development and Launch Light Lens Lab, based in China, specialises in reviving old and often exotic lens designs whose patents have long expired, doing so without crowdfunding and at relatively accessible prices. The company first drew attention with its "8-element" 35mm f/2 Summicron homage, followed by a compact 50mm f/2, and then this 50mm f/2 SP II. The SP II takes its name and rendering goal from the Cooke Speed Panchro, a cine optic used on numerous classic films and still admired for its distinctive imaging signature; Cooke itself has since produced a modern still-photo successor, the SP3. Light Lens Lab positioned the SP II as a faithful recreation of that look at a price far below what surviving original Speed Panchro cine lenses command on the used market.

Special editions Beyond the standard two-tone version, Light Lens Lab has offered special editions, and according to reviewers it is these special editions that ship with a matching IROOA-style hood. No further detailed catalogue of factory variants for this model is widely documented in the sources consulted.

Collector Notes The SP II is one of the smaller 50 mm M-mount options available, which helps it avoid rangefinder-window blockage on Leica bodies. Buyers should check focus smoothness, since some samples have been reported to feel stiff, and should confirm whether a given lens includes the screw-in skylight element and a hood, as the standard package does not always come with a hood. The two-tone finish and "rabbit-ear" focus tab are useful identification cues, and the tab can legitimately be present, replaced by a pin, or removed by the owner.