The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 65mm F2 DG DN and the Leica 60mm f2.8 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Leica 60mm f2.8 ASPH is the longer of the two lenses at 89mm. The Sigma 65mm F2 DG DN with a length of 75mm, is 14mm shorter. On the other hand, the Sigma 65mm F2 DG DN has a larger diameter of 72mm compared to the Leica 60mm f2.8 ASPH's 68mm diameter.
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Below you can find a scaled side-by-side image of Sigma 65mm F2 DG DN and Leica 60mm f2.8 ASPH to get a better idea of how their sizes compare in real life.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Leica 60mm f2.8 ASPH weighs 320g, 20% (85g) lighter than the Sigma 65mm F2 DG DN's weight of 405g.
Filter Threads
The Sigma 65mm F2 DG DN has a filter size of 62mm whereas the Leica 60mm f2.8 ASPH has a 60mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 65mm F2 DG DN:
And these are the 60mm filters that we recommend for the Leica 60mm f2.8 ASPH:
Lens Mounts
The Sigma 65mm F2 DG DN has the Leica L lens mount whereas the Leica 60mm f2.8 ASPH has the Leica TL lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3, Panasonic S5 II and Panasonic S5 II X for the Leica L Mount and , and for the Leica TL Mount.
Sigma 65mm F2 DG DN is also available in Sony E mount.
Focal Range
Sigma 65mm F2 DG DN is a prime lens with fixed focal lenght of 65mm.
On the other hand, the Leica 60mm f2.8 ASPH is a prime lens with fixed focal lenght of 60mm which has an effective (full-frame 35mm equivalent) focal range of 90mm when used on a APS-C / DX format camera.