Thypoch Ksana 21mm f/3.5 ASPH Ultra-Compact Wide-Angle Prime Lens - Black / Lens Only

The Thypoch Ksana 21mm f/3.5 ASPH is a manual-focus ultra-wide prime built exclusively for Leica M-mount rangefinder cameras, and it is one of the most genuinely pocketable 21mm lenses ever made for the system. At just 27.29mm long and roughly 131g, the all-aluminum barrel adds almost nothing to a Leica M body, so its 90.6-degree diagonal field of view is always with you for travel landscapes, street photography, architecture, and cramped interiors. The lens is rangefinder coupled, with a tactile reminder at 0.7m telling you the coupling has ended so you can switch to live view or an EVF for the final stretch to its 0.5m close-focus limit.

Optically the Ksana 21mm is far more serious than its size suggests. Eight elements in six groups include one aspherical element, two extra-low dispersion (ED) elements, and three high-refractive-index (HRI) elements, a combination that keeps chromatic aberration and distortion low while holding resolution across a full-frame image circle. What sets this wide-angle prime apart is Thypoch's Epoch Coating.73', a deliberately vintage-flavored gold coating that recreates the golden-amber flare of 1970s glass: shoot into the light and you get warm, characterful veiling and ghosting instead of clinical nothing; shoot normally and it renders clean, high-fidelity, true-to-color images.

Handling follows the classic rangefinder playbook. A scalloped focus ring with a crescent focusing tab, an aperture ring running f/3.5 to f/22, and a straight 9-blade iris that draws crisp 18-point sunstars once you stop down to f/4. The slim 39mm (E39) filter thread and 42mm front diameter keep filters small and inexpensive, and the lens comes in a bold Silver or an understated Black finish, with an optional dedicated lens hood bundle that blocks stray side light for extra contrast. Part of the Ksana series, named for the Sanskrit ksana, the eastern concept of the fleeting instant, this is a discreet everyday-carry Leica M wide-angle lens for photographers who want character back in their files.

Features

• Ultra-wide 21mm focal length with a 90.6-degree diagonal angle of view on full-frame M-mount bodies
• Exceptionally compact and light: 27.29mm long and approximately 131g in an all-aluminum barrel
• Epoch Coating.73' gold coating recreates the golden-amber flare and warm veiling of 1970s-era optics while suppressing backlight glare and ghosting
• Advanced 8-element / 6-group optical design using 1 aspherical, 2 ED, and 3 high-refractive-index elements to suppress aberrations
• Straight 9-blade aperture produces crisp 18-point sunstars from f/4
• Rangefinder-coupled manual focus with a scalloped focus ring and crescent focusing tab; tactile reminder at 0.7m marks the end of coupling
• Close focus to 0.5m for tight, spatially dramatic wide-angle compositions
• Slim 39mm (E39) filter thread with a 42mm front diameter
• Offered in Black or Silver, with an optional dedicated lens hood bundle

Technical Specifications

• Focal Length: 21mm
• Maximum Aperture: f/3.5
• Minimum Aperture: f/22
• Lens Mount: Leica M (rangefinder coupled)
• Format Compatibility: Full-Frame
• Angle of View: 90.6 deg diagonal / 80.2 deg horizontal / 58.5 deg vertical
• Optical Design: 8 elements in 6 groups (1 aspherical, 2 ED, 3 high-refractive-index)
• Coating: Epoch Coating.73'
• Diaphragm Blades: 9 (straight)
• Minimum Focus Distance: 0.5m (19.7 in)
• Maximum Magnification: 1:18.9
• Focus Type: Manual focus
• Filter Size: 39mm (E39)
• Front Diameter: 42mm
• Maximum Barrel Diameter: Approx. 57mm
• Length: 27.29mm (approx. 1 in from mount to front edge)
• Weight: Approx. 131g (0.29 lb)
• Barrel Material: Aluminum
• Finishes: Black, Silver

What's Included

• Thypoch Ksana 21mm f/3.5 ASPH Lens
• Lens Front Cap
• Lens Rear Cap
• Dedicated Lens Hood ("With Lens Hood" bundle variants only)