Thypoch Eureka 50mm F2

Focal length: 50 mm
Aperture: f/2
Weight: 120 g
Filter diameter: 36 mm
Min. focus distance: 90 cm
Length: 41.2 mm

Overview

The Thypoch Eureka 50mm F2 is a collapsible manual-focus full-frame normal lens for Leica M mount. It is the first lens of Thypoch's Eureka series and was already reviewed in spring 2024. It targets users who want a compact 50mm that shrinks further when stored.

Optical design

Thypoch specifies 6 elements in 4 groups, with an ED element and a high-refractive-index element, plus multi-layer coatings that the company says vary in reflectivity. The aperture has 12 blades and runs from F2 to F16. The minimum focusing distance is 0.9 m. The page does not give the angle of view or the maximum magnification.

Focusing and handling

Focusing is manual. The lens collapses: it measures 41.2 mm before collapsing and 27 mm after collapsing, according to Thypoch, so it extends to working length for use. The collapsible design follows classic retractable lenses. The page does not describe the aperture ring in detail.

Build and size

The front diameter is 35.9 mm and the filter thread is A36. Thypoch lists two versions: a Lite version at about 120 g and a Classic version at about 218 g. The page describes an aluminum alloy structure with an anodized silver exterior and a silver chrome brass construction, which likely corresponds to the weight difference between the two versions.

Where it fits

In the Leica M segment of the database, compact 50mm lenses include the Leica Summarit-M 50mm F2.4 ASPH at 190 g, the Leica Summarit-M 50mm f/2.5, the Voigtländer 50mm F1.5 Nokton VM II at 255 g, and the Leica APO-Summicron-M 50mm f/2 ASPH. The Eureka in the Lite version is lighter than the Summarit-M F2.4 and the Voigtländer. A faster Thypoch alternative is the Simera 50mm F1.4.

Pros and cons

Pros

Collapsible, 27 mm long when collapsed
About 120 g in the Lite version
F2 aperture with 12 blades
Choice between aluminum (Lite) and brass (Classic)

Cons

Manual focus only
0.9 m minimum focusing distance
Only for Leica M
Must be extended before use

Verdict

The Eureka 50mm F2 is a small, light and collapsible normal lens for Leica M. It suits users who want to carry a 50mm in a pocket.

Technical Specifications

min focal length: 50 mm
max focal length: 50 mm
max f (min zoom): f/2
max f (max zoom): f/2
min. aperture: f/16
Elements: 6
Groups: 4
Weight: 120 g (0.26 lb)
Filter diameter: 36 mm
min focus distance: 90 cm (35.43 in)
Length: 41.2 mm (1.62 in)
Diameter: 35.9 mm (1.41 in)

Simulate depth of field and angle of view

Which cameras does the Thypoch Eureka 50mm F2 fit?

The Thypoch Eureka 50mm F2 fits all Leica M-Mount cameras and covers the full 35 mm format.

Leica M-Mount cameras

Full frame:: Leica M EV1, Leica M11-D, Leica M11-P, Leica M11 Monochrom, Leica M11, Leica M10-R, Leica M10 Monochrom, Leica M-E (Typ 240), Leica M10-P, Leica M10-D, Leica M10, Leica M-D (Typ 262), Leica M (Typ 262), Leica M Monochrom (Typ 246), Leica M-P (Typ 240), Leica M (Typ 240), Leica M-E (Typ 220), Leica M Monochrom (Typ 230), Leica M9-P, Leica M9

With the Leica M-Adapter L the lens can also be used on Leica L-Mount cameras.