Omnar Bertele 50mm 𝒇2 MC FLB is a modern recreation of the classic Jena lens formula from 1934. Omnar Bertele 50mm 𝒇2 MC FLB is a modern recreation of the classic Jena lens formula from 1934.

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  • Dmitri Jun 9, ‘25

    Omnar Bertele 50mm 𝒇2 MC FLB is a modern recreation of the classic Jena lens formula from 1934.

    The founders, Chris (of Skyllaney Opto-Mechanics) and Hamish (of 35mmc.com), have been making premium machined brass rehousings of classic lenses since 2021. Bertele is their first project to utilize an advanced focus correction mechanism (FLB) with new glass elements crafted using a 91-year-old formula by Dr. Ludwig Bertele. Designed, manufactured, hand-finished, and hand-assembled in the UK.

    The Omnar founders’ love for the Bertele formula had originally brought them together. But unlike their other creations (see: analog.cafe/comments/l1rc), the nearly century-old glass is not suitable for rehousing. The original design suffers from degraded coating, easily-scratchable glass, and focus recompilation errors that yield soft images at medium apertures and near focus.

    Omnar Bertele 50mm 𝒇2 MC FLB resolves these recompilation errors using the Floating Lens Block design, which mechanically nudges the elements into an optimal position for tack-sharp focus and smooth, classic bokeh, without any changes to the original lens formula. The multi-coated glass elements are made anew, encased in a premium metal chassis for the Leica M-Mount (which helps further resolve the close-focus recompilation).

    Bertele 50mm 𝒇2 MC FLB, starting at £2750, will be available at

    omnarlenses.com/omnar-bert…

    This is a limited run of 30 lenses total.

    #editorial🔥 #gas

  • Dmitri Jun 9, ‘25

    Here’s an example of a precision focus with the Bertele 50mm 𝒇2 MC FLB lens that wouldn’t be otherwise possible to get accurately with the vintage lens.

  • Dmitri Jun 9, ‘25

    One more example of the shalow depth of field focus.

  • Dmitri Jun 9, ‘25

    Bertele 50mm 𝒇2 MC FLB has a large enough image circle for medium format digital cameras like Hasselblad XCD and Fuji GFX camera series.

  • Dmitri Jun 9, ‘25

    There may be slight vignetting on medium format sensors until the lens is stopped down. This is the outline of the frame boundaries with this lens.

  • Dmitri Jun 9, ‘25

    Full lens specs:

    Optical construction: 6 elements in 3 groups, Floating Lens Block assisted.

    Filter size: E39.

    Weight: 260g/9.2oz.

    Protrusion off camera: 35mm/1.4”.

    Coatings: multi-coated — Sapphire Blue and Amethyst Violet.

    RF coupling: 0.7m — infinity.

    Construction: all brass helicoid.

    Preorder and more info: omnarlenses.com/omnar-bert…