Ultracompact Primes: What They Are and Who They Suit
Ultracompact prime lenses are fixed‑focal‑length lenses designed to be significantly smaller and lighter than conventional primes or zooms while still delivering high optical quality and practical focusing features for everyday and specialist photography. In practice, they aim to build a minimalist camera setup that reduces gear size and weight without limiting creative options, especially for travel, street, portrait, and close‑up work.
If you want a dependable telephoto prime that already exists and fits neatly into M-mount photography, the Voigtländer APO-Lanthar 90mm f/4 Close Focus is the clear choice. It is a finished, apochromatic lens, small enough not to dominate a rangefinder body yet long enough for serious portrait and detail work. In contrast, Panasonic’s patented L-mount ultracompact macro lens with a collapsible barrel is still only a concept on paper, but it points to a future where an ultracompact macro lens can fold flat in the bag while offering different distance scales for normal and macro shooting. Choose Voigtländer if you need a proven tool now; watch Panasonic if you can wait for a more radical space-saving macro solution.
Voigtländer 90mm f/4 M-Mount: Telephoto Precision in a Tiny Body
The Voigtländer 90mm prime makes a strong case that compact prime lenses no longer have to feel compromised for telephoto work. The APO-Lanthar 90mm f/4 Close Focus is described as “an impressively compact and lightweight 90mm telephoto lens for Leica M-Mount cameras,” with a diameter of 53mm and length of 54.8mm. At 235g, it is far lighter than many legacy 90mm rangefinder lenses while still covering a full-frame image circle.
Optically, its apochromatic construction with eight elements in six groups is designed to “thoroughly eliminate” axial chromatic aberrations, aided by extensive use of abnormal partial dispersion glass. A 10-bladed aperture promises smooth out-of-focus rendering, and the 0.5m close-focus limit yields a 0.28x magnification, edging into near-macro territory. At around USD 640 (approx. ₱36,000), this is a specialist tool rather than a budget lens, but for photographers invested in M-mount photography or adapting M glass to mirrorless, it offers a rare blend of portability and precision.
| Spec | Voigtländer APO-Lanthar 90mm f/4 Close Focus | Panasonic Collapsible L-Mount Macro (Patent) |
|---|---|---|
| Mount type | M-mount (VM), adaptable to full-frame mirrorless | L-mount macro concept |
| Focal length | 90mm telephoto prime | Not specified; macro-oriented prime |
| Maximum aperture | f/4 | f/2.8 in patent diagrams |
| Optical design | 8 elements in 6 groups, apochromatic with abnormal partial dispersion glass | Optical formula not the focus of patent |
| Closest focus distance | 0.5m (1.6 ft) with live view; 0.7m rangefinder-coupled | Macro mode with dedicated distance scale (exact distance not stated) |
| Max magnification | 0.28x (beyond 1:4 macro) | Macro lens; ratio not specified |
| Barrel design | Fixed, compact barrel (53mm diameter, 54.8mm length) | Collapsible barrel with retract/normal/macro positions |
| Weight | 235g (8.3 oz) | Not specified; patent indicates compact length when retracted |
| Filter thread | 43mm | Not specified |
| Price / status | Around USD 640 (approx. ₱36,000), shipping from August | Patent stage; no product or price announced |
Panasonic’s Collapsible L-Mount Macro: A Blueprint for Space-Saving Design
Panasonic’s patent points toward a different kind of ultracompact macro lens, one that shrinks in the bag but expands in capability. The design describes “a small prime lens with an f/2.8 maximum aperture” that uses a collapsing barrel to suppress lens length when not in use. Unlike older collapsible kit zooms that must be extended simply to shoot, this concept adds a third ring behind the focus and aperture rings that switches between Retract, Normal, and Macro modes.
In normal shooting, the barrel extends and reveals a first distance scale. Switch to macro, and the lens extends further, showing a second, dedicated macro distance scale while hiding the first. When retracted, neither scale is visible, and the overall length appears shorter than the lens diameter, underlining its compact intent. The patent text explains that the aim is “to provide a lens barrel that displays different information depending on the shooting mode and can suppress the size of the lens barrel in the optical axis direction when not shooting.” For L-mount users, this could become an ideal foundation for a minimalist camera setup focused on close-up and everyday work.
Which System Better Serves a Minimalist Prime Kit?
Both of these compact prime lenses reflect a shift away from bulky zoom systems toward leaner, more focused kits. The Voigtländer 90mm prime favors photographers who want a known quantity: precise telephoto rendering, reliable close-focus performance, and proven mechanical quality in a small, dense package that integrates neatly with M-mount photography and adapts well to mirrorless bodies. Its near-macro 0.28x magnification widens its use beyond portraits into detail shots and product work without the bulk of a dedicated macro.
Panasonic’s L-mount macro concept instead targets flexibility and space efficiency. Collapsing the lens until it is shorter than its own diameter signals how far an ultracompact macro lens could go for travel and hybrid shooters who want macro capability without a large barrel on the camera all day. If realized, it would encourage L-mount users to build a minimalist camera setup anchored by a single macro-capable prime, while the Voigtländer appeals to those ready to invest now in a specialized telephoto prime with a clear price and spec sheet.
Buy if / Skip if
- Buy the Voigtländer APO-Lanthar 90mm f/4 Close Focus if you shoot portraits or detail work on M-mount or adapted mirrorless bodies and want a compact 90mm telephoto with near-macro 0.28x magnification.
- Skip the Voigtländer APO-Lanthar 90mm f/4 Close Focus if you need a faster portrait lens than f/4 or are not ready to spend around USD 640 (approx. ₱36,000) on a specialist prime.
- Buy the Panasonic collapsible L-mount macro (when available) if you shoot L-mount and value an ultracompact macro lens that collapses for travel yet offers dedicated distance scales for normal and macro modes.
- Skip the Panasonic collapsible L-mount macro concept if you need a macro lens immediately, since it exists only as a patent with no confirmed product or price.
