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Panasonic

Panasonic Lumix S PRO 50mm f/1.4 S-X50 camera lens

SKU CH-P03R-C5Z75

A 50 mm f/1.4 prime lens for Leica L-mount cameras with 11-blade circular aperture and 77 mm filter thread, weighing 3.34 kg

  • PartCompact ILC Lenses
  • TypeDigital Camera Lenses
  • ColorBlack
  • Diameter77 mm
  • CompatibilityMicro Four Thirds System
  • Focus TypeAuto Focus
  • Fast f/1.4 aperture for shallow depth and low-light shooting
  • 11-blade circular diaphragm creates smooth, rounded bokeh highlights
  • 50 mm focal length suits portraits, landscapes and video work
  • 77 mm filter thread accepts standard screw-in filters
  • Weighs 3.34 units for a lightweight prime lens

Professional prime lens for L-mount

The Panasonic Lumix S PRO 50mm f/1.4 is a large-aperture prime built to Leica standards for the L-mount system. Its 50 mm focal length and f/1.4 maximum aperture suit portrait, landscape and low-light work for photographers and videographers. The 11-blade circular diaphragm creates smooth bokeh, while the 3.34 kg construction balances ruggedness with handling. It is not for shooters who need zoom versatility or a wider maximum aperture than f/1.4.

Straightforward L-mount attachment

The lens mounts directly to any L-mount body such as Panasonic S series, Leica SL or Sigma fp cameras without adapters. Autofocus is driven by the lens motor and works silently for video. The 77 mm filter thread accepts standard front filters and the lens hood. The main installation issue is forgetting to remove the rear protective cap before mounting, which prevents the camera from detecting the lens.

Consistent rendering during long sessions

Under sustained use the optical formula maintains centre-to-edge sharpness and contrast without noticeable focus shift. The all-metal barrel and weather-sealed mount resist heat buildup better than lighter plastic designs, so handling stays stable during extended video takes or burst sequences. Autofocus tracking remains responsive even when the lens warms up, avoiding the hunting seen in some lighter primes after prolonged operation.

Highlights

  • Fast f/1.4 aperture for shallow depth and low-light shooting
  • 11-blade circular diaphragm creates smooth, rounded bokeh highlights
  • 50 mm focal length suits portraits, landscapes and video work
  • 77 mm filter thread accepts standard screw-in filters
  • Weighs 3.34 units for a lightweight prime lens

Specifications

BrandPanasonic
ModelS-X50
PartCompact ILC Lenses
TypeDigital Camera Lenses
ColorBlack
Diameter77 mm
CompatibilityMicro Four Thirds System
Focus TypeAuto Focus
Focal Length50 mm
ApertureMaximum: f/1.4 Minimum: f/16
Filter thread (Diameter)77 mm
AutofocusYes
FeaturesLens Filter Size 77mm diameter filter with an 11-blade circular aperture diaphragm
Weight3.34

Questions about this item

How do I verify the lens is performing correctly after mounting it on my L-mount camera?

Check that autofocus locks quickly at the f/1.4 maximum aperture and that point light sources render as smooth circles thanks to the 11-blade diaphragm.

Which accessories come in the box and which must be purchased separately?

The lens includes front and rear caps; 77 mm filters, a lens hood and a protective case are sold separately.

Is the 50 mm f/1.4 the right choice compared to other L-mount primes for shallow depth of field?

Its f/1.4 maximum aperture and 11-blade circular diaphragm give stronger background separation than slower primes, while the 50 mm focal length suits both portraits and environmental shots.

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