Panasonic Lumix G 20mm f/1.7 (II) ASPH. Lens for MFT (Micro Four Thirds), Silver {46}

Panasonic 20mm f/1.7 II: the Micro Four Thirds street standard.

At 26mm long and 87 grams, this lens disappears onto any Micro Four Thirds body. The metal barrel and metal mount give it a solidity that belies its size, and the silver finish pairs naturally with the retro-styled bodies it often rides on. A 46mm filter thread that doesn't rotate on focus keeps polarizers and ND filters predictable to use.

The f/1.7 maximum aperture is the defining spec here. On a Micro Four Thirds sensor, it pulls in genuine low-light capability without forcing you into slower zooms, and the 7-blade circular aperture diaphragm produces smooth out-of-focus rendering in the background. Two aspherical elements in a 7-element, 5-group formula keep the optical design compact while controlling distortion across the frame. Minimum focus sits at 0.20 meters, close enough for tight product shots or food details. Autofocus is handled by a micromotor with full-time manual override, so you can reach in and adjust focus at any point without switching modes.

This is a proven 40mm-equivalent prime that has stayed relevant across more than a decade of Micro Four Thirds body releases. For the price point at which these trade on the used market, it remains one of the more practical fast primes in the system.

Who It's For

Street photographers working with compact Lumix or Olympus bodies get a discreet, fast prime in the classic 40mm-equivalent field of view, with an f/1.7 aperture that handles cafes and evening markets without flash. Travel shooters appreciate the 87-gram weight and 26mm profile that adds almost nothing to a bag. Food and product photographers benefit from the 0.20-meter minimum focus distance paired with wide aperture control. Video-oriented hybrid shooters working in available light will find the full-time manual focus override useful for pulling focus mid-shot without fully releasing autofocus mode.

Key Features

• f/1.7 maximum aperture with 7-blade circular diaphragm for smooth bokeh
• 20mm prime on Micro Four Thirds, 40mm equivalent field of view
• 7-element, 5-group design with 2 aspherical elements for compact form
• 0.20-meter minimum focus distance for tight subject isolation
• 46mm filter thread with non-rotating design for stable filter use
• Full-time manual focus override with micromotor autofocus system
• Metal barrel and metal mount in compact 26mm length, 87 grams

FAQ

What's the actual field of view on a Micro Four Thirds body?

The 20mm focal length gives you a 40mm equivalent field of view on MFT's 2x crop factor, making it a standard street and everyday lens rather than a wide-angle.

How close can you focus with this lens?

Minimum focus distance is 0.20 meters, so you can get tight on small subjects like product details or food without extension tubes.

Does the focus ring rotate the filter thread?

No. The 46mm filter thread does not rotate during focus, which keeps polarizers and ND filters stable and predictable to use.

What's the build quality like for the price?

Metal barrel and metal mount throughout, with a solid feel that belies the compact size. The silver finish matches retro-styled Micro Four Thirds bodies naturally.

Can you manually adjust focus while autofocus is active?

Yes. The micromotor system supports full-time manual override, so you can reach in and correct focus at any moment without switching modes.

How does the aperture rendering work?

A 7-blade circular aperture diaphragm produces smooth bokeh in out-of-focus areas, which matters when you're shooting at f/1.7 in daylight.

Is image stabilization built in?

No stabilization in the lens. Stabilization comes from the camera body if your MFT body has it.