Question 1

What is the full-frame equivalent of the Panasonic Lumix G 20mm f/1.7 ASPH II?

Accepted Answer

On a Micro Four Thirds camera, the 2x crop factor makes the 20mm focal length equivalent to 40mm in full-frame terms. That puts it right between a classic 35mm and a 50mm — a versatile, natural-feeling perspective for street, travel, and everyday shooting.

Question 2

How is the autofocus on the Panasonic 20mm f1.7 II?

Accepted Answer

The AF on this lens is contrast-detect based, which means it can feel slower compared to phase-detect systems, especially on Olympus bodies. On Panasonic bodies using fully automatic AF modes, it performs noticeably better than when you manually select a focus point. For street and landscape work the speed is generally fine; for fast-moving subjects it helps to use continuous AF modes rather than spot selection.

Question 3

Does the Panasonic 20mm f/1.7 ASPH II work on Olympus and OM System cameras?

Accepted Answer

Yes — the Micro Four Thirds mount is a shared standard, so this lens mounts and autofocuses on any Olympus or OM System body. AF response tends to be slightly slower compared to native Olympus lenses like the M.Zuiko 17mm f/1.8, so if speed is your top priority on an Olympus body, factor that in.

Question 4

What is the difference between the Panasonic 20mm f/1.7 II and the original version?

Accepted Answer

The Mark II version refreshed the external design with a more modern, sleeker finish available in black and silver, and updated the optical coatings. The optical formula itself is very close to the original. Both versions share the same f/1.7 aperture and 20mm focal length, so image quality is comparable — the II is mainly a cosmetic and build refinement.

Question 5

Is the Panasonic 20mm f1.7 good for astrophotography?

Accepted Answer

The f/1.7 aperture makes it a capable option for entry-level astrophotography on a Micro Four Thirds sensor. It lets in significantly more light than slower kit zooms, so you can keep ISO lower or shutter speeds shorter to reduce star trails. Sharpness wide open in the center is excellent; the corners benefit from stopping down slightly to f/2.8 if you want pinpoint stars across the full frame.

Question 6

How does the Panasonic 20mm f/1.7 II compare to the Olympus M.Zuiko 17mm f/1.8?

Accepted Answer

The Olympus M.Zuiko 17mm f/1.8 is slightly wider (34mm equivalent vs 40mm) and has faster, snappier autofocus — especially on Olympus bodies. The Panasonic 20mm f/1.7 II has a marginally faster maximum aperture at f/1.7 vs f/1.8, and its pancake form factor makes it considerably more compact. If you're on a Panasonic body and portability matters most, the 20mm wins; if you shoot on Olympus/OM System and need responsive AF, the 17mm is worth considering.

Question 7

Is buying a used Panasonic 20mm f/1.7 ASPH II worth it?

Accepted Answer

Absolutely — this is a lens that tends to live an easy life on compact mirrorless bodies, so used copies are typically in solid condition. Buying second-hand lets you get into a high-quality pancake prime at a fraction of new pricing. On Camera-tweedehands.nl, every used copy is inspected and comes with a minimum 12 months warranty, so you're covered if anything turns up.

Question 8

What Micro Four Thirds cameras pair best with the Panasonic Lumix G 20mm f/1.7 ASPH II?

Accepted Answer

Any Panasonic Lumix G body pairs naturally — the Panasonic Lumix G9, GX9, or GX80 are popular matches because they complement the compact pancake form factor. The lens also works well on Olympus OM-D or PEN series bodies, though AF may be slightly less snappy. If you're building a small travel kit, pairing this lens with a slim Lumix body keeps the whole setup genuinely pocketable.

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