Panasonic's original beloved MFT pancake — the Mark I of the 40mm equiv f/1.7 pancake prime.
The Panasonic Lumix G 20mm f/1.7 ASPH. is the original Mark I of MFT's most beloved pancake prime — providing 40mm equivalent at f/1.7 in near-body-cap dimensions. This Mark I predates the Mark II (ID 1244) with slightly different AF motor.
Same outstanding optical quality as the Mark II — sharp from f/2.8 with pleasant rendering at f/1.7. The 40mm equivalent provides a natural perspective. The Mark I has a slightly slower AF motor than the Mark II update.
Micro Four Thirds mount with 46mm filter thread. Just 87g — near-body-cap. No weather sealing. No OIS. The Mark I established the beloved 20mm f/1.7 as MFT's essential compact prime.
Available used very cheaply — even cheaper than the Mark II. The Mark II (ID 1244) improved AF slightly. Functionally nearly identical. For budget MFT shooters wanting the classic compact pancake. One of MFT's most important lenses.