Panasonic Lumix G 25mm f/1.7 vs Panasonic Leica DG Summilux 25mm f/1.4 II
Panasonic Leica DG Summilux 25mm f/1.4 II is 0.3 stops faster at f/1.4 vs f/1.7, giving better low-light performance and shallower depth of field. Panasonic Lumix G 25mm f/1.7 is significantly lighter at 125g vs 195g. Panasonic Lumix G 25mm f/1.7 costs $400 less at $197 vs $597.
Verdict
Panasonic Leica DG Summilux 25mm f/1.4 II is the better choice for low-light and subject separation. Panasonic Lumix G 25mm f/1.7 makes more sense on a budget.
 Panasonic Lumix G 25mm f/1.7 ASPH |  Panasonic Leica DG Summilux 25mm f/1.4 II | |
|---|---|---|
| Buy | Amazon ↗ | Amazon ↗ |
| Brand | Panasonic | Panasonic |
| Type | prime | prime |
| Released | 2015-09 | 2017-09 |
| Focal length | 25mm | 25mm |
| FF equivalent | 50mm | 50mm |
| Max aperture | f/1.7 | f/1.4 |
| Aperture blades | 7 | 7 |
| Autofocus | Stepping Motor | Stepping Motor |
| Min focus distance | 0.25m | 0.3m |
| Max magnification | 0.1x | 0.11x |
| OIS | No | No |
| Dual IS compatible | No | No |
| Weather sealed | No | No |
| Weight | 125g | 195g |
| Dimensions | 52mm × ⌀60.5mm | 54.5mm × ⌀63.4mm |
| Elements / Groups | 9 / 8 | 9 / 7 |
| Price | $149 | $597 |