Here's how the two cameras compare:
Sensor — this is where they differ:
- acA4112-20um uses the Sony IMX304LLR sensor. docs.basle...docs.baslerweb.com ↗“Sony IMX304LLR”
- acA4112-30um uses the Sony IMX253LLR sensor. docs.basle...docs.baslerweb.com ↗“Sony IMX253LLR”
Resolution — identical: Both cameras deliver 4112 × 3008 pixels. docs.basle... +1docs.baslerweb.com ↗“3008”docs.baslerweb.com ↗“3008”
Interface — identical: Both are USB 3.0 (SuperSpeed), nominal max. 5 Gbit/s. docs.basle... +1docs.baslerweb.com ↗“USB 3.0, nominal max. 5 Gbit/s (SuperSpeed)”docs.baslerweb.com ↗“USB 3.0, nominal max. 5 Gbit/s (SuperSpeed)”
Both use a global shutter and share the same mechanical dimensions (40 × 30 × 35.8 mm). The practical difference beyond the sensor is frame rate: the acA4112-30um runs at 30.9 fps at default settings versus 23.4 fps for the acA4112-20um. docs.basle... +1docs.baslerweb.com ↗“23.4”docs.baslerweb.com ↗“30.9”
Details for each model: acA4112-20um and acA4112-30um.