Assertion: lens | /r/HasProperty | with maximum aperture of 1:3.6
Facets:
value: compared to previous lenses
type: OTHER
value: faster
type: MANNER
value: firstly
type: MANNER
Source sentences:
text: Petzval's lens established two new features: firstly, it was faster compared to previous lenses, with a maximum aperture of 1:3.6.