Assertion: telescope's system | /r/HasProperty | desired for practical purposes
Facets:
value: with the purpose
type: PURPOSE
value: in astrophotography
type: LOCATION
value: often
type: TEMPORAL
Source sentences:
text: A fast system is often desired for practical purposes in astrophotography with the purpose of gathering more photons in a given time period than a slower system, allowing time lapsed photography to process the result faster.