This is similar to using a basin to catch rain; the larger the opening of the basin, the more rainwater it collects in a given time. The same applies to telescopes.

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!276386~!0#focus ...

Obtained by UB as part of a project to observe last year's total solar eclipse, the telescope will be used for education and outreach.