That is incorrect. The famous Hubble Ultra Deep Field image[1] took 11.3 days of imaging spread over four months (because of high demand to use Hubble). Howeve

That is incorrect. The famous Hubble Ultra Deep Field image[1] took 11.3 days of imaging spread over four months (because of high demand to use Hubble). However, that is a different part of the sky. The Hubble image shown here was taken as part of RELICS[2], a survey of images to find good candidates for JWST to image, and was only exposed for 1.7 hours (5 orbits at ~20 minutes each), compared to JWST's exposure time of 12.5 hours. So comparisons between between Hubble and JWST for that particular shot are not fair to Hubble. [1]https://esahubble.org/images/heic0611b/ https://esahubble.org/images/heic0611b/ [2]https://archive.stsci.edu/prepds/relics/ https://archive.stsci.edu/prepds/relics/