No character limit to tweet with images attached in hootsuite used by the photos.
Step-by-step explanation:
Note that characters are being used by the photos. Initially, there was a character limit of 140 characters. Then after research on tweets and user reviews, the twitter comes with the big change of announcing there will be no longer character limit will be applied to the quoted tweets used by the photos. This change has been applied from the mid of the year 2016.