Unlawful Gazing Whilst Making Zikr

1. If someone commits a sin whilst doing zikr e.g. he is walking on the street doing zikr of the first kalimah and then he looks at a non mehram who is walking past him, has this person committed kufr?

2. Has this action of unlawful gazing whilst doing zikr taken him out of the fold of Islam or is it just a sin for him to have done this?