Stewart said pictures taken by guests were "usually crap" anyway, and called for wedding ceremonies to be technology-free and "completely unplugged".
"Imagine you're in the middle of your wedding ceremony. You're elated," he continued.
"You decide to take a quick glance towards your guests as you're sure they're sharing these happy moments with you, possibly even shedding a tear of their own. What do you see? NO FACES AT ALL AS THEY ARE ALL HIDDEN BEHIND PHONES AND CAMERAS!"
The frustrated photographer begged soon-to-be-married couples to ban technology during their wedding ceremony, giving suggestions of ways to ensure guests get the message - including writing it on a chalkboard, having the celebrant announce it at the start of the ceremony and hiring a plane to write it in the sky.
Stewart finished his open letter by reminding wayward guests just why they were there in the first place.
'They didn't invite you along to take photographs that they probably won't really look at anyway,' Mr Stewart said.
'So guests please, for my sake, and for sake of the two people getting married, leave your cameras at home and put your phones/ipads away."
The rant on Stewart's Facebook page appears to have resonated with many, with more than 90,000 likes. But not everyone is a fan of technology-free nuptials.
During the debut of her Autumn/Winter 2016 bridal collection in New York, Lebanese wedding dress designer Reem Acra sent one key accessory down the catwalk - a bedazzled selfie stick for all those brides who want to Snapchat their own vows.
"Posed pictures can look formal and serious, and the selfie stick will give everyone something to smile about," Acra later explained.
- nzherald.co.nz