Apex domains cannot have CNAME records.
Question and response
Question
dig shackbrothersphotography.com. NS
Answer
shackbrothersphotography.com. 5 NS ns-1971.awsdns-54.co.uk.
shackbrothersphotography.com. 5 NS ns-1180.awsdns-19.org.
shackbrothersphotography.com. 5 NS ns-653.awsdns-17.net.
shackbrothersphotography.com. 5 NS ns-977.awsdns-58.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0