Apex domains cannot have CNAME records.
Question and response
Question
dig sbrownphotography.com. NS
Answer
sbrownphotography.com. 4 NS ns-732.awsdns-27.net.
sbrownphotography.com. 4 NS ns-1945.awsdns-51.co.uk.
sbrownphotography.com. 4 NS ns-1340.awsdns-39.org.
sbrownphotography.com. 4 NS ns-888.awsdns-47.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0