We tried taking the picture several times and this one was its fifth try.
This picture was our fifth time taking it.
ご質問ありがとうございます。
① "We tried taking the picture several times"=「私たちは何度か写真を撮ろうとした」
"and this one was its fifth try."=「そしてこれは5回目に試した写真だよ。」
② "This picture was our fifth time taking it."=「この写真は5回目に撮ったものだよ。」
ご参考になると幸いです。
We took this picture five times before we got it right.
This was the fifth attempt for this picture.
この場合、次のように言うと自然な感じで良いでしょう。
ーWe took this picture five times before we got it right.
「うまく撮れるまでこの写真を5回も撮った」
ここでの to get it right は「きちんと・うまく(写真が)撮れる」ことを言っています。
ーThis was the fifth attempt for this picture.
「これはこの写真の5回目の試みだった」
fifth attempt「5回目の試み」を使って表現できます。
ご参考まで!