小弟想參加國外攝影比賽需要下標題 街拍巧妙迷人之處 在於.... 那晚從觀景窗 過往來去的人群身影中 與將會老去的自己相遇 這句跪求臉書大神幫忙翻譯成英文?

Snap shot on the street invokes thoughts: Through the viewfinder, in between the shadows of people passing, meeting the aging self in the future.

嘗試配合你的原文意思意景，但翻譯或有所失。

另外這"標題"也太長了吧！

不如嘗試簡化你的意思為：
Seeing myself in time passes.

假如按畫面言說你看出的意義：
Me Aged (In the Tunnel of Time)

或者只是一句
Time To Come
或
Me To Be
[含意是"看見"將來的"我"，不是寫明，是意會]

The translation from C/E:-
The ingenious charm of street shooting with printed photographic caption are:-
---The night from the view-window passed the scene to the crowded figure whom I met was my aged self alone for the final time.

In my opinion, iit is better to have taking snap shot in the street, then one can watch through the window about the fascinating effects on go and come traffic of shadows of group of people and that'll resemble my old age. Yip