Usually, you would want the sun at your back or at the very least not aiming directly into your lens. I wrote about this a while back and enjoyed revisiting this technique in Paris. I think that lens designers would be upset about my love for flare. They go to great lengths and expense to design lenses that resist flare and here I am trying to exploit it.
When purposely shooting for flare you are likely going to lose quite a bit of dynamic range. That’s just one of the tradeoffs, but shooting raw with modern sensors allows you to recapture much of what you think might be lost.
SeattleSteve.me 
Hi Steve, I have had a look to your posts and found this interesting story. I use my Summicron M2,0/50 to get the same results, because I learned that this Summicron has a “flare problem” due to its construction. For me it is nearly unpredictable when it happens but it happens. So I changed to black/white with this lens, for what it is perfect – b/w picture with flare look fantastic, I think.
Best regards, Olaf
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Thanks for your thoughts, Olaf. I have come to embrace flare as a fun characteristic. B/W with flare looks great! Cheers!
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