Shadows can be a boon or a hindrance to a photographer. Too much, and you lose your subject to darkness. But use them right, and you can beautifully play with the light/dark dichotomy.
Shoot whatever you want, provided it heavily uses shadows with/as its main subject.
There's a lot of fun to be had with shadows. Depending on the angle of the light and the object casting the shadow, the shape could be really surprising. The experienced among you should definitely enlighten the group with tips in the comments.
1. Submissions need to be your own.
2. Photos need to be taken the week of the contest. (No portfolio linking or it spoils the "challenge" part.)
3. Explain, briefly, the equipment, settings and technique used to snag the shot.
4. Email submissions to firstname.lastname@example.org.
5. Include 800px wide image (100KB or less) AND a 2560x1600 sized in email. (The 800px image is the one judged, so feel free to crop/alter the larger image for wallpaper-sized dimensions.)
Send your best entries by Sunday, March 28st at 11PM Eastern to email@example.com with "Shadows" in the subject line. Save your files as JPGs or GIFs, and use a FirstnameLastnameSHADOWS.jpg (800px) and FirstnameLastnameSHADOWSWALLPAPER.jpg (2560px) naming conventions. Include your shooting summary (camera, lens, ISO, etc) in the body of the email.
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[Lead photo by CatDancing]