"They Thought I Was A Jumper." @Travis Jensen.

If you live in a city, the people that you meet when walking down the street are often great photo subjects.

But if you, like me, have a hard time getting decent shots with your iPhone of the woman with the cascade of facial tattoos you pass every day on your way to work, check out a free workshop at San Francisco’s Apple store this Sunday.

Brad Evans and Travis Jensen will teach you how to add some street cred to your everyday iPhone photos. They’re a pair of veteran urban shutterbugs who teamed up for #iSnapSF Field Journal, which showcases 42 images from thousands snapped on the streets of San Francisco using the iPhone 4 and the Hipstamatic app. (If you can’t catch the workshop, stay tuned for Cult of Mac’s interview with Jensen for some great iPhone photography tips.)