I just recently got back from a trip that had 5 days in Istanbul, with my primary purpose being there just to walk and take lots of photos.
Absolutely loved Istanbul, and wish I'd had more time. The people were extremely nice, didn't mind having their picture taken, and the street photography was wonderful.
I understand starless' comments above on areas to avoid, but I'd actually recommending going to those areas. In fact, if it's your first time to Istanbul you really must hit those sights. The Blue Mosque, Aya Sophia, the Palace, the New Mosque, Sultanahmet, etc are all great. That said, try to get to them when they first open or shortly before they are going to close to tourists--you'll have less tourists to deal with. I went to the Blue Mosque just after I arrived in Istanbul, on a Sunday afternoon, and it was packed with probably close to 1,000 tourists. But, when back the next morning for sunrise, and then was the third person through the door after they opened (8:30ish), and I basically had the mosque to myself for 20-30 minutes. Incredible!
Other things to see:
- Chora Church. Incredible tile mosaics. Again, get there when it opens and you'll have it to yourself for 20-30 minutes before tour groups start to arrive. Not open every day, so check.
- Second the tip for ferry from Europe to Asia. I took the ferry from the Eminonu to Kadikoy several times, and enjoyed the scenes.
- There is a mosque on the Europe side of the bridge that goes from Europe to Asia; you can get the mosque, the bridge, watch, some crashing waves...very nice.
- Explore as many of the streets in the area radiating out from the Grand Bazaar.
- Taksim Square area, especially at night. There is a huge outdoor shopping center/street, where lots of people go. Make sure to get off that main street, as their are lots of restaurants and bars on the side streets, with good photo opportunities.
Also, be aware that you won't be able to use your trip in most churches or mosques. In fact, quite a few places, when the xray'ed my bag upon entering, actually made me check my tripod and/or GorillaPod. That said, I got very good at laying my cameras on their back and pointing them up at the ceilings to get the shots I wanted.
Even though I just got back, I'm envious that you are about to go. Istanbul has a unique vibe, and is a true mix of East and West.
I will be posting some photos soon (still working on the digital files, and developing the film). There are a few posted on my blog,
www.pixelsandgrain.co/blog as well as some more thoughts on my recent travels and Istanbul. Any more questions, shoot me a PM.
Enjoy your trip.
Jeff