Mine is whoever said, "A good photograph requires knowing where to stand." I might add that a good photograph also requires knowing when to stand there. Was this Ansel Adams? I couldn't find a web reference for the original comment.

The photos of the Japanese sneak attack on Pearl Harbor are priceless.

New technology has to be defined in terms of how it will or will not help you take the type pictures you take. I'm very happy with the 7D although its older type memory disk is an occasional irritation. I also can't transfer images without a cable. That said, I don't really need the "new technology." All my lenses work with the 7D, including the 10-22 mm wide-angle (which won't fit the full-frame cameras).

I find that visiting places I've never been to before helps me see photo opportunities

The problem occurs when you use extension tubes that have no electronics in them.

I'd take both

When looking at the set of "four" there are missing lines on the lower right portions of the middle two bars. I think this creates the visual ambiguity that lets your eyes see the set of three or the set of four.

From what I've read recently the nature of the subject matter's reflected light is important to the effectiveness of a polarizing filter. On some occasions you can turn and turn the filter and nothing seems to happen to dim the unwanted reflections or make the sky bluer. When the polarizing filter is not working effectively from one location on the street, I sometimes try another location to change the angle of the light (usually the existing daylight in my case) reaching the camera. Sometimes this works, sometimes it doesn't, and sometimes it is just not practical to do. And like lots of other photographic equipment, polarizing filters can cost more or cost less depending on their quality and design.

I use a longer lens so I can be further away. I try to fit into the street scene. I don't start taking pictures immediately upon getting to some location. If there is somewhere to sit down I sit down. The best time is when other people are taking pictures. When the pictures are just for my viewing I don't worry. But when they are to be posted for the whole world to see I try not to intrude too much in people's personal lives. I know the law is that when you are in public you are giving people permission to photograph you as long as the picture isn't used to sell products and so on. Then you need a model release. But if the photo shows a person's identity closely I often posterize it with Photoshop or do something else to avoid intruding too much. In the end I don't take very many close pictures of people on the street.

I have a 7D and like it for both the purposes you mention. The only irritation for me is that is uses the old type memory cards, not the newer, smaller ones you can just slip into a slot on your computer. I connect to my computer using a cable to my camera. I find the card readers are not reliable because the numerous pins get easily bent.

Arf.

Do you mean February, 2015?

I sometimes use a Canon 100-400mm lens. It is not the perfect walk-around lens because the low end is too large.

No! It's up to interested people to learn. If they don't t that's their choice.

If you like what you do you'll never work a day in your life :)