It occurs to me that we spend LOTS of $$ on our camera purchases, and why isn't there a company out there that will create a camera to order, like the car companies do. For instance, we each have little things about cameras that we like, such as a tilt/swivel screen, and a self-cleaning sensor, and buttons in easy to use spots, or a large review screen, etc. It just seems that all the possible changeable items about a camera should be available for folks who would like them on their camera, regardless of the brand. Anyone else have this thought? Is this even a reasonable thing to consider?

Roger,
Thank you so much for taking the time to show others how flawed your own thinking is---because YOU OBVIOUSLY DIDN'T UNDERSTAND THE QUESTION THAT I ASKED! This question was not an historical one, as you're trying to make it out to be. The BIG 4 that I listed, Sony, Pentax, Nikon, and Canon are how we know the companies TODAY. And based upon that, I was asking for who had the better name BASED SOLELY UPON the definition of the name they have now (I even asked people to NOT vote because of brand loyalty--remember that?). I gave the definitions for each of these companies based upon a simple search for the names. The first three company names are a combination of two or more names or thoughts. Canon is the only name of the 4 that has a multi-century historical definition in the dictionary. Canon is usually ascribed for the process of determining the authority and originality of the books of the Bible. And "canon" most definitely is a Greek word. If you had bothered to read the entire history of the Canon company, you would have discovered that even they eventually adopted the Romanized spelling (which included the entire Mediterranean area, including Greece) and changed it to Kannon, then Canon. But, again, this was not a history assignment. It was merely an attempt to show exactly what is in a name, as the title of this post clearly indicated. I applaud you for letting us know the beginnings of the company we know today as Canon but you went down a road that we shouldn't have had to go on.

I'm not sure what you mean adjustment ring for aperture.
That lens at 100mm max aperture is f/4.5 minimum aperture is f/32,,at 400mm max ap. is 5.6 and min. ap. is f/40...If you shoot on 400mm and shoot a minimum aperture of f/11 or up to f/40 you will have more in focus..