Which of the following is NOT mentioned about the single-lens reflex?

M: Good afternoon, madam.
W: Good afternoon. I’d like to buy a camera.
M: We have all kinds of cameras here, madam. What sorts of camera are you thinking you are buying?
W: Well, I don’t know anything about cameras. But my friend tells me that 35-millimeter cameras are the best.
M: Well, they are certainly the much popular. Would you like a rangefinder type or a single-lens reflex?
W: What’s the difference?
M: With a single-lens reflex, you actually look through the lens when you are taking a photo. So you can see exactly what you are taking.
W: That seems a good idea.
M: Yes, focusing is easier, too. Try this one. It’s a good mate.
W: Yes, I see what you mean. The image is very clear and bright.
M: That’s right. Moreover, you can use a number of different lenses. Let me put a telephoto lens on for you to try.
W: My world! That’s very good. I can see the people across the street as if they are inside the shop!
M: Being able to change the lens is very important, in my opinion. You can’t do that with most rangefinder cameras though they smaller and cheaper.
W: How much is this camera?
M: The list price is 5,000. But I can let you have it for 4,500.
W: That’s far too much! Did you say that rangefinder cameras are cheaper?
M: Yes, they are much cheaper.
W: Good! Show me some, please.