Does anyone have an idea as to why there would be this surprising price difference between the P67 pentaprism (non-TTL) and the TTL prism? (These are KEH prices, and yeah, I could just call them and ask, but I'm in New Zealand and orchestrating a call time is not always convenient.) TTL, EX-EX+ : $89-126 pentaprism, EX-EX+ : $149-165 I have the pentaprism and like it, but am considering getting a TTL prism also. I have read that the pentaprism shows 95% of the negative area, and that the TTL prism shows 90% of the negative area. Seems odd that this one difference would make up such a price difference. Thanks in advance for your replies.