Still not back from my trip yet and in transit in Istanbul. Sorry for not replying to your PM earlier.... IMHO, they both have their moments when they either excel or make you wonder why you made that decision. I have the 45 degree viewfinder. To be honest, I think I would go for the straight after using the 45 degree viewfinder for a while. The angled viewfinder is easy to use when doing WA and macro (with the 60mm lens on a cropped sensor camera like the D300). Subject acquisition is easy enough and the 45 degree angle ensures that you naturally shoot upwards (which is better for composition in most cases). I love the ability to get low on subjects without any trouble and to get under overhangs and ledges. However, using a longer 105 lens or doing ANY kind of macro greater than 1:1 will frustrate you. I spent so much time hunting for my subjects when using the 105 with an Inon diopter. Even just with the 105mm lens alone proved quite a challenge. If there is a surge, forget it. At times like that, I wished I had bought a straight viewfinder instead. I know that if I do use a straight, I may probably find myself wishing for the angled viewfinders at times.....however, the more natural point and framing of subjects using the straight seems to be much more beneficial. THe downside to the 180 is transportation and handling. It is advised to leave the viewfinder on at all times. The divervision/Fun-in models CAN be self installed easily and removed. However, the retailers advise leaving it on the housing and either pressure testing or diving without the camera for the first dive. The 45 degree viewfinder is a lot smaller and easier to pack.
