Flew said:
Charles,
I just got the complete Kenko set, and my quick test yesterday was a complete bust with the 70-200VR. The blasted combo acted so weird. The zoom acted like a focus control. No matter which tube I used, the 70-200VR would only focus at one focal length, if at all. It totally blew my mind. I borrowed Patrick's Tamron 90mm macro lens today, and the tubes worked extremely well with it, but I wasn't nearly as happy with the them on the VR.
I plan to get a non-zoom macro lens withing the next few weeks, and I think that they will be very useful for extreme close-up shots.
Hope this helps.
Frank (and Charles) -
Your comments are right on - the 70-200VR and extension tube combo does act "weird", at least until you get used to it. The zoom does act as a focus control. But think about it - the same tube on a 60mm, 105mm or 200mm produces three different focus ranges and magnification factors.
I don't understand one comment you made - "No matter which tube I used, the 70-200VR would only focus at one focal length, if at all." Just for fun, I checked my 70-200VR at 70, 105, 135 and 200mm, and got perfect focus and adequate focus range (at least for my purposes) at each focal length. As expected, the range got shorter and closer at the shorter end.
I don't know whether primes of the same lengths would have greater focus range. The best Nikon primes undoubtedly would produce slightly sharper images, but the 70-200VR IMO produces superb images too. It doesn't really get into true macro land, but is fine even for very small flowers and the occasional bee. Nikon's macros of course can do true macro work, and I would love to see what you can do when you add an extension tube to your new macro when you get it.
The great advantage of the lens from my perspective is flexibility. I want to Longwood Gardens with just two lenses (the other was the 17-55DX for scenic shots), the TC-17E II, 12mm and 25mm Kenko tubes, and no tripod (thanks to VR). Outdoors at the Lily Pond and elsewhere, I used the 70-200VR thoughout its normal range and sometimes with the TC-17. Indoors I used to lens by itself and with the tubes (mainly the 12mm). You will see what the lens can do with tubes when I post some of the indoor images.
Bottom line - different strokes for different folks. The 70-200VR is ideal for me.
Gordon