Originally posted by Marc Sabatella Interesting, Keitha - I seem to recall in previous versions of this discussion, you said you never used your 70 any more. I actually considered offering to buy yours from you when you moved, since that was right when I was getting ready to buy one.
There is of course the FA Limited "pixie dust" theory - the indescribable thing people love about the images from the 77 more than 70 (and 43 more than the 40), even aside from the wider aperture. I'm enough of a Neanderthal not to see it: "oog, picture look just like my cat, must be good lens" :-). That's why I didn't mention it in my previous post, but it is pretty commonly observed. Whether it's worth several hundred dollars or not is another matter.
You know, Marc, every time this topic comes up, I switch out whichever one I'm using. Like last month, Jens and I went to Frankfurt, and I took the DA 70, and I got some shots that are (in my opinion) delicious, and I don't see how the FA 77 could have done a better job. In fact, I daresay that with the slower focusing, the 77 wouldn't have done as good a job.
But then after I wrote this, I decided to take the DA 70 out of the bag and replace it with the FA 77. I took it to the forest near my house today, and I took this shot with it:
...and I remembered why I love it so much. I don't think the DA 70 would have quite done this shot the same way. They're two different lenses for me.
You reminded me about another really important consideration: price. I think that, realistically, there are only a very few shots that the 77 can outdo the 70 for - and the same is true the other way around. So it just becomes a matter of what is important to you and just how much you value that.