Originally posted by creampuff Hey Mark, please don't base your opinion solely based on the tests of one website. As we know, there are sample variations however slight in all lenses and the tests while indicative, relate solely to that particular lens that was tested.
True.
Quote: Check back when you actually own the FA 77mm Limited yourself.
OK, but similarly, do you have the DA70 to compare with to be able to to provide at least one counterexample? Right now, photozone might be only one data point, but it's the only one we have. Seems if you want to refute photozone's conclusion, the burden of proof would be on you to provide at least one additional data point.
Quote: No need to go at length about sharpness wide open contributing to focus speed - that's unsubstantiated bunkum imo and I challenge you to prove it.
Not sure what you are saying here - are you claim sharpness wide open does *not* factor into AF speed? I can't prove it, but I thought that was common knowledge. Do you have references that suggest otherwise?
Quote: I fail to see the point to make the comparison in focusing speed with the DA 70mm
OK, it doens't matter to *you*, but obviously, *someone* is interested, or they wouldn't have asked. And others who own both have reported that the difference *is* noticeable. So I'm not sure why this seems to bother you so much.
Quote: And we all know the build quality of the FA 77mm easily surpasses that of the DA 70.
"Easily"? I don't know about that. I've used the 77 only briefly, and no doubt it's a great lens and very well built, but so are the DA limiteds. I get the sense you've never handled or used the DA70. It's an extremely well-made and high quality lens too.
Quote: The faster maximum aperture definitely helps when focusing, especially in falling light.
No doubt. Could well be that the DA70's focus speed advantage disappears below a certain light level.