Since no one seems to have tried out this beauty yet, I guess it was up to me, I did get it. Yes, I love it. Just for its looks, heck if it shoots terrible pics, it will still make an impression!! Just having fun folks. It does handle and perform well. I am by no means a professional, just somewhere past beginner. My first shots with it were on a tripod shooting some birds at a feeder. It focuses fast, faster than any other lens I have. Because of its 2.8 aperture, my shutter speed is much faster allowing for sharp photos, (once I post process them, I still shoot in auto mode alot). Setting WB to cloudy does help with color balance on a sunny day and I have set my sharpness setting to high just because I do not like to post process.
Anyway I like the lens, I will let you know if I have any gripes with it in the future.
Many people report intermittent AF lockup problems with this lens on newer Nikon bodies (N80, D100). Sigma apparently has a fix (chip replacement), but some people report that the problem still occurs. I was wondering if the newer Sigma lenses have completely eliminated this problem. The problem apparently most often occurs in low light/contrast situations.
I did test the lens on a N80 and yes, it would just quit focusing at some point. Removing and reseating the lens reinialized the focusing and all was well. Sigma states in the directions that come with the lens certain models will not AF in the Nikon line. They do say it will work with the F5, F4 series, N70, F90S, F90, and Proneia 600 and all others manual focus only. However with my D100, so far it has worked perfectly. Lets hope it continues to do so. I will contact Sigma support and see if they do have an update or fix for this problem.
I have the Sigma 70-200 HSM and yes it stops focusing on both my D100 and my N80. Removing the lens then reattaching is the cure. Very frustrating. Works great on my D1. It's a beautiful lens but because of this problem I couldn't recommend it. -Mike
Some of the best shots are from the interstate and you can't stop there
Mine only arrived a couple of days ago, and it has locked up on my D100 two or three times since then. However, I find that simply switching the camera off and then on again is sufficient to get it working - I haven't needed to remove and reattach the lens.
This seems like it would be sort of annoying. With the D100 isn't there the additional danger of losing photos in the buffer, since when the camera is switched off it simply discards the buffer contents?
Yes, you would have to wait for the buffer to empty before switching off if you don't want to lose anything.
And yes, it is annoying. I'm not sure yet how often it is going to happen under normal circumstances - the suggestion I have heard is that it tends only to happen in low light/contrast situations. As I've only just got mine, and the weather has been appalling where I am for the last few days I've only really been trying the lens out indoors. My house is quite dimly lit, so it may be that outside in good daylight it will rarely happen. I'll have to wait and see.