AF Speed under normal conditions?
1850457
I have also the XF18-55. The XF27 is a little slower than the 18-55 and a little less accurate when tries to find focus (under difficult and not contrasty conditions). But in general i'm happy with this lens, is not for sports but for street photography for example is fine. Also is very sharp and small and with my X-E2 i can take it everywhere.
1850458
I found on my X-A1 that the focusing is pretty fast though it does Hunt a bit. hunting may be less on cameras with phase detection.
1850459
The af speed depends on the camera being used. The speed was ok with the xe-1 under normal conditions. I would believe better with xe-2 and xt. F2.8 isn't that fast for indoors.
1850460
AF with the lens is very reactive, nothing to worry about. Excellent lens from every angle. I use it all the time.
1850461
I do street photography with this lens. No problem in most lighting conditions. Can hunt with low light on my X-M1, but much better with X-E2 (update your firmware). No worse than my other Fuji lenses.
1850462
It isn't very fast but it is accurate, with the front element remaining fixed. Nevertheless, AF will hunt about when lighting is low and in cases of very low lighting the lens is unable to focus.
1037323
I'm not sure if I understand your concern of DOF issue with 1.8, but you can always change your aperture to 8~9 and it will show details of your back-ground. But If I were you I would take a 18-200mm instead. covering wide to fairly good zoom unless you are planning to do dark inside building pics. That's just my 2 cents.
2010588
If you have certain lenses the focus ring pulls forward and back to enable Manual focus - if you can see a distance scale on the lens , you are in MF. And you might think AF doesn't work - just push the focus ring forward to get into AF
1903049
i use this exclusively for NON-AI, AI and AIS. I haven't even tried with and Af-S. i'd say it's down to manufacture or user error. I'd send it back. And frankly you sound like you know what you're doing.Good luck!
526618
Much faster than our previous Canon. It seems instantaneous. I believe there is a data point within the Specifications that actually documents it.
1869661
That is only true if it is set on a small aperture. I'd say f/11 and up. Here is the proof, sort of in reverse:http://www.pbase.com/amoxtli/image/106429061
1850441
I used 28-135 for more than 8 years and was happy with it. Recently, I purchased 24-105 and I was very surprised. AF is fast, image is clear, IS is working very good. 24-105 is excellent lens and much better than 28-135.
2264762
Are you talking about how short an exposure you can get or how quick between pictures. I haven't been limited by shutter speed in high or low light situations, but if you are trying to take actions pictures the time between frames probably isn't what you are looking for.
575774
Well I think 1.8 is ultra fast (vs 4), so I would use it in a particular situation if I had that lens.
1165890
As I under stand it, If you are photographing events which you expect to be moving your camera allot, sports, kids running and playing etc., you use the "Active" setting. If you are doing more still photography you would use normal. It's basically a motion sensitivity adjustment for the expected amount of camera movement. I always keep mine on "Active" and I seem to do O.K. in every type of situation.
503710
I have the 12-60 and the EM1, and it's quick in good light, can hunt a bit in low. I don't have my E-5 anymore, but my gut tells me it is a tiny bit bit slower than the E-5 in good light - nothing to get worked up about. I haven't tried cdaf. the 4/3 40-150 seems decently quick as well.
1250082
Yes, according to the manufacturers information there are different speeds. 1/1600-1 sec. (when ISO sensitivity set to Auto). 1/4000 sec. (maximum speed during high-speed continuous shooting). 4 sec. (when scene mode is set to Fireworks show).
1116913
I think you have your answer from others here, but I thought I would chime in and call out that not only is it better and faster it locks on faster than my 1D Mark IV in low light conditions. There are a lot of tweak able settings, but I haven't found the AI servo to be as fast or reliable as the 1D, of course, that is mostly because I want the extra ~4fps and haven't fiddled enough with the AF settings. Even better than the AF system though is how gorgeous the photos that come out of the Mark III are. Incredible, even at silly ISO settings (12800+). You will love it if you get one.
479375
Usually that means the shutter speed was to set below 250 sec. Increase your ASA to 6400 in low light conditions and if shooting in available light, usually tungsten, change from the auto white balance to the tungsten setting in the manual setting dial in at 250 sec. shutter speed and 2.8 aperture and respond to this post with your results, Thank you!
1789857
yes, you get light gathering of 1.2 lens, but depth of field of a 2.8 lens @ f/1.2, so you get an extra f stop of speed without loosing depth of field over a full frame camera
900470
I would. I've found that when using AF I'm able to tell through the viewfinder how accurate it really is. On several occasions I've been able to correct my focus when AF focuses at the wrong depth because I can clearly see where the focus is.
839581
Do not overlook the need to turn OFF the Focus Check setting! Realize that the default setting slows the AF down markedly. If this setting is left on, it will result in wandering focus ...