Does blackmagic 4k performace auto focus or is it all manual ?
251734
It has auto focus, but the auto focus is not insanely fast. When I'm using it I never use auto focus I just rely on the focus peaking, but you can use auto focus on the camera. But only with lenses that have auto focus.
251735
It can auto focus at one point before recording as long as you use AF lens, but you have to manually focus after.
251736
It does have a 1 button "auto focus" which will focus automatically. Not smooth, but it works.
251737
You can touch the screen and it will focus on what you touch. Other than that, it's all manual.
317567
It is both manual and auto focus in both still image and video modes but in lowish light in video mode it hunts a lot, getting the focus wrong more often than not but thats a function of the camera. Not the lens. That said, it's an excellent lens but it should noted that it does not have image stabilization.
1908911
Is your Blackmagic an EF mount? If so, it should work. The mounting to the lens can be really tight - like "I'm concerned I might break something" tight. Double check you are putting it on right, and twist just a bit harder.It's hard to get off too. I believe there are youtube vids showing how to do this - I suggest searching.
1485453
Your auto focus will be reeeaaaally slow. Cant speak for 5d3 but on 1ds3 you'll be faster focusing with hand.
899760
I have a D3200 and autofocus is fast to f / 4, it takes much less to focus, and the VR lens does not work with it
664803
I have the 1.4 Tamrom TC and it works reasonably well. It slows the lens down one step, and there might be a slight image degradation, but it does autofocus. Good luck!
314958
yes it works, but auto focus sometimes hunts a lot, especially if the light is limited
1080092
Definitely turn ON your AF-assist Beam. This is a beam of light that helps your camera to auto focus more accurately. Try evaluative metering instead of the center weighted avg. Evaluative metering will cover a greater range of complex lighting situations. M3 will allow you to focus better without camera shake in the zoom capacity up to 46x digital (pg 81 of your manual) but your pixels are greatly reduced so playback and prints at a larger size will be compromised. Unless you really need to get clear photos at a great distance stick with L superfine as mentioned above. Try keeping the ISO in Auto. And please comment again so we know if anything has worked for you. Definitely turn ON your AF-assist Beam. This is a beam of light that helps your camera to auto focus more accurately. Try evaluative metering instead of the center weighted avg. Evaluative metering will cover a greater range of complex lighting situations. M3 will allow you to focus better without camera shake in the zoom capacity up to 46x digital (pg 81 of your manual) but your pixels are greatly reduced so playback and prints at a larger size will be compromised. Unless you really need to get clear photos at a great distance stick with L superfine as mentioned above. Try keeping the ISO... » Read More Definitely turn ON your AF-assist Beam. This is a beam of light that helps your camera to auto focus more accurately. Try evaluative metering instead of the center weighted avg. Evaluative metering will cover a greater range of complex lighting situations. M3 will allow you to focus better without camera shake in the zoom capacity up to 46x digital (pg 81 of your manual) but your pixels are greatly reduced so playback and prints at a larger size will be compromised. Unless you really need to get clear photos at a great distance stick with L superfine as mentioned above. Try keeping the ISO in Auto. And please comment again so we know if anything has worked for you. « Show Less
996369
I tried my camera right before answering your question. If there is decent light, it auto focuses, but sometimes it takes a little while. You can zoom as you film, but it focuses faster and with more clarity when using the lower optical zoom range. I still love this camera... However, if you decide to buy it, make sure you get the fastest memory card for HD digital cameras (it only take the tiny ones), otherwise it is too slow taking pictures.
1968817
Yes, it is manual. The price wouldnt let it be auto focus. So it is not easy to get a clear image easily. It takes some time and a little practice to focus correctly. Besides you need a good tripode so the camera don't move because the lense is quite heavy. Anyway, the results are ok. I use it with a Nikon D 90
1748740
I have no luck in auto focus mode, but if you set it for a regular picture it should be ok.
2006132
Its manual focus works fine for me. I have the a7r and have had no problems using manual focus.
951871
Yes it does. Open the camera app and click on the gear in the lower left. Scroll down to Focus mode and you can select either Auto focus or Macro.
85183
Yes, and it's better than that. Depending on the lens you are using, you can go autofocus, or manual with the aid of the "green dot" in the viewfinder. The focus indicator light works with most lenses I use when I have it on manual focus, so you know if you are actually in focus. Not much excuse for out of focus photos with this setup.
363959
Short answer, yes. When in video mode auto focus, AF and AE are working. There is no manual focus. Even in camera mode there is no manual movement of the lens other than depressing the shutter button halfway. An additional note on video, when you zoom in there may be some changes in focus and the synchronization between focusing and zooming may cause momentary blurriness if the zoom is faster than the focus speed. You learn to avoid this. Also, keep in mind that your effective range of zoom in video is about half as much as camera because at some point you will be out of focus. There are always limits to what any lens system can. This last issue is not really important as you could not possibly hand hold the camera at max zoom in video to capture anything without excessive motion.
82208
Yes. Assuming you are talking about doing a video recording. Once you uncheck the "Auto Focus" control option you will have the ability to do a manual focus with the slider.
740233
The light is spread onto 4x the surface. That is why autofocus is difficult. Sharpness and contrast suffer with a T/C. I have a Sigma 170/500. Results are ok if not to picky.