Canon 10-18 STM Continuous focus

akt416

akt416

Member
i just bougt a 10-18 f4.5-5.6 IS STM for my t3i and i was reading something about the stepping motor being able to continuosly focus while recording video. I tried some stuff on the camera but cant figure it out. i have magic lantern installed i dont know if this has something to do with it?
 
Yeah basically every dslr will not have reliable auto focus while filming. Sorry bud
 
look at hyperfocal distance. There are many sites/apps that can calculate it for you. This will give you a range where everything within it will be in focus (you leave the lens fixed/on mf). AF during video is usually slow and hunts for focus, but with some practice you should be able to keep your subject in focus very well using this method.
 
13530335:p.hawks said:
look at hyperfocal distance. There are many sites/apps that can calculate it for you. This will give you a range where everything within it will be in focus (you leave the lens fixed/on mf). AF during video is usually slow and hunts for focus, but with some practice you should be able to keep your subject in focus very well using this method.
Click to expand...

i tried this, it say for depth of feild:

Near Limit: 2.78 ft

Far Limit: Infinite

Total: Infinite

In front of subject: 7.2ft

Behind subject: Infinite

Does this mean that everything past 7.2 ft away will be in focus? or 2.78ft?
 
The stepping motor only "continuous focus"s on the 70d and 7d and maybe the newest Txi, Your camera has to have to dual pixel thing to run an effective live af
 
13530547:EDolloStone said:
The stepping motor only "continuous focus"s on the 70d and 7d and maybe the newest Txi, Your camera has to have to dual pixel thing to run an effective live af
Click to expand...

shit alright, thanks bro
 
13530452:akt416 said:
i tried this, it say for depth of feild:

Near Limit: 2.78 ft

Far Limit: Infinite

Total: Infinite

In front of subject: 7.2ft

Behind subject: Infinite

Does this mean that everything past 7.2 ft away will be in focus? or 2.78ft?
Click to expand...

The way I am interpreting it, everything from 2.78ft to infinity will be in focus. I'm guessing you put a subject distance of 10 feet. The 7.2 is the range in front of your subject that is in focus. The best way to check is to try it out. Go outside, find a few objects you can use to check your dof. Find one thing at 10 feet, focus on it, then take a picture and see what else is in focus. Try to have objects at various distances to give you an idea on where the range ends.
 
13531227:p.hawks said:
The way I am interpreting it, everything from 2.78ft to infinity will be in focus. I'm guessing you put a subject distance of 10 feet. The 7.2 is the range in front of your subject that is in focus. The best way to check is to try it out. Go outside, find a few objects you can use to check your dof. Find one thing at 10 feet, focus on it, then take a picture and see what else is in focus. Try to have objects at various distances to give you an idea on where the range ends.
Click to expand...

il try it, thanks man
 
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