Lens for recording videos

davido_labido

davido_labido

davido_labido

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Well, not Photography & Video section, Hello! I rarely enter this realm of mystery as it baffles me, but lately I have been taking a lot of pictures of products for review/buildlogs etc.

Now, this is the kit I have already:

700D
sigma 17-50mm f2.8
Sigma 105mm f/2.8
Canon EF 50 mm f/1.8
Canon EF-S 18-55mm f/3.5-5.6

now, what I could do with (if they exist) is some kind of lense like the 17-50mm that has a silent autozoom or something. If i record whilst using that, it has just the right ability, just is silly noisy. I have used it, then dubbed audio over it after, but it creates twice the work and obviously i lose what ever audio is in the room with me.

What do you guys suggest?
 
EF-S for it's image stabilization, along with the 50mm for it's wide aperture should you need it sharper or more light.
 
i believe that's what i mean haha, i am not sure! The problem I am having is that i am doing videos close to the product i am trying to show off and it always seems to be out of focus, so i have to stop, refocus, start again, stop refocus...


e.g:

https://www.youtube.com/watch?v=8Qo0eh79b1w

so, i put the card there so i could focus on it, but then realised everything in front was going to be out of focus... half way through the video lol)

When i am doing video of my computers it will be diffrent and i will need to focus manually, i understand that, but i want something that will just auto focus on this...

Ashens on youtube has a good autofocus thing, but not sure what he uses.
 
Sounds to me like more of an aperture issue.

Try using the 50mm, stop it back to say f8.0 using manual focusing.

Sounds to me you're running a low f stop for the lighting, running it higher means you'll have a much bigger dof.
 
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Your 700d can certainly focus well enough automatically but focusing won't be very silent unless you have one of the STM lenses (regular ultrasonic focus motors are a bit noisy).

If you're filming static objects then you don't really need auto focus and it would probably struggle to focus on the small objects you place in front of the camera (especially with a background like you chose in the video).

Like Hux said, using a smaller aperture (higher F number) will help keep more in focus but you might not have enough light for that depending on where you're filming.

You can also move the lens away from the subject but then you'll lose detail which I guess you want?
 
Right, ok guys, thanks for that, as you can tell I am very new to this so I'm glad it's as close to layman terms as it can be.

I can get more light cheaper than I can do anything else, so I will try what you guys suggest, and if I need more light, I can grab a bulb and fitting, I already have a soft box, but I use it for a flash, I could easily use it on a continuous light source though.

Il have a play later and get back to you folks, I have a new keyboard which I can record =D
 
Yeah looks better :) Was the camera perfectly perpendicular to the desk? Seems like the left side of the keyboard is in focus whereas the right side is out of focus still a little.

It's worth setting up right so you know what will be in focus etc. Moving the camera away from the desk a little will give you more area that's in focus but you'll lose some detail obviously since everything will be further away.

If there's enough light then you can go even smaller with the aperture (F11 or F13 or something)

Can use something like this to work out how much will be in focus - http://www.dofmaster.com/dofjs.html
 
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