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Old Nov 30, 2012, 08:29 PM   #1
VideoNewbie
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Help. I Failed! What kind of Canon Lens Can Achieve This Kind of Look?

i could really use some photographer/videographer help.

Im really young so pardon how ignorant i am to things that must be so second nature to u all...i just recently bought my first dslr canon t4i to film self videos and youtube vlogs after working my butt off and saving money for months and well im hitting a lot of bumps in the road

i have two main questions...

Question#1
i want to recreate a video with the same quality as this:


i was told that i should buy a lens with a low aperture to create a blurred background effect. i ended up buying the 50mm f1.8 lens (someone suggested it to me)



but i soon found out that this lens is NOT for taking self portraits or self videos it is way too close on the face

i set up the camera on a joby tripod on my desk about a feet and a half away....this resulted in my face taking up the entire screen ....in order for proper framing i had to sit about 6 feet away from the camera.

the lens that came with the camera is a 18-55mm f3.5-5.6 lens



and while that one has better framing for self videos, the result is not like what i want because it just looks boring and flat. it doesnt have that same depth as the video above.

is my solution as simple as buying a lens with a smaller focal length ?

(on a side note why is this video of such poorer quality? does this seem like the same lens as above?)



---


Question#2 one of the new features on the t4i is the auto focus during video and pictures. however the constant clicking and focusing of the lens makes for a lot of distracting noise. surely this is not optimal for video shooting?

also how is the auto focus on the t4i any different than if i were to just toggle the "AF/MF" tab on the actual lens itself?


---

i just recently started learning about cameras and i have Other random wonderings:

-why would anyone want a slower shutter speed? high shutter speed = less chance ur photos will be blurry correct? but i notice everytime i adjust my shutter speed higher the preview image becomes much darker. why is that?

-even when my camera is in "auto" mode i find that all the photos i take are blurry. on my old camera (powershot) i could simply have the camera in auto mode and if i pressed the shutter button halfway everything would focus, but doing the same action on my new dslr camera results in blurry pics every time.

-i understand the camera powers off after 30 sconds of inactivity but why does the lens constantly "shutter off" in the middle of me adjusting things? its highly annoying. what purpose does shuttering off on its own serve?
any way to modify this?

-the canon 50mm f1.8 lens has a set aperture....so what then would be the purpose of being able to adjust the aperture in the camera's settings?

thanks i am trying to learn as much as i can and any replies would be appreciated

Last edited by VideoNewbie; Nov 30, 2012 at 09:19 PM. Reason: Added YouTube tags
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Old Nov 30, 2012, 10:26 PM   #2
diamond3
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A small overview you need to understand...
f-stop (this is your f1.8-f22etc) The smaller the number (f1.8), the larger opening of your iris. This results in more light coming in and a more shallow depth of field (area in focus).
Shutter speed: higher shutter speed=less light reaching sensor (darker picture) For video the rule of thumb is your shutter speed should be 2x your video frame rate (ie. 30fps or 60fps).

So how those two relate? Set your shutter speed to 1/60. Go outside on a bright day with your 50mm lens and adjust your camera to f1.8, your view will be white from a blown out image. You can do two things, increase your f-stop number which will increase your depth of field and lower the amount of light in or you can increase your shutter speed (1/2000 or something) and still retain your shallow depth of field but have the image exposed properly.
Another thing to consider: focal length. Your depth of field is more compact the longer the lens. So 50mm lens at f1.8 will have a smaller area in focus than a wide angle 14mm lens at f1.8.


Hopefully this makes sense as it should answer several of your questions below. I'll answer anything else below in bold that this may not touch on.


i have two main questions...

Question#1
i want to recreate a video with the same quality as this:
YouTube: video

i was told that i should buy a lens with a low aperture to create a blurred background effect. i ended up buying the 50mm f1.8 lens (someone suggested it to me)

Image

but i soon found out that this lens is NOT for taking self portraits or self videos it is way too close on the face

i set up the camera on a joby tripod on my desk about a feet and a half away....this resulted in my face taking up the entire screen ....in order for proper framing i had to sit about 6 feet away from the camera.

the lens that came with the camera is a 18-55mm f3.5-5.6 lens

Image

and while that one has better framing for self videos, the result is not like what i want because it just looks boring and flat. it doesnt have that same depth as the video above.

is my solution as simple as buying a lens with a smaller focal length ?

I think it is a wide angle, fast lens (f2.8 or less) with it set really close to them.


(on a side note why is this video of such poorer quality? does this seem like the same lens as above?)

YouTube: video

---


Question#2 one of the new features on the t4i is the auto focus during video and pictures. however the constant clicking and focusing of the lens makes for a lot of distracting noise. surely this is not optimal for video shooting?

also how is the auto focus on the t4i any different than if i were to just toggle the "AF/MF" tab on the actual lens itself?

If you are standing still, turn off auto focus so there is no hunting around during the video. Audio is ideally done through a mic instead of the built in camera.


---

i just recently started learning about cameras and i have Other random wonderings:

-why would anyone want a slower shutter speed? high shutter speed = less chance ur photos will be blurry correct? but i notice everytime i adjust my shutter speed higher the preview image becomes much darker. why is that?
explained above. If you take pictures, you can have the shutter open for seconds at a time for still portrait night shots. This allows more light to hit the sensor.


-even when my camera is in "auto" mode i find that all the photos i take are blurry. on my old camera (powershot) i could simply have the camera in auto mode and if i pressed the shutter button halfway everything would focus, but doing the same action on my new dslr camera results in blurry pics every time.
I'm not sure what is going on. Are you using the lcd or viewfinder? If you press the button half way down, it should lock on and be in focus. You should no before you even take the picture. Make sure you are on AF on your lens and not MF.

-i understand the camera powers off after 30 sconds of inactivity but why does the lens constantly "shutter off" in the middle of me adjusting things? its highly annoying. what purpose does shuttering off on its own serve?
any way to modify this? I'm not sure I get what your saying.

-the canon 50mm f1.8 lens has a set aperture....so what then would be the purpose of being able to adjust the aperture in the camera's settings?
as mentioned above, to change the amount of light or change the amount of depth of field.

Last edited by diamond3; Nov 30, 2012 at 10:36 PM.
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Old Nov 30, 2012, 11:05 PM   #3
VideoNewbie
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Quote:
Originally Posted by diamond3 View Post
f-stop (this is your f1.8-f22etc) The smaller the number (f1.8), the larger opening of your iris. This results in more light coming in and a more shallow depth of field (area in focus).
Shutter speed: higher shutter speed=less light reaching sensor (darker picture)
So how those two relate? Set your shutter speed to 1/60. Go outside on a bright day with your 50mm lens and adjust your camera to f1.8, your view will be white from a blown out image. You can do two things, increase your f-stop number which will increase your depth of field and lower the amount of light in or you can increase your shutter speed (1/2000 or something) and still retain your shallow depth of field but have the image exposed properly.
hi and thank ur really helping me a lot

ok so the benefit of aperture (f stop) is that you can create depth of field. lower aperture = good for portraits. higher aperture= good for when u want to capture scenic backgrounds.

lower shutter speed is better for low light/high aperture, and higher shutter speed is better for lots of light/low aperture

do i understand all this right?

Quote:
I think it is a wide angle, fast lens (f2.8 or less) with it set really close to them.
by wide angle do you mean a lens with a smaller focus length? if so why is it that my 18-55mm f3.5-5.6 lens cannot reproduce a video like the one i posted? is it because the f stop is too high?...

do you think a sigma 30mm lens with a f1.4 would be good for the video i posted above? i will only be about 1.5-2 feet away from the camera and i want my framing to be about the same as the boys in that video so im not sure if a 30mm lens will be wide enough?


Quote:
If you are standing still, turn off auto focus so there is no hunting around during the video. Audio is ideally done through a mic instead of the built in camera.
if i use an external mic wont it still pick up the constant clicking? let me clarify my question....one of the heavily marketed aspects of the T4I advantage is how it can shoot better video than the t3i due to its autofocus for video....so the question remains, how is the t4i autofocus function any different than a t3i using the AF tab on the lens itself.

---

Quote:
I'm not sure what is going on. Are you using the lcd or viewfinder? If you press the button half way down, it should lock on and be in focus. You should no before you even take the picture. Make sure you are on AF on your lens and not MF.
Okay yes. my lens was in manual focus even though i had set the actual camera to be in AF mode. i do have a new question though, how do i turn off the flash while in portrait mode with the lens set on AF? and how is T4I's "new" auto focus any different than the auto focus on previous versions?
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Old Nov 30, 2012, 11:23 PM   #4
lot of apples
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Before you spend the money on a new lens, why don't you try the 18-55mm lens at different zoom lengths (from 18 to 55) and see which you like. It should take good video in a well-lit room. The 18 mm setting should give you the widest picture.

Regarding the video performance, here is a detailed review that might give you an idea of what's possible with this camera:

http://www.dpreview.com/reviews/cano...d-rebel-t4i/23
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Old Nov 30, 2012, 11:29 PM   #5
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Tokina 11-17 F2.8 on the crop body is what you will want to be looking at. It is not very expensive. Another option is the Tamron 17-50 f2.8 non VC which is pretty damn sharp and even cheaper. You can look at primes. 24mm or 28mm or even 35mm. The 50mm lens is a good lens on a FF camera, but on the crop body it tends to be a bit too short.


To find the focal length of a prime, take your 18-55 and frame the photo that you want and see where you are at.

The T4i has more focus points to work with so the focus is faster. The problem is that many of the EF-S lenses are very very loud with AF. Both of those lenses I mentioned are pretty loud so you wouldnt want to be doing AF with them and video unless you use an external Mic. I would have to even be off shoe to get as far from the camera as you can.


another thing that you can do to make better videos that are planned is to set focus points. Mark the lens somehow or use a focus arm. This way you can find 2 focus points very fast and amke the transitions smooth without much hunting.
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Old Nov 30, 2012, 11:44 PM   #6
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here is an example of focal lengths. I just did this without regard to setting up the scene or even caring about any other settings than the focal length. The monster is 5 feet from the camera on a tri-pod and the monster is 18 inches tall.

From furthest to closest. 17mm, 24mm, 35mm, 50mm all taken at f2.8
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Old Nov 30, 2012, 11:55 PM   #7
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and here is an example on here about the noise during autofocus. That noise will be there when used on camera no matter what the focus is like. This is the Tamron 17-50 F2.8 which is a loud lens.

http://www.youtube.com/watch?v=bwyCW...ature=youtu.be


What you may try with your 18-55 to get more depth of field look without spending a bunch of money is to have the subject further away from the background and closer to the camera.

What you really want for the silent AF during video is an STM lens. Unfortunately there are only 2 at the moment in an EF or EF-S mount. The 18-135 and the 40mm pancake. The 40mm is a great because it will also give you the f2.8 so a good shallow depth of field and at $200 you cant beat it. Take back the 50mm 1.8 if you can and get the 40mm. You will be very pleased.

Last edited by peeaanuut; Dec 1, 2012 at 12:01 AM.
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Old Dec 2, 2012, 06:14 PM   #8
diamond3
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[QUOTE=VideoNewbie;16403622]hi and thank ur really helping me a lot

ok so the benefit of aperture (f stop) is that you can create depth of field. lower aperture = good for portraits. higher aperture= good for when u want to capture scenic backgrounds.

not always the case, but yes, you are understanding the concept.

lower shutter speed is better for low light/high aperture, and higher shutter speed is better for lots of light/low aperture

daylight:
want depth of field? low f#, higher shutter speed to compensate for increased light = shot that the exposure is balanced.
little depth of field? higher f#, slower shutter speed (no less than 2x you frame rate)
Night time?
short depth of field:low f# for more light, with a shutter speed to balance shot.
Little depth of field: higher f#, shutter speed at 2x you frame rate, and likely compensate a little with iso.

Remember the longer your focal length (lens) is, the easier to obtain a good depth of field. Wide angle lenses give less depth of field. An example is trying to film a dance party in a dark area. A 50 f1.8 is terrible for shooting the crowd because at f1.8-f2.4 is a really shallow depth of field. So what you get most of the time is an out of focus shot because they are moving in and out of the focused area and you can't adjust the focus quickly enough.

Here is an excellent website to play around with: http://www.cambridgeincolour.com/tut...calculator.htm
Plug in different lenses, f-stops, and focal distance (between camera and object) and notice your depth of field.



do i understand all this right? - I think you do for the most part.

Go to a camera store and look at some lenses. Not your typical bestbuy or whatever but someone that specializes in photo equipment. It's worth your time to try it out if possible before assuming and buying something
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Old Dec 3, 2012, 09:32 AM   #9
handsome pete
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Honestly, I'm not sure you're going to be able to achieve exactly what you're looking for. Your biggest obstacle is that you only have 2 feet max. to work with. That's just way too close to have any sort of flexibility with the depth of field. An ultra wide lens might help but I don't think by much.

I wouldn't worry too much about the depth of field. You can get really great results if you just make sure you have good lighting and sound.

And as others have said, don't use auto-focus.
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Old Dec 1, 2012, 12:51 PM   #10
RedCroissant
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Quote:
Originally Posted by VideoNewbie View Post
i could really use some photographer/videographer help.

Im really young so pardon how ignorant i am to things that must be so second nature to u all...i just recently bought my first dslr canon t4i to film self videos and youtube vlogs after working my butt off and saving money for months and well im hitting a lot of bumps in the road

i have two main questions...

Question#1
i want to recreate a video with the same quality as this:

thanks i am trying to learn as much as i can and any replies would be appreciated
Why not ask those guys what their setup was and just go with that?
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Old Dec 1, 2012, 02:10 PM   #11
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It has been mentioned a couple times but I want to reemphasize the impact of good lighting. Here's a quick video on some lighting techniques. Shoot, learn, shoot more, learn more..... You aren't always going to shoot perfect video but as long as you understand why things didn't work, you will continue to grow.

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