Videography 101, Understanding Lenses


welcome to make your media the show that teaches
you everything you need to know to start making your own media my name is Uri Soglowek and
i host this show. if you’ve seen our last videography 101
episode ‘ all about exposure’ you know that the lens you have on you camera is 30%
of the camera’s exposure. if you haven’t seen that episode click on this link and go
ahead and watch that episode now. one of the things i remember i asked myself when i started
out in video was what is the difference between all the lenses out there. so in this episode
we understand lenes better. in order to understand lenses you have to
understand the different category of lenses zoom lenses and Prime lenses. the difference
between the two is that the zoom lens will as it is called – zoom in and out and the
prime lens will not. it has a fixed lens and if you want to frame the subject differently
you will have to move around with your body. Prime lenses and Zoom lenses will differ in
price and quality. most times the Prime lens will be sharper than the Zoom lens. the other thing you need to understand about
lenses are the numbers on the barrels. again, i cover that in the episode videography 101
– understanding exposure which you should see. in essence the lower the numbers the
wider the lens is and the higher the numbers the lens more telephoto. so a lens with the
number 14 will be a wide angle lens and a lens with 300 will be a telephoto lens. the
usage of the lenses will also differ as you will not use a telephoto lens to shoot a dialog
and you will not use a wide angle lens to shoot a dialog either. the numbers refer to
the focal length of the lens. the focal length of the lens is the distance between the lens
and the image sensor when the subject is in focus. so the lower the numbers on the camera
the wider the field of view is. this sequence i shoot for a short movie was
shoot on a 35 mm prime lens. and now you actually understand what that means. it is a prime
lens, that is, it is not a zoom lens and it has a focal length of 35 mm. one thing that you have to pay attention to
when using a wide angle lens which in focal length numbers will be anything up to about
45 mm is that wide angle lenses distort the object making the object close to the lens
abnormally large. one more thing you have to understand about
lenses is that different lenses have different aperture.if you don’t know what aperture
is you should watch this episode where i cover that. Prime lenses will have only one aperture
number and it will usually be low, meaning the area the lens is in focus on is very small,
making them the best for shoot with very shallow depth of field. zoom lenses will usually have
a higher aperture as the lens has more moving parts in it. another point to understand about lenses is
the different lenses manufactures will manufacture different lenses for levels of users. canon
has a usual lenses and their L series lenses, L for Luxury of course, which will have the
red ring at the top of the lens. Sigma has their Art series and so forth. this lenses
are usually sharper and also more expensive. one last point with regard to lenses is the
difference between cinema lenses and regular lenses. the cinema lenses are very wide with
more numbers on them and the photography lenses are usually narrower and with less numbers.
the difference is simple. there is none with regards to the the actual quality of glass
and elements in the camera. the difference is only the build. the photographic lens is
build to be hand held and operated with one hand and the focal length numbers are written
on the top so the photographer can look glance down at them. the cinema lenses are wider
to make it easier for the focus puller, the man in charge of operating the focus, keep
the subject in focus all the time with tiny increments of movement of the focus ring.
the bigger barrel of the lens makes it easier for the focus puller to pull the focus easier.
the reason for more numbers on the barrels of the lens is that while shooting a movie
the focus puller could stand on one right of the lens or on the left of the lens and
still know what he is doing. another difference is the option to operate
the aperture from the lens itself and not from the camera. this 85 mm prime lens has
a focus ring and an aperture ring on it whereas most photographic lenses will not have an
aperture ring on them. so now that you know the difference between
the different lenses it is time to get yourself a lens and start shooting. try shooting the
same objects at the same light conditions with different lenses and see if you can tell
the difference. and with that we finish another episode of
make your media. don’t forget to subscribe to the channel and hit the like button if
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