Hello I'm Graham and I hope everyone's having a great day and welcome to
today's video now in this video I want to show you how to create cinematic
looks with the DJI Osmo action camera now the word cinematic has become a
little bit abused over the years but it basically means that we are trying to
capture our video footage with the looks of the old celluloid film that was taken
in camera so that means we're using a frame rate of 24 frames per second and
in the actual film camera they used to use what's called a hundred and eighty
degrees shutter rule which meant that the shutter speed was actually twice the
actual frame rate of the camera so in terms of 24 frames per second we're
looking at the shutter speed over a forty eighth of a second now they use
the aperture to control the amount of light as then the film was fixed ISO in
our cameras we've got variable ISO but it's best to try and keep that to the
lowest value so we're getting the least noise and maximum dynamic range as these
cameras have a fixed aperture it means that we have to reduce the light that
reaches the sensor by means of a neutral density in order to get us down to that
one forty eighth or 1/50 of a second if you're shooting 25 frames per second to
give us the correct exposure now in this video I'm going to show you a filter
that's manufactured by a company called free well and I've got it installed on
my action camera here and it replaces the screw on cover that is on the action
camera when you first get it now I had extreme difficulty removing the cover
that was on my camera and I had to use slip-joint pliers with the cloth to try
and remove it it was on that tight once it remove you can actually install these
freewell filters on to the existing lens thread very easily these filters Oh
nicely machined finished off in black anodized aluminium with a nice red ring
around them so the actual thread is a perfect fit for the throat on the action
camera now these filters are really well defined
they've got a 16 layer multi-card process
scratch-proof dustproof and waterproof so that to seal with the camera and in
addition to that the gada a hydrophobic coating so if you get water on there or
fingerprints they're very easy to clean so great filters actually free well
produce a range of filters not only for action cameras but for drums as well so
if you're into that sort of market check out their website I'll put a link to
that in the video description below so you can check out more of their products
now the filters I've got here are the free well bright day pack now the bright
day pack consists of four filters so we have the ND 8 + dND16 + ND32 + ND64 so
that gives the equivalent of three stops four stops five stops and six stops
worth of attenuation so that's normally enough for this bright light conditions
remember shooting at a fixed aperture of f28 so we need to reduce the amount of
light now as a rule of thumb you should remember they got old sunny f-16 rule
and it applies to most equatorial countries so if you talk we're talking
about between the equator and sort of Britain the f-16 or f/11 rule should
help good so if you take the reciprocal of the film speed so if we're using iso
100 the reciprocal of that would be 1/100 of a shutter speed and that would
be at f11 so we want to go down to half of that so it's gonna be a 150 so that's
going to be f-16 and then to get down to the F 2.8 we need to go from here 16 to
11 so it's one stop - f/8 is two stops - F five point six is three stops - f four
is five stops - f two point eight is six stops so as a rule of thumb we need to
attenuate the light reaching the camera by six stops to enable us to get the
correct exposure so in most cases we're going to be using the nd 32 or the nd 64
filter to achieve the correct exposure I'm not let's just check the lighting
level jets here it's nice afternoon in the UK but the lighting level should be
roundabout f/8 or f/11 so we're talking about the nd 16 or nd 32 filter to allow
us to get the correct exposure now trying to achieve the cinematic
effect gets over the issue of these cameras with that fixed 2.8 lens running
at very high shutter speeds about to say a thousandth of a second to bright
sunshine if you went to the Saving Private Ryan looks at the opening of
that sequence a where all the water splashing into the air and all the blood
and guts as the soldiers would be a machine down you will see that the
droplets of blood and water are actually captured in droplet form normal
cinematic looks will give those as a stream rather than a droplet effect so
to give that smooth cinematic feel to your videos we need to be shooting at
the old cinematic frame rates and the shutter speed of twice the frame rate so
hopefully in today's video I'm going to be able to show you how to set up this
camera to give you that 148 go 150th the second shutter speed and use the right
neutral densities to enable you to get that shutter speed now incidentally
these free well-filled filters in the bright day pack or a combination filter
they're actually ND and circle polarizing so in addition to being able
to attenuate the light you can actually use these to reduce the amount of
reflections on water or snow or foliage to great effect so if you want to
actually reduce it or improve your skies being in your landscapes then the
circular polarizer is a fantastic addition to this filter pack so let me
set up this camera to show you the effect on the landscape behind me and
also I've got some shots which will demonstrate the effect of using the
cinematic frame rate and shutter speed versus the ordinary out of camera
footage that you get if you haven't got these filters installed well I'll set up
the DJI Osmo action camera on the tripod now so we can see what's going on the
back Natsumi in the manual exposure mode so we cannot control both the ISO and
the shutter speed now without any filtration on the front of the camera to
achieve a zero evie effect I am NOT to use ISO 100 and
the shutter speed is 1 640 to the second so the light is a little bit down on the
f11 rule but that's the nature of light so with our exposure at 160 40th and we
need to go down to 1/4 to enable us to get twice the framerate
so shooting here at 1080p and 25 frames per second we can see this indicated on
the screen here it's 1080p 25 frames per second 1 640 the second at ISO 100 first
of all I'm going to install the ND 8 filter and see what the shutter speed is
when we've got the correct exposure so I'm just going to screw that on to the
front of the action camera so that threads onto the lens mount now to
change the exposure we need to slide the screen across and now click on the
shutter speed and we can adjust the shutter speed until we get the 0eb back
again so hopefully we're going to be going down that's one TV underexposed
point 700 exposed so at 150 ii were actually 0.3 over expose so if we went
to one sixtieth of a second
we're at exactly zero evey so we're not quite at the exact frame rate for twice
a shutter speed but it's better to after the correct exposure than being
overexposed or underexposed so again if I slide that back you can see the effect
you know if you look at the screen at the moment is absolutely no vignette him
from these filters and there's absolutely no or color shift now to show
you the effect of the circular polarizing filter at the moment the
light is directly over my shoulder so that is on a zero axis for maximum cut
you need to be between sort of 90 and 180 degrees so as I rotate the circular
polarizing filter we may not notice much change in the sky it's getting brighter
and no it's getting darker I've got to turn the camera around so that it's 90
degrees to the Sun and let's see at the difference effect we get so I've already
said the camera know that it's 90 degrees to the Sun so the Sun is over to
my left the see the sky is bright there's very little clouds in that
position of the sky well as I rotate the filter you can see the circle polarizing
effect is having more cuts on the sky you actually see it darkening and it's
enhancing those clouds that are in the sky and now we've achieved maximum cut
and if I continue to rotate then obviously we'll go back to the non
filter position
so I'm here testing the Osmo action camera and I'm using the three well
bright daypack neutral density stroke circular polarizing filters they're a
combination of a neutral density and polarizing filter combined so you've got
the benefits of both filters in the one package well that's it for this video I
hope you found that useful please do check out that free website I'll put a
link to that in the video description below and also check out my photographic
blog where I've got a complete review of the free well filter system in the
review section of the blog and again I'll put a link to that in the video
description below and also if you are new viewer to my channel please do
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that's it for the video thanks very much for watching and as usual please do take
care and I hope to see you all in the next one
good bye for now