It might seem like a bit of an odd thing to be setting up a clothes line
in the middle of a park, Tasha do you mind lending me a hand? thank you.
If you stand on the wall there, that'd be brilliant and just hold that, there we go.
But there's a very simple shot which I've taken in my garden
on quite a few occasions and i thought it would be a good thing
to test these lenses with, to compare them
and it's a little tip for you to go and take quite an interesting picture without
much effort.
lenses always perform at their worst at the extremes, if you're full zoom and
maximum aperture
that is when you're gonna see
the least
image quality.
So if we're going to put the two together let's see what we get when
when we shoot this image, i'm going to be shooting along these lines and using
the fuzziness over there beyond the little stream
as a background.
The light coming through the pegs, they're translucent which will bring out the
colours and make them look pretty cool i hope. Camera's, lenses
both of these lenses
the consumer lens and the professional, they're on identical bodies i'm not using
different cameras.
I've also got the cameras set up so that the white balance the iso and
everything in the menu
is identical, so it's a fair test of the lenses.
The reason i'm not swapping them over is because i don't like changing the lenses too often
or the costumed bits in the camera.
Pro lens first
widest aperture
which in this instance is F two point eight that's a very very wide aperture
check the iso, we're down to two hundred
maximum zoom that's two hundred millimeters, now i'm just going to look along these pegs
and i'm gonna focus
on the red one
here we go,
like that, uh
squeeze the shot.
perfect.
Same shot using
the consumer lens,
just check our iso, two hundred
widest aperture which in this instance is five point six, it's not such a
wide aperture.
That will have an impact on the way the image looks
more on that in a moment.
Just get my angle right, so i haven't got Tasha's elbow in shot, there we go.
perfect
let's compare the two now this isn't the best way to compare an image in the
Lcd in the back of the camera
however
click the download link beneath this film and you can download these images
and compare them for yourself, i'm going to mark them up so you know which is which.
I'm not going to mess around with them in Photoshop or anything like that
but i'm gonna re-size them and make them a bit smaller.
so they download at a sensible rate.
Now first off, comparison, looking at the two
colour wise i'd say there's not much in it,
but then these Lcd's
are not really the best way to go about it.
If i zoom in,
onto the spring
yeah that's nice and dark nice and crisp and lovely
for zooming onto the spring of
this one, the red, again i'm always looking at the red one,
with the consumer lens
there's a softness too it.
Now in the middle of the lens is where it's performing at it's best, so if we've got a
softness in the middle of the lens
using the consumer lens
then it's going to be a bit worse as you move to the edges of the image.
What do i mean by the edges?
I mean by the sides so i'm standing probably pretty much in the middle of your picture
the edge would be about here and about here
either sides are the edge of the frame.
So we can do a little test with that as well, no we won't i'm sorry we're going to do another test at
another aperture.
I'm forgetting what i'm doing i'm planning so many things for this film and i keep forgetting
what i'm gonna do.
I want to shoot it at the smallest aperture let's go to F twenty two
that's gonna increase the depth of field, but more of that in a moment.
cause i wan't to see what happens with a smaller aperture
and the same in shot.
To get that shot now I've got a smaller aperture
i need a faster shutter speed or i'm
gonna get camera shake, the shutter speed has dropped dramatically it's very very
low at the moment it's only at about a thirtieth of a second.
so
the way to do that is, increase the iso because i can't
do anything else if i want to use the aperture, which i've chosen F twenty two at two hundred
iso
line up the shot.
yeah looks nice
same again here
let's make sure it's a fair comparison, i'm going to boost the iso here as well,
sixteen hundred
there it is
go to F twenty two
there it is.
and take the same shot
woah, it's very warm today
i'm sweating like a stuffed pig.
here goes
there we go, theres the two.
just pop these
side by side again, i'm going to have
a quick zoom in.
let's see what we've got.
Again i'm always focusing on the red peg, this one here, so it's the second one back
in the shot.
Yeah that's nice and sharp, all around the red peg.
That's very sharp actually it's really nice.
Looks good, and as you can see if you go between the wide aperture and
small aperture shot, the depth of field has changed aswell,
there shouldn't be much impact at F twenty two, between the two lenses. I'm just looking
at image quality,
image quality with the pro lens
F twenty two,
very good indeed from what i can see here.
zooming in
F twenty two
it's okay, its acceptable
but there is a definite softness to the edges
and they're slightly fuzzy.
Edge sharpness
i mentioned that didn't i?
So let's take a couple of shots
at the edges of the frame.
What i'm gonna do is to line
these here, on on the edge, one on the edge and one in the middle.
So let's have a go
uh... back to all widest aperture f
for twenty six
i would say the ice air bag and against two hundred
so this affair tests
just line up my children if you start to one side just slightly
bank u_s_ plenty simply
working on the red paint
today
befitting the front of her paid on either side
from the farms
morphologic
excellence
sank into these things
back to award a structure
discussions to coincide
i sat back and two hundred
that's gone on squirrel
perfect
with the little zemin reprise lengths
from i can see here
the pegs on either side
thought equally sharper wouldn't say this much difference
we have been the heated softness actually but it isn't very much
one of the middle east peace we shall without consumer lengths
cashier relax you can drop the line actually
acc
thanks matt
luke
actually is fairly uniform
these uniforms slightly sulfur out
now this is not a big softness isn't an immense issue
all i'm saying is is not quite as good the pronouns as you know i mean you with
pictures old films we've done for the job with this lens than not that bad
is it that you make of your own mind it's worth spending the box
the thing whether programs and the big aperture
and the depth of field a friend's is this is gonna give you a big advantage
if you want to stop isolating a subject from the background so you want a
i say to face in the crowd or shoot support right with a very blurry
background
the berry background with the white at two point eight aperture
is absolutely brilliant he's perfect for it