this week I'll show you why you need a fast lens for astrophotography
astrophotography is a speciality in photography that you can get into and
nowadays you can get into it relatively cheaply if you have a kit lens at f4 or
f5.6 you'll need to get some glass that will let in more light
depending on your budget you can go for something like the batis 25 millimeter
if you don't have the money for that you can get the cheaper samyang 24
millimeter it really helps and will give you much better results if you do get a
fast lens I'll show you the differences between the kit lens and the faster
prime lenses and then the benefits of these speciality lenses I'll take it
that you know how to shoot the stars if not click on the I in the corner to one
of my other videos on how to shoot the stars basically you have to keep the
camera Rocksteady on a good tripod and keep the shutter
open for long enough to get the light from the stars into the camera but not
too long so that the stars start to streak you'll need a remote shutter
release or have the drive mode set to self timer now with the 24 to 70
millimeter it is a good all-around lens but it doesn't specialize in anything in
particular for astrophotography you can get good images with it but they'll tend
to be noisy because you have to bump the ISO up also if you shoot with a sony
camera the lens will be fly-by-wire so the focusing will be tricky to get and
this is why manual lenses are so good you can focus and set the aperture
before even turning the camera on and then you can check to make sure the
focus is in the same place just by shining a torch on it my 14 millimeter
and 24 millimeter samyang are both Canon mounts and I have them on adapters I've
tested both of these lenses in the day time to find the Infinity focus point
and it is good to do this as sometimes the quality control at samyang isn't
that great my fourteen millimeter has an infinity point just off the marked one
so I know that when I have this lens in this point the stars will be in focus
the 24 millimeter samyang also has a much
wider aperture so it lets in so much more light if you have a kit lens you
really have to bump up the ISO to get the shutter speed where you want it to
get a well exposed image and this will mean a noisy image even though editing
programs are getting better on nose reduction techniques are developing
you'll still get a kind of painterly looking image when you push the noise
reduction a little bit too much with the samyang 24 millimeter at F 1.4 it will
let in three more stops of light if your kit lens is at f/4 so looking at the
images side by side you can see why it's necessary to have a speciality lens for
astrophotography at 450 pounds in the UK or 429 dollars in the US this just about
comes into the budget range of lenses especially considering an L Series Canon
equivalent is one thousand five hundred and forty nine dollars and that's about
it I have a few different speciality lenses just for astrophotography they
stay in the bag until it gets dark the light gathering ability of these lenses
is spectacular and if you want to get some good ashtray shots you need to
consider these lenses they were led in so much more light they'll make it
easier few to focus and this will give you more time to take photographs and
less time to faff around with your kit to see what else I have in my bag click
on the eye in the corner this will take you to a video of how to shoot the Stars
as always if you like what you see give me a thumbs up if you didn't give me a
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