All language subtitles for Reeflex Pro Camera 3_5 – Focus Stacking on iPhone for the First Time!_Eng

En Reflex Pro Camera 3 .0

we had focus bracketing and now

just a few short months later

we have

focus stacking. This is a first

and only in the app store

Reflex Pro Camera now the only

camera app to offer focus bracketing

and focus stacking in one. You

can take your bracketed

photos and stack them automatically into

a single image and if not

sure why this is such a

big deal

or what are these terms that

I'm using bracketing, stacking all that

good stuff that is what

this video is for. I have

a little setup in the corner.

Sure there it is. So go

through

here now what is focus stacking?

Why might you want to use

it? How does it work?

On a Reflex Pro Camera app

and how does it compare to

the traditional method of stacking on

a

computer.

So let's go and have a

look.

Okay here we are. Let's open

the Reflex Pro Camera app

and go through focus bracketing and

focus stacking because you can't have

focus stacking without

focus bracketing and this is the

problem that both of those things

solve. Look at how shallow

the depth of field is here.

If I tap the MF icon

and then I drag this slider

this is the manual

focus slider.

You can see just how shallow

the depth of field is and

I've got that green

around.

That's called focus peaking and that

allows me to see exactly where

the focus is and how much

I have in focus here. So

if I turn this off that

is what one of my images

would look like at

this focus distance. So what focus

bracketing and now focus stacking allows

me to do is take a

range

of focus and combine it automatically

into a single image on my

phone. Now normally this is reserved

for Photoshop affinity on computers

laptops things like that and it

is very very processor intensive

and it still is but we've

managed to get it working on

the iPhone and also pay attention

to the focus

breathing. That's that zooming in and

out effect as I focus further

away and closer. So this is

one of

the reasons why it's so processor

intensive because the algorithm has to

align all of these photos

and compensate for that focus breathing

and it has to blend them

all together without melting your

phone and we've done it and

to find out a bit more

about how we've done it. I

had a chat with

Simone who is the developer of

the reflex pro camera app and

he talked me through how it

works and

how he was able to bring

focus stacking to the iPhone for

the first time. So let's start

by bracketing.

We need to bracket first and

the key to bracketing is to

choose our focus range.

So I'm going to open

what bracketing and we get these

two numbers we get not 0

.2 and not 0 .8. So

this is our focus range

and these correspond to the manual

focus slider.

So now we have to decide

how much do we actually

want in focus. So I want

everything. I want from that tip

of that leaf there all the

way

to the back end of this

road. So I want 0 to

1. I want the full range.

You might not need the full

range. You might not want the

full range. It is up to

you. It depends on the size

of your subject, how

far away your subject is. Again,

your creative choices.

This is up to you and

I can tap the mountains

to just quickly zoom and tap

the flower to zoom back the

other way. So 0 to 1

and now I need to choose

just how many photos I want.

Now when the depth of field

is this shallow,

then you want as many photos

as you can get. Now you

don't want. If you see your

final stacked result, if you see

it with a bit of

blur,

a bit of patches of blur,

generally because there haven't been
enough

photos taken.

So you can

always increase the amount of photos.

We have a maximum of 100.

I don't need 100 today. I'm

going

to go with 50.

And I've got my resolution here

set to 48 megapixels. I'm just

going to start the

process off and keep talking to

you about that. So this is

now capturing and bracketing 48 megapixel

photos. You can see the focus

meter there is changing.

The focus breathing is happening very,

very subtly as the images are

capturing up to 20 now.

And so these images are saving

to my gallery.

I can do with these images,

whatever I want. I can take

them over into photo shop. I

can bracket the

traditional way. If I want to

at 48 megapixels,

I can delete them. I can

keep them. It doesn't matter.

It doesn't affect our final stacked

result.

Of course, I want to stack

on the phone today.

And now this is a summary

of all those images.

So this is our anchor image.

We can change this.

Now the anchor image is going

to be what the algorithm bases,

the blending and the aligning around.

And I've found that I just

leave it sets of the first

one and it always does a

great job. And I can

choose here. Do I want faster?

Do I want more precise, which

is slower and more accurate?

Balanced again, it gives me a

great result. So it depends if

you speed is priority. And speaking

of

speed, we have actually sped up

the bracketing process as well.

We introduced bracketing in version

three of the reflex pro camera

app. And people asked, can you

make it faster? So we have.

And it's in the

settings now. You can choose to

make the bracketing faster.

Also the resolution will will affect

the

bracketing speed as well. So you

bracket at 48 megapixels, it takes

far longer than at 12 megapixels.

So now you can see here,

again, Simone talked me through all

what this is.

We basically implemented the algorithm
that

runs entirely on device and it

runs on the GPU and

neural engine of iPhones.

So it's blazingly fast, I would

say.

You would notice if you use

the app

very intensively that sometimes the
stacking

takes time.

But what's basically what's happening is

not

even that the alignment or the

stacking is low.

Is the system processing your image

that it's taking

time.

So there are like multiple settings

that you can choose. For example,

if you go to the set

things you choose fast as your

bracketing speed, you will notice how

like if you choose fast,

there will be no processing opening

and the stacking and alignment will

be very fast.

So we developed

this alignment algorithm and it runs

entirely on the neural engine and

the GPU of the iPhone.

So it's

all that the rows in focus.

I get those leaves there, they're

coming into focus. Now as we

get closer to

one, the back end of our

focus and look at that. I've

got the leaves, I've got the

rows to front end,

the back and I've still got

the beautiful bokeh there in the

background.

Lovely job. Now if this

wasn't right for some reason, I

could discard it, but it is

fantastic. I'm going to tap it

done.

And now if again, if it's

not right, you can try again.

Let's have a look at what

fast and does

actually. So it's now stacking a

lot faster than it did a

second ago and we can actually

compare

the results if you like. Well,

we're doing it now.

And again, I've never really had

to

ask it to try again. I'm

sure I will, you know, tricky

lighting situations,

tricky subject matter.

Things might move in between the

bracket without me realizing. Of course,

if I've not mentioned it,

I'm on a tripod,

obviously, because if your camera moves,

then you can still align slight

movement,

but you're going to have the

best results on a tripod.

So here's the balanced result.

And here is the fast result.

Both look the same. They look

great. And I also stacked the

same 50 photos

in Photoshop, which normally works really

well.

But here, after two attempts,

both had these weird

blurred patches.

Now earlier, I said that this

can happen when you don't have

enough photos,

and you have gaps in your

focus.

But I used the same 50

photos as the reflex result,

and we know that those gaps

don't exist.

But forget Photoshop,

the main thing is that you

can now

bracket and stack, or as I

like to say, bracket and stack

it reliably,

right on your iPhone

in the reflex pro camera version

3 .5. And you can download

it with the link in the

description.