I have a 150-500mm lens in my hand
Many people ask me when they saw a long Len like this
Hey, how far can this Len shoot?
I think this is a misunderstand about the telephoto lens for everyone.
How many times magnification of the human eye equivalent
To a 500mm lens
Let's put it on the comments below
Lets find it out today
And we will reveal it to you at the end
Welcome to today’s episode
I’m Brian
Well Melbourne restriction easing finally
We can hangout again
How far a telephoto can shoot
Is a problem about lens magnification
And the concept of magnification
Is come from the telescope
Let me explain
The magnification
Ten times magnification for example
If you observe an object where 100 meters away
With ten times magnification telescope
Equal to you observe
An object where ten meters away
That’s it
So how many times of magnification
It equivalents to a 500mm lens.
Before we figure it out
There’s two questions
The first question is
Relative to the human eye
How many times of magnification?
It equal to the focal length of the camera
Figure the first question out
And another question is to figure out
What is the highest resolution of the human eye
We have a special way to test it out
If we want to know how many times of magnification
Between eyes and telephoto lens
Its simple
We need to figure out
How many times magnification of our eyes
And how many times magnification after
Covert to camera focal length
Its easy to solve it
Let’s do a experiment.
If you have a camera
And a standard zoom lens
Lets do it
Look at a physically item
With your left eye
Like three meter away from you
And raise your camera
Then look at the item with your right eye though the viewfinder of you camera
It looks different from left eye to right eye
Because you are using a zoom lens
Now let’s spin the zoom lens
Let the item
In you right eye
Looks in same size from your viewfinder
What’s your focal length of the zoom lens?
Let me know from comments below
Different combination of camera and lens
Lead to different result
Here is my result
Which is
70mm, it means my eyes
Is equivalent to 70mm Magnification focal length with
This camera and lens
and
We cam calculate
If I use same camera
But with a 500mm lens
500 divide 70
Help me
About 7.1
So the optical magnification
Of a 500mm lens
Is 7.1 times of my eyes
7 times, remember it
but
Its only for this camera
If you switch to others camera
The magnification will be different
We just figure out
The distance different between focal length of camera
And human eye
Now we need to figure out
The different of resolution between
Camera and human eyes
Because when you want to see something clearly
You have to see
It’s details
So we need to do a test like this
96 00:03:35,823 --> 00:03:37,003 The camera that I’m using now
Is Sony a7siii which only have 12.1 Mp exmor
That everyone thinks its not high enough of pixels
The resolution of camera
And the resolution of my eyes
Which is higher in same focal length?
Lets comments below
Is a7siii better or human eyes better?
To test it
I have a profession tool
The eye chart
God blessing
My eyesight good since I was young
My left eye is 1.5 always
Right eye is about 1.2
What do you think of
The resolution of camera
Now we
Put the eye chart
5 meters away from me
And we use the 70mm which is
The focal length equivalent to the magnification of the eyes
Lets see
What’s the different between our eyes and the camera?
I can see the fifth row from the bottom with my eyes
I need to guess for the fourth row from the bottom
Now we use 70mm lens
To take a picture of the eye chart
Let’s take one more just in case
Lets take a look
I enlarge the picture
We can see the fifth row from the bottom clearly
And we also can see the fourth and third row
eh
Now things get interesting
Which means, in same optical resolution
12Mp pixels camera
Is better than
My eyes
And
From the size of letter
On the chart
The size of fifth row from the bottom is about 4 times bigger than the third row from the bottom
Of course
I might need to turn off the sharpening build in camera
And also
The magnification of pixels and algorithm
Let's count it doubled on the safe side
so
The 12Mp camera
Is two times than human eye at least in resolution
And add the 7.1 times optics
There’s the answer
If you have a 500mm lens
And with a7siii
I think in terms of magnification
Is 7.1 multiply 2
Is about 14 times
I don’t know
If you can understand it
If I use a camera
With better resolution
Like 60Mp camera sony a7riv
And
I would say the resolution of camera is about
6 times bigger than human eyes
I estimate
so
60Mp a7riv
With 500mm lens
It’s magnification
Is 6 multiply 7.1
About 42 times
This is too impressive!
So can you comments below
The longest focal length lens that you have
And with you camera
What’s the biggest magnification?
Since we talk about telephoto lens
Let’s talk about
Tamron 150-500mm lens
Let’s talk about my first impression of this lens
First, the focal length of the lens 150-500mm
For those people who like super telephoto lens
Its more practical if you are one of them
And it’s front filter size is 82mm
Not 67mm anymore
It’s against their own tradition
But 82mm front filter size
There are advantages and disadvantages
The advantage is the entire lens are smaller
Unlike tamron 150-600
With 95mm front filter size
It’s impossible to carry it out
The size of tamron 150-500 can be made 191 00:07:23,020 --> 00:07:24,820 As same as size of Sony 100-400
In 82mm filter size
But the problem is
The front of the len is small
It Will limit it’s own aperture
The maximum aperture is only F5.0
When you zoom into 500mm focal length
The maximum aperture turn to f6.7
It’s fine if you like shooting inthe
Great light environment
But if the light is darker
It may have a big impact
And the small aperture
Not only have the problem of light
But also the small aperture
may have an impact on auto focus
So this lens
pay a lot time on the design
Let's talk about what I like
First, the lens is from 150 to 500 mm
When it's zooming
the lens barrel only rotate 75 degrees
So when you are zooming the lens
don't need change the hold location
You can zoom to the end in one action
For shooting wild animals
You don’t know what the next shot will be when
This quick zoom is very useful
Another point, this lens
It has Arca-Swiss mount
So that you don’t need to carry another
quick release plate
Installing a quick release plate
is a particularly troublesome matter
It wastes space and it's easy to loosen
Now it has the quick release mount
can make it convenient
for the people who travle or need quick shooting
For design aspect
This lens has a dustproof and waterproof design
It is also a standard configuration for outdoor photography
The lens zoom tube has a brand new design
There is flex zoom lock
In our previous super telephoto lens
when zooming then lens
It alwasy has a damping setting button
can make it become damped loose or tight
But about the new design by Tamron
It is a very loose zoom design
But how can you keep your zoom position
and don't let the camera move by itself
Just need to push
the zoom ring forward
It will be locked
I actually like this design very much
It let you have a clear and accurate locked position when zooming
have a clear and accurate locked position when zooming
It prevents the lens zoom automaticly
when you picking up the camera to take a photo
Then let's talk about what I dislike
This may be a problem that many people are more concerned about
What design I don't like is
The first is the position of his manual focus ring
Is a small one at the back
close to the camera
To be honest, I am not comfortable with this position
I prefer something like Sony 100-400
Large focus ring
Put it in front of the lens
Use index finger for precise control
If I feel it, when I use it
Smoother and more confident
The performance of this lens
Maybe many people care about his picture quality
About picture the , I'll not drop the last veil
Let's talk about it at the end
Why
I don’t really think about the picture quality of a telephoto lens
and do the contrast quality test directly
Because in my actual use
found the super telephoto lens
Which affect the quality of your photos
is not optical design
It's more about the auto focus
and the stabilization performance directly affects you
Can this photo be taken clearly
Then my main test point
It's in these two parts
Ahh, not bad
It's a coincidence. Are they training a big parrot here.
Very beautiful macaw
Flying here from a distance of about 200 meters
Then follow and follow all the way
You can find out
the scene recognition is very stable
Then if there are many people in the background
But it can actually find this parrot among these people
And
Look!
It still can focus
Awesome Awesome
Autofocus is extremely important
for an ultra-long lens
I think this 100-500 lens does a good job
Because I have 100-400 lenses for comparison
I think these two lenses are in my use
I think they are similar
After finding the object recognition
it can quickly and accurately give you the right focus
Of course you may be the first time
Use an ultra-long focal length lens
You have to adapt to the method of using it yourself
But as the auto focus of this lens
I feel satisfied
Actually, this environment is not so wild
We have a concrete floor
There is a big lion in front. Let me test the anti-shake of this machine
What？
Get into the picture
Oh this is pretty
Get into the picture
So beautiful
Talk about the anti-shake
Can you feel it is working
Tamron has three modes for anti-shake
Mode 1 is standard stabilization, mode 2 is specifically for panning,
and another mode is
frame priority
Is to make the object of the picture
in the center of the picture
It is the most stable in theory
But I don’t know if this is due to Sony
or because of anti-shake of Tamron
It's working but it's not as stable as expected
Because compared to
100-400 the previous Sony 100-400
Then when you half-press the shutter,
you can really see the whole shaking screen steady
But can you feel that the picture
is still moving a little bit
1/125 But your shutter speed is set at 1/125
You can still take a clearer picture, that’s okay
The telephoto lens is such a thing
the longer it is, the more powerful it is
The advantage of having a 500mm lens is
you can take very close-up details
For example, the little paws of the snow leopard
By this time you are thinking, oops
It’s more enjoyable if the lens is longer
What is this behavior called
"Duo Sun Ne"
Back to the studio
100-500 Let's take a look at the picture
by using Tamron 100-500
The later work starts from cleaning up the working environment
The desk needs to be cleaned up, the computer needs to be cleaned up
After the filming and editing work is complete
There are more or less junk
and cache files on the computer
As the number of edited items increases
The space of hard disk is not enough soon
My Apple Mini mac
How to clean notebook and apple notebook
Today, let's introduce one
Well known software I am using
Clean up my Mac x
What's the function of this software
There are five clear functions
clear
protect
optimization
Application management
There are also five modules of file management
The function is very complete
The interface is simple
It is a necessary software for home travel computer installation
Here, the key point of the introduction is actually
One of the most powerful functions is cleaning
Friends who have used computers may have the same feeling
All the documents that I didn't use have been deleted
The wastebasket is empty, too
But the available space of the system is getting smaller and smaller
Especially like our raincoat users
Hard disk is not big
And it's very expensive
A lot of people are still staying at home
Several hundred gigabytes of this hard disk configuration
Tens of gigabytes of storage for me
Every inch of land, every inch of gold
It can keep the computer in a constant state
Just bought that fresh state
It's definitely my moderate obsessive-compulsive disorder
Patient's great comfort
Clean up my Mac x for raincoats
As long as you press a button, you can intelligently clean up the system
garbage files
And it's like emptying the wastebasket
And then there's the identification system
Or old to the point that you've forgotten
And outdated device backup
Old packages, etc
And then expired mail, large attachments and so on
Clean up so much that you want to
Unimaginable rubbish
Return the raincoat to its original performance
When the software is running, a small logo appears in the upper right corner
You can monitor the CPU of the system in real time
And the state of memory occupancy
Before you work
Release excessive memory with one click
seem
It's much more comfortable
Clean my Mac x
Apple's official certification
Protect security and privacy
And what about myself
It has been used for a long time
You can use it safely
The software is available in Apple stores
Or the official website
Try it
alright, conclusion
Talk about Tenglong's 150-500 lenses
As a lens with super long focal length
I think his fast focus
There are also basic anti shake devices available
I think it's basically OK
It's time to hand in a satisfactory answer
If you're looking for a telephoto lens
there is another choice for you
can't talk performance with out price
One of the biggest features of this lens is not too expensive
Think about it
Sony original lens
long focal length lens 100-400
Now the price is $3600
Then two days ago, the price went up to 3800
My God, this Tenglong has 150-500 lenses
The price on the market is $2000
I think the maket price will be cheaper then this
It's only half price of the original lens
if you are not usually use long focal lens
you have one more choice now
Basically, it can meet your needs
well,we talked about my feeling for this telephoto lens
and what is the magnification of a telephoto lens
When you start
What is the focal length of 500 mm? Are you right
Well, if you are interested in the topic
You can continue the discussion below
Thank you for watching
I'm Brian
see you next time
bye