Hello, everyone ! Today's topic is this.
This is the VILTROX 23mm F1.4 for the Sony A7 Mark 3.
VILTROX is a Chinese camera equipment maker, if you don't know.
I haven't seen an Auto Focus lens from Chinese lens makers,
so this is quite very interesting for me.
I'm going to review the lens for Sony E mount today,
but they also have the same lens for FUJIFILM X mount.
I put both links for Sony and Fuji on the description.
This is originally a lens for APS-C,
but today I will use it with this Sony A7 Mark3,
full size camera.
So I will be using a function called APS-C Super 35mm
of A7III.
By using this function,
you can use the lens for APS-C at full size.
If you don't know what I'm talking about,
surch ''APS-C/Super 35mm on the internet,
you'll get the information.
This time I will omit the explanation.
So, there is a negative point that the number of pixels is less
when used with a full size camera.
But after all, I think that there are many people who are interested in the brightness of f1.4
at a reasonable price.
I'm going to check these things today.
AF speed and accuracy, distortion, back light, any foggy effect at f16 ? Bokeh, and fringe.
OK, let's see the outer shell first.
Because the aperture ring is on the lens,
it is very familiar feeling and easy to use
as I often use the camera of FUJIFILM.
And here is a focus ring.
The outer shell is metal.
The hood is also metal.
The feeling that I touched is firm.
When connection to the body,
the sliding feeling is firm as well.
When I turn the aperture ring, there is no click feeling,
it's not actually a step-less adjustment,
but is is a feeling of step-less adjustment.
I have a habit of holding this aperture ring when I hold the camera,
aperture setting was changed while I didn't notice.
So, for me, the aperture ring would be a little more rigid.
There is a little frictional noise when sliding the aperture ring.
The focus ring is very smooth movement.
There is a badge of C,
I don't know what the C stands for.
But it looks like a Sony G master lens.
Next, let's see the AF speed and the accuracy.
As you see, there is no problem on AF.
It's speedy and accurate.
I didn't expect it.
The position of the focus point is fine anywhere.
Face detection and eye detection can be used.
This is a small stuffed doll, but face is detected.
Movie AF is also smooth and accurate.
Next, distortion.
Obviously there is a distortion.
I think it's not a problem, it's just a feature of this lens.
If you don't like them,
you can remove them with an editing software such as Lightroom.
Next, I wanted to see the clarity and
if any foggy effect appears on the images when the it is f16.
The distance between the camera and the newspaper is about 35cm.
The focus point is on the center.
At F1.4,  a little soft on the center.
and it's blur on the edge side.
And I see the vignette.
The vignette is quite obvious.
You can remove them with Lightroom.
At F2, the center is clearer than f1.4.
But still, there is a vignette.
At f2.8, vignette has almost disappeared.
The center is clear, but the edge side is still blur.
At f4, the edged side is still a bit blur.
At F5.6, it's quite clear all over the frame.
F8, perfect.
F11, this is also perfect.
At F16, when I just glance, I don't notice, but,
if I compare to the F8,
F8 is a bit clearer than f16, I think.
I think there is no big problem on this lens.
I had a experience of seeing foggy effect when I used a Chinese manual lens which is not from Viltrox,
I clearly saw the foggy effect at f16 on the manual lens,
I was worried that such an effect come out this time again,
in the case of this lens,
there is no such thing, and I think
that it can be used for practical use.
Next, bokeh.
The shape of bokeh is round at the center,
the shape of the edge side is lemon shaped.
I think that this type of bokeh is OK, but  look at this,
I think the bokeh on these pictures are quite noisy.
But it's just a personal preference.
Next, backlight test.
I know it's a  bit of an extreme way to do it,
I put a light on the lens as much as I could.
I see the flare at the F1.4.
At F5.6, something started to come out clearly on the image.
And I see more when the F number increases.
I don't like it...
Next, fringe.
I don't know what the conditions make the fringes,
Fringes come out sometimes.
You can remove them with Lightroom as well.
OK, let's see some sample images.
All the photos were taken with P, A, S mode. and Non edited JPEG.
I only used the lens for a week,
I felt that this is quite good  at a reasonable price.
As you saw the performance, although there is some negative points
if you are a Sony E mount user, I thought that
everyone would want it.
The price is a little different from Pergear which is the authorized distributor of VILTROX,
and amazon, so I put both the product links on the description.
To be honest, I didn't expect much about the quality of lenses made in China,
specially on the AF speed and the accuracy.
So, I was quite surprised at it.
There was no inconvenience in using it.
There are photographers who dares to add vignette effect at the time of editing.
There is photographers who dares to add vignette effect at the time of editing.
So, I don't think you don't need to hate it very much.
You can remove the vignette with Lightroom, so this is not a big problem, I think.
Overall,  as I really didn't expect that much about the quality,
I was purely surprised at it.
OK, this is it for today.
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See you soon at the next video, bye !
