Field test! Image quality improvement by Fineshut anti-reflection sticker on the mount adapter

Hi this is Teppei, from Koyo Orient Japan.


We have started general sales of 'Ultra-anti-reflective material', FineShut KIWAMI, developed by our company this week. It has become a product that can easily take anti-reflection measures by only cutting and pasting the edge of materials. Let's just easily paste in an mount adapter and see its EFFECTS!


This time, I will use a Fujifilm X-H1 as the camera with a MD-FX mount adaptor and a Minolta MD50mm F1.7, which both combined is about JPY 4,000.


Why use MD lens? Well, because of its, cheap price depiction quality.

Because it is an inexpensive mount adapter, the anti-reflection processing is not very complex.


I think it uses a shade groove and black alumite as its lathe treatment, but it has a fairly glossy feeling ( as you can see in the picture). Generally, the total reflectance of black alumite treatment is about 5% up.

This time, I put the seal of the FineShut KIWAMI on mount adaptor connector (inner/body area) of about 6.5 mm in width. I’ll stick only half a circumference for the comparison.

mount adopter with FineshutKIWAMI Internal reflection prevention seal

Then it becomes like the picture above. The right side is the area pasted with FineShut KIWAMI. It firmly suppresses reflection. Let's go out to shoot now.

Let’s start the comparative test outdoor

It is a fine weather day at 9:30 am. It is still cold (5th March in Japan), and the temperature is around 5 ° C. Sunlight is strong, so it's a good situation for experiments.

What I would like to check first is how does light strike that inner wall of the mount adapter? Is there any light reflected?

 verify that the light hits the mount adapter

Yep, it is a direct hit!


It is confirmed that a strong spot source was hit when the mount adapter was connected with the Minolta MD50mm and the light source was directed at a certain angle from the sun. Even if the light is squeezed in, it will hit the same place just changing its spot size.


It is important to note that it is about 10 mm just before the sensor, but more than expected light. It is expected this will affect the photo image drastically.

※ Results are different depending on the lens used..


 Let's see how much this spot reflection can be suppressed by FineShut KIWAMI.

mountadopter with no anti-reflection treatment
mountadopter with FineshutKIWAMI anti-reflection treatment

The left is the unprocessed image and the right is the pasted image. It is evident that the reflection is suppressed a lot.

The Fineshut KIWAMI has a total reflectance of 1% or less. So far this is the best of our materials.


Now, we will compare the differences between the actual images.

This is the method I used for taking pictures. I placed the camera in an angle where light strikes the inner wall of the camera's body before the unprocessed part. Here, I can see the entire image is brighter with flares. On that point, I release the shutter.


Next, with the lens barrel as the rotation axis, rotate the camera 180 ° and take a picture with the same composition. The other half of the mount adapter is the part where the sticker is attached, so the light strikes there, which means that the image quality can be compared.

The left is the unprocessed image, and the right is the image after anti-reflection processing. It's hard to tell the difference when the pictures are minimized, so please view them in full screen. The flare present at the lower left of the screen has been reduced and the contrast has been improved.


Although the mount adapter used this time is also cheap and the head of the silver screw comes out to the wall, this does not have any effect on the flaring of the image.

For photographers who aim for the stars

It took me a long time to get the verification work done, but I think that just by looking at the raw results, it is clear that our anti-reflection seal can improve photo quality drastically. Even in the case above, it is better to use it instead of lens hood to cut off the flare.


We are confident that the anti-reflection performance of the product is very good compared to the genuine processing of the manufacturer, but since the manufacturer also takes countermeasures as far as the budget allows, the overall improvement in the optical performance is minimal to say the least. 


However, good optical products have a slight advantage. A slight improvement of 10, 20, and so on creates a clear advantage that anyone can see. We also supply optical components such as shading rings and aperture parts, but the manufacturers' commitment is tremendous.


(For example, for our light-shielding ring, in order to reduce the end reflection of a black PET film with a thickness of only 50 microns, we have to process and cut the edge of the inner part with a 45°. You can check the image below.)

"Internal reflection prevention seal, FineShut KIWAMI" is a product that aims for improvement. We hope that you will be interested as photographers aiming for new heights.


Even though it is an advanced material, You can buy it in just ONE CLICK!

Click site from the links below!

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