Field test! Improvement of image quality by using Fineshut anti-reflective stickers inside a lens mount adapter

Hi this is Teppei, from Koyo Orient Japan.


We have started general sales of the 'ultra-anti-reflective material': Fineshut KIWAMI, developed by our company this week. The sticker is made by laminating a PET-based adhesive to our proprietary material, making reducing reflections easier than ever! Its fantastic effect can be seen when applied to the inside of an inexpensive lens mount adaptor.


This time, I will use a Fujifilm X-H1 camera and a vintage Minolta MD50mm F1.7 lens attached via a MD-FX mount adapter, which only cost about JPY 4,000.


Why use a MD lens? Well, because of its, cheap price depiction quality! ;)

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


I think it uses grooves cut into the anodized aluminum body by a lathe in attempt to reduce reflections, but it has a fairly glossy finish ( as you can see in the picture). Generally, the total reflectance of anodized aluminum is about 5%.

For this test, I stuck Fineshut KIWAMI on the mount adaptor connector (inside and outside body area) of about 6.5 mm in width. I’ll stick it only on half, so that you can compare the effects with and without the sticker when shooting.

mount adopter with FineshutKIWAMI Internal reflection prevention seal

Let’s start the comparative test outdoor

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

What I would like to check first is how does light strike the 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 image is without Fineshut KIWAMI, and the right image is with Fineshut KIWAMI applied. It can be clearly seen that the internal light reflections are significantly suppressed when using Fineshut KIWAMI in the right image. This is because Fineshut KIWAMI has a total reflectance value of less than 1%, which is so far the darkest of our products.


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


The method I used for taking the pictures is as follows: I placed the camera at an angle where sunlight hits the inner wall of the adapter so the effect of the anti-reflection strength can be compared. 

The left image is without Fineshut KIWAMI, and the right image is with KIWAMI applied. It's hard to tell the difference when the pictures are minimized, so please view them in full screen. The flare at the lower left of the image has been reduced and the contrast has been improved.



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

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