Hello, this is Teppei in charge of Koyo orient Japan's Product Division.
We are now selling "Lens Hood Anti-Reflection Strip" using our ultra black material, "FineShut SP." These kits can suppress stray light in the lens hood. Now, we have 9 types of products, but we are planning to increase over 5 to 6 new types by every month. Please check our updates.
That's why there are currently about 30 types of lens hoods in our office. As we checked all those samples and other samples from different stores, we gradually realized the difference of policy between some camera companies for the lens hood in regards to anti-reflection treatment on inner surfaces.
First of all, the degree of anti-reflection treatment can be divided into the following three categories according to my own discretion.
|Excellent||: Flocking finish|
|Good||: Nikon's anti-reflective black coating and inner rib shape|
|Not good||: No coating|
It looks like this in the following photo.
Let's begin with the, "Not Good" level; here are a couple of examples of lens hoods for relatively lower-price models with Sony, Canon, Pentax, and Fujifilm. These do NOT have inner surface treatment nor are they coated so these are not effective for anti-reflection.
Next, let's move on to the "Good" level. These are coated by anti-reflection or have inner ribs shape. TAMRON and SIGMA have adopted inner ribs shape for their lens hoods. In the case of Nikon, they basically have adopted anti-reflective coating. I like the appearance and finish of the Nikon lens however one demerit of anti-reflective coating is that it can be easily scratched.
Finally, the best part of this blog, the "Excellent" samples with Flocking finishes. As you know, the performance of anti-reflection is the best and as you can see it's blacker than the other finishes in the photo above.
Canon's policy, for relatively lower-price and mass-production models, have NO coating, but for their upper middle range models (ex. around $ 1000), they usually have adopted flocking finishes. For example, basic finishing of their "l grade" cameras have flocking finishes. Pentax seems to also have the same finishing policy for their upper middle range models.
In result, some differences exist between makers but, as a common policy, they pay certain amounts of cost to prevent stray light for their upper middle range products. I believe this means that stray light on the surface of lens hood has a large effect on the quality of photographs.
Our "FineShutSP" is about 0.2mm thick but it has the same performance for anti-reflection in comparison to a flocking finish. If you are interested in the quality of pictorial images using our products, please check them out at “Lens hood Anti-Reflection strip”.