Hello, this is Teppei in charge of Koyo orient Japan Product division.
We are now selling "Lens hood Anti-Reflection strip" with using "FineShut SP" our ultra black material. Those kit can suppress stray light in the lens hood. Now, we have 9 types of products, but we are going to increase over 5 to 6 types by every month. Please check our update.
That's why there are about 30 types of lens hoods in our office. And as we checked all those samples, and often go checking of items to some stores, so we gradually realized the difference of policy between some companies for the lens hood about anti-reflection treatment on inner surface.
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 following photos.
At first, "Not Good" level ; lens hoods for relatively lower-price models with Sony, Canon, Pentax, and Fujifilm. Those are NO treatment inner surface or coated but not effective for anti-reflection. The left side two are the photo of such samples.
Next "Good" level, Those are coated by anti-reflection or inner ribs shape. TAMRON and SIGMA adopt inner ribs shape for them lens food. In case of Nikon, basically they adopt anti-reflective coating. I like appearance and finish Nikon lens But one demerit of anti-reflective coating is easy scratched.
Final, the topic is "excellent" items, Flocking finish. As you know, the performance of anti-reflection is the best, It's blacker than other finish by the photo.
Canon's policy, for relatively lower-price and mass-production models, have NO coating, but once if they are upper middle range model (ex. over around $ 1000) have adopted flocking finishes. In case of "L glade", basic finishing is flocking. Pentax seems to also have same finishing policy to upper middle range.
As the result, even some difference exist between makers, but the common policy is even they need to pay certain amount of cost to prevent stray light to upper middle range product. I think it means, stray light on the surface of lens hood have not a small effect on the quality of photograph.
Our FineShutSP is even 0.2mm but also has the same performance of anti-reflection to flocking finish, If you are interestied in the quality of pictorial image, please check our products “Lens hood Anti-Reflection strip”.