Anti-reflex paint for lens adapter

[MEPER]

I have this RAF-Camera adapter and when using it especially with flash I get flare.
Image attached shows how the internal of adapter seems to reflect light and I think this causes the flare.
Are there any good "DIY paint" you can use for making the internal of the adapter "anti-reflective"?
Think many adapters does not have the best anti-reflective inner surfaces.....?

[rosko]

Gluing some black velvet fabric could be an alternative solution ?

[MEPER]

Yes, maybe.....some kind of thin black felt?
I think for this conical shape......maybe paint will be easier....?
What does Nikon use for the internal parts of cameras, lenses etc.?

[Snoogly]

I only Googled, but there do seem to be solutions (pardon the pun)...

https://www.teleskop-express.de/shop/product_info.php/language/en/info/p8861_TS-Optics-anti-reflective-paint---matt-black-150-ml.html

https://www.amazon.co.jp/-/en/Black-Unbeatable-3-4-100/dp/B0887VMCYF

A good search term is: https://www.google.com/search?client=safari&rls=en&ei=spRGYMX1MKrfmAX1rq8g&q=flat+black+paint+for+telescopes&oq=anti+reflective+black+paint+camera&gs_lcp=Cgdnd3Mtd2l6EAEYADIHCAAQRxCwAzIHCAAQRxCwAzIHCAAQRxCwAzIHCAAQRxCwAzIHCAAQRxCwAzIHCAAQRxCwAzIHCAAQRxCwAzIHCAAQRxCwA1AAWABgvGVoAnACeACAAc8BiAHPAZIBAzItMZgBAKoBB2d3cy13aXrIAQjAAQE&sclient=gws-wiz

[MEPER]

Thank you!
The German "telescope-paint" seems perfect......38 Euros + shipping.....expected to cost a bit more than just normal paint......

[MEPER]

Maybe also this could be an option:
https://www.gerdneumann.net/english/instrument-building-parts-teile-fuer-den-fernrohrbau/totmatte-schwarze-optikfarbe-deep-black-optical-paint.html

[MEPER]

Ordered a small can of the "Albrecht" paint from Gerd Neumann.......

[Erik Lund]

I have used Humbrol #33 Matt Black for years for that application, also doesn't shine in [IR] Cost 2€ lasts for years.
It's also possible to buy "Lens Flocking" with sticky backing - purpose made for that application.

[Erik Lund]

I have used Humbrol #33 Matt Black for years for that application, also doesn't shine in [IR] Cost 2€ lasts for years.
It's also possible to buy "Lens Flocking" with sticky backing - purpose made for that application.

First image in this post by JA indicate 'a lot' of internal reflections 
https://nikongear.net/revival/index.php?topic=1426.msg20592#msg20592
Was later modified using a black Nikon lens cloth sponsored by Birna, also soaked up the last bit of moisture in the can,,, 

[MEPER]

Aha......a hole-camera using a beer can as lens?

I found the #33 paint locally....can try that also......
https://panduro.com/da-dk/search?q=Humbrol%20033%20black%20matt&t=articles

[Jack Dahlgren]

I don't know how durable this paint is, but it is very very black.
https://www.culturehustleusa.com/products/black-3-0-the-worlds-blackest-black-acrylic-paint-150ml?

Seems like it would be a good option.

[Erik Lund]

Yes, Pinhole camera using beer can 
Remember to stir the paint a very long time, you really need that to get the flat matt effect from Humbol Matt paints - I would say about 5 minutes and out in all corners of the little can!

[MEPER]

Ok......that was a long time....but probably to get all the pigments even distributed in the paint.......

[MEPER]

Ok.....that is "black".....I go with "Albrecht" and Humble #33 first and see how this works......probably most adapters we buy to use 3. party lenses could benefit from this.....

I don't know how durable this paint is, but it is very very black.
https://www.culturehustleusa.com/products/black-3-0-the-worlds-blackest-black-acrylic-paint-150ml?

Seems like it would be a good option.

[Jack Dahlgren]

Ok.....that is "black".....I go with "Albrecht" and Humble #33 first and see how this works......probably most adapters we buy to use 3. party lenses could benefit from this.....

The Humbrol enamel is going to be more durable for sure.