Not that I recommend taking them apart for this:

This is the world's blackest material - and it's now available as a spray paint (http://www.telegraph.co.uk/technology/2016/03/18/this-is-the-worlds-blackest-material---and-its-now-available-as/)

The world's blackest material, made by British firm Surrey NanoSystems, is now available in spray paint form. Vantablack, first created in 2014, uses "carbon nanotube matrix" to absorb virtually all incident light - and makes three dimensional objects appear two dimensional, as their surface shape becomes virtually invisible."

See here: Blacker than original Vantablack! - YouTube

The blacker / more non-reflective the side surfaces are, the less that light scatter will interfere with your desired image.

Andrew

But it has to be heated to around 100 Celsius to undergo the reaction to produce the carbon nanotubes that absorb the light. Not sure if they recommend many lenses getting that hot.

Might be great material for a backdrop, light spill won't matter as the reflectivity is so low.

I thought it was still unbuyable by normal mortals at this point?

You guys have seen the Chicago bean is now coated in this, right?
If not, Google it. It's... Just wow.

You don't need to make the whole lens this hot, just the lens casing as it would be applied to the inside of this to eliminate internal spill.

Andrew