Fitting lenses to cameras

[camerart]

Hi,

I have some old lenses that I have collected over the years. From aircraft cameras, News paper print cameras, etc. Many of them have Focus in inches.

I have a 600D camera and have sent for adaptors. Next I want to make tubes to fit the lenses to the adaptors. I will need a way of blacking out the inside of the tubes, and think of matt spray. I am a bit wary as this paint will be directly connected to the innerds of the camera, screen etc.

Does anyone have experience in this type of thing please?

Cheers, Camerart

[Thailander]

Good luck getting replies on this one. Might be best with rubberised paint but I accept no blame if damage is done.

[Naturalist]

I would not use paint, but it may be worth it to machine the tubes from aluminum and then black anodize. No issues with flaking then.

[camerart]

Thanks for both answers, I'll do a bit of experimenting.

Of course, I would not blame anyone for their suggestions.

Cheers, Camerart.

[ZoneV]

I do a lot of lens modifications.
In adapter tubes possible bigger diameter are good, and groovings like in screw holes.
How black black color really is, is a question of the viewing angle. Many black surfaces look grey when you look at 10° angle to the surface. This is a problem in lenses and cameras.
I use black spray (do not remember when I used it on a adapter ring and such). Very often I use a black paint pen. And somtimes I use a kind of velvet adhesive foil.
Up to now I have no problems with all this.

Here you see the black innards of a Canon Fd 500/4.5L lens - with a part velvet foil (the darker part):


A tinkerer posted images about how bad the quality of a Canon FD 300mm 1:2.8 lens on digital cameras is - but he has not thought about this surface reflections on black colored tubes. With better blackening he could solve this.

I use bellows and sometimes old macro tele converters as focussing unit - here on a Som Berthiot projection lens:


What lenses do you have - sounds very interessting with aircraft cameras and such!