Daft Question.... Waterhouse slot on old lenses

[hoffy]

Hey Folks,

I just recently got my hands on a nice little Cooke Triplet from a magic lantern. This is the first lens that I own that has a Waterhouse stop slot.

I hope this doesn't seem to daft, but if I am not using stops (which I'm not), do I need to cover the slot? Will this cause light leak issues?

Cheers

 

[removed account4]

hi hoffy

people will likely tell you that you don't need to cover it
but i have a few lenses with slots in them
and i put a piece of cheap black masking tape over them
cause i am kind of paranoid

have fun!
john

 

[Jim Jones]

Taping the slot keeps bugs and anything else from reaching the interior surface of the lens.

 

[Ces1um]

I have lomography's daguerreotype lens. If I shoot outdoors in sunlight without an aperture plate in, I get results like this:

https://www.lomography.com/homes/ces1um/albums/2131541-daguerreotype-photos/21693707

I would recommend either using an aperture plate or covering the slot, especially in sunlight.

 

[darkroommike]

You may have a gem, I am not sure why a projector lens would have waterhouse stops, this may be a camera lens someone adapted to a projector.

 

[hoffy]

FWIW, the lens is a Niklas Projektions Objektiv. The focal length comes in at around 150mm and is estimated to be around F3.5

Thanks for the replies. A bit of tape it is then!