Bell & Howell 154mm Lens

I have an old (believe 1940's) Bell & Howell Type I - 6 inch - f/2.5
E.F.L. 154mm lens. Anyone know what it is or was used for? Thanks, Terry

If the diaphragm is adjustable it is for taking movies, 16mm.
It would give an image 6 times the normal lens.

If the diaphragm is not adjustable it is a projection lens for 16mm movies.

Francis in VT




Terry wrote:

I have an old (believe 1940's) Bell & Howell Type I - 6 inch - f/2.5
E.F.L. 154mm lens. Anyone know what it is or was used for? Thanks, Terry

Ok - Thanks! Not adjustable. Must be a big projector for this to fit. Terry
"Francis Roy" wrote in message
...
If the diaphragm is adjustable it is for taking movies, 16mm.
It would give an image 6 times the normal lens.

If the diaphragm is not adjustable it is a projection lens for 16mm
movies.

Francis in VT




Terry wrote:

I have an old (believe 1940's) Bell & Howell Type I - 6 inch - f/2.5
E.F.L. 154mm lens. Anyone know what it is or was used for? Thanks, Terry

"Terry" wrote in message ...
I have an old (believe 1940's) Bell & Howell Type I - 6 inch - f/2.5
E.F.L. 154mm lens. Anyone know what it is or was used for? Thanks, Terry

It is probably a 6" fixed-aperture version of the 7"/2.5 Aero Ektar.
B&H made them, and I've seen one other on eBay last year. There was
recently a 6"/2.5 fixed-aperture Aero Ektar on eBay, too.

Cheers,

Dan

"Terry" wrote in message
...
Ok - Thanks! Not adjustable. Must be a big projector for
this to fit. Terry
"Francis Roy" wrote in message
...
If the diaphragm is adjustable it is for taking movies,
16mm.
It would give an image 6 times the normal lens.

If the diaphragm is not adjustable it is a projection
lens for 16mm
movies.

Francis in VT




Terry wrote:

I have an old (believe 1940's) Bell & Howell Type I - 6
inch - f/2.5
E.F.L. 154mm lens. Anyone know what it is or was used
for? Thanks, Terry



If its fixed aperture it could also be from a 35mm slide
projector, B&H made them for a while. The barrel will be
considerably larger than a 16mm projection lens. 16mm
projection lenses also frequently have threads around the
barrel for focusing.
B&H didn't build lenses so it will have been made for
them by someone like Ilex.


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Richard Knoppow
Los Angeles, CA, USA