Bell & Howell 154mm Lens

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Terry - 21 Feb 2004 18:10 GMT

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

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Francis Roy - 21 Feb 2004 21:28 GMT

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

>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

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Terry - 21 Feb 2004 21:40 GMT

Ok - Thanks! Not adjustable. Must be a big projector for this to fit. Terry

> If the diaphragm is adjustable it is for taking movies, 16mm.
> It would give an image 6 times the normal lens.
[quoted text clipped - 5 lines]
> >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

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Richard Knoppow - 28 Feb 2004 21:18 GMT

> Ok - Thanks! Not adjustable. Must be a big projector for this to fit. Terry
> > If the diaphragm is adjustable it is for taking movies, 16mm.
[quoted text clipped - 7 lines]
> > >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
dickburk@ix.netcom.com

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Dan Fromm - 22 Feb 2004 23:52 GMT

> 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

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