[pure-silver] Re: OT: Brumberger MF Slide Projector

I've noticed quite a number of projection lenses offered on Ebay and surplus
places that might offer you an opportunity to upgrade.  Might do a google
and see what's out there that might fit or be made to fit.

----- Original Message -----
From: "Malcolm & Sylvia Brickwood" <m_s.brickwood@xxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, November 26, 2004 6:03 AM
Subject: [pure-silver] Re: OT: Brumberger MF Slide Projector


> Thanks Richard. Knowing that it's a low cost product is a great help
> and probably explains the performance because that's exactly how it is
> performing! I had no idea where it fitted in the quality spectrum. I'll
> check per your suggestion and report back.
>
> Thanks -
> Malcolm
>
>
> On Nov 25, 2004, at 9:52 PM, Richard Knoppow wrote:
>
> >
> > ----- Original Message -----
> > From: "Malcolm & Sylvia Brickwood"
> > <m_s.brickwood@xxxxxxxxxxx>
> > To: <pure-silver@xxxxxxxxxxxxx>
> > Sent: Thursday, November 25, 2004 8:24 PM
> > Subject: [pure-silver] OT: Brumberger MF Slide Projector
> >
> >
> >> We've recently been given a MF slide projector which is
> >> something
> >> always wanted but never justified. It's a Brumberger Model
> >> 1406 and is
> >> fitted with a Brumberger Anastigmat coated 5" f/3.5 lens.
> >> Somehow it
> >> does not look very sharp either in absolute terms or
> >> compared with our
> >> Leica Colorplan-P2 1.25/90 (on a Leica Pradovit P600 IR
> >> actually). The
> >> optics on the Brumberger MF projector are bit dusty but
> >> nothing
> >> serious.
> >>
> >> Does anyone know what performance should be expected from
> >> this lens?
> >>
> >> Thanks -
> >> Malcolm Brickwood
> >> Santa Clara, CA
> >>
> >
> >      My memory is that Brumberger was a rather low cost
> > projector. I have no idea who actually made the lenses or
> > what type they are but the poor performance is probably
> > normal. Remember, you are comparing it to a very high
> > quality projector.
> >      You may be able to discover the construction of the
> > lens by counting reflections. Even though the reflections
> > from single coated lenses are dimmer than those from
> > uncoated glass they are still pretty bright. If you see any
> > very dim reflections they are from a cemented interface. My
> > suspicion is that this is a triplet of some sort.
> >
> > ---
> > Richard Knoppow
> > Los Angeles, CA, USA
> > dickburk@xxxxxxxxxxxxx
>
>
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