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[Rollei] Obsolete skills (was Why the 6-element lens for 3.5Fs)

The slide rule I inherited from my dad is a 10" Keuffel and Esser with
oodles of scales.  He used this in college (City College, then Cooper Union)
and had bought it USED for about $20.  His name and the initials of the
previous owner are carved in.  It also has a cigarette burn demonstrating
that the previous owner was doing a calculation with result 45.0.  My dad
went on to use a smaller, but still wooden, slide rule at work.

About 10 years ago, I stopped using it because the hairline was busted.  I
found a place in Fairfax, Virginia, which had a boxfull of these hairlines,
and we found one that fit.

When I taught Calculus, I used a slide rule to demonstrate logarithms.

There are a lot of similarities between these top of the line slide rule and
Rolleis.  Neither is made anymore (AFAIK!), both have been replaced by newer
products, and both have adherents/cult status.

As to right-handed versus left-handed, "The oddest thing about the Exakta
[VX1000] is that it was designed for left-hand use."  Bob Shell, "The Best
25 Cameras of All Time," Photo Techniques, Nov/Dec. 2001, pg. 31.


> Date: Sat, 03 May 2003 18:35:23 -0700
> From: Don Williams <dwilli10  >
> Subject: Re: [Rollei] Obsolete skills (was Why the 6-element lens for
> Message-ID: <>
> References: <E19C6S5-0003ir-HH  >
> - --=====================_24477734==.ALT
> Content-Type: text/plain; charset="us-ascii"; format=flowed
> At 06:17 PM 5/3/2003 -0700, you wrote:
> >At 07:30 PM 5/3/2003 -0400, you wrote:
> >>In <000401c311be$274752f0$55440a0a@Gostenin>, on 05/03/03
> >>    at 05:41 PM, "Dan Kalish" <kaliushkin  > said:
> >>
> >> >I was using a slide rule in the 6th grade.  I'm sure Jerry, since he
> >> >also went to Bronx Science, mastered slide rules.
> >>
> >>Are there more than three of us on this list?
> I think I made an error.  Would you believe:
> K&E  Log Log Duplex Decitrig?
> [That was THE thing to have in those days]  and I have no idea why this
> topic is on this thread.
> >It served me all through high school, college, and into engineering until
> >the HP 35 came out.
> >
> >I also have some metal and bamboo ones but they were never as smooth in
> >operation.
> >
> >I also have a cylindrical magnifier which clips onto the slider, required
> >in those days.
> >
> >
> >>-----------------------------------------------------------
> >>les clark / edgewater, nj / usa
> >>-----------------------------------------------------------
> >
> >
> >Don Williams
> >La Jolla, CA
> >