[pure-silver] Newton... Re: donut solution; enlarger lens problem
- From: "Ken Hough " <k4sb@xxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 11 May 2007 16:13:16 -0500
good ol Issac not only divided light but also worked on the understanding
of simple machines. The list is numerous, just go here:
http://en.wikipedia.org/wiki/Issac_newton
Ken
I'm not sure, but didn't Newton discoverd the breaking of light by means
of
a prism?
Cheers,
Michiel Fokkema
Shannon Stoney wrote:
> Are Newton rings really named after Isaac Newton? If so, why?
>
> --shannon
>
>
> On May 11, 2007, at 11:59 AM, Jim Brick wrote:
>
>> As I said days ago... the image looked like Isaac himself paid you a
>> visit!
>>
>> Plain glass in contact with the film BASE = Isaac Newton visit.
>>
>> Frosted glass, ground glass, anti-Newton glass in contact with the film
>> BASE = no Isaac Newton visits.
>>
>> Isaac Newton does not typically visit the emulsion side of the film.
>>
>> The emulsion should be facing the enlarger lens and be against plain
>> (hopefully optically flat) glass.
>>
>> If you want to flip the image, ie, emulsion up, this poses another
>> problem since the film base is now in contact with the clear, very
flat,
>> smooth, lower glass. In this case, use a very thin construction paper
>> mask around your neg in order to move the glass/film BASE junction
>> slightly apart. The film BASE is not squashed tight to the glass thus
>> reducing the Isaac Newton visit. The thickness of the mask will be
>> determined by trial. It may take several thicknesses of black
>> construction paper or a very thin piece of black cardboard.
>>
>> Jim
>>
>>
>> At 10:27 AM 5/11/2007 -0500, Shannon Stoney wrote:
>>
>>> Maybe that was the notorious Newton ring. I thought the frosted glass
>>> WAS anti-Newtonian glass, but maybe it wasn't, or maybe I installed it
>>> wrong.
>>>
>>> --shannon
>>
>>
========================================================================
>> =====================================
>>
>> To unsubscribe from this list, go to www.freelists.org and logon to
your
>> account (the same e-mail address and password you set-up when you
>> subscribed,) and unsubscribe from there.
>>
>
>
=========================================================================
> ====================================
>
> To unsubscribe from this list, go to www.freelists.org and logon to your
> account (the same e-mail address and password you set-up when you
> subscribed,) and unsubscribe from there.
>
>
===========================================================================
================================== To unsubscribe from this list, go to
www.freelists.org and logon to your account (the same e-mail address and
password you set-up when you subscribed,) and unsubscribe from there.
Ken Hough Photographic Repair Service
Specializing in the Complete restoration of
Deardorff View Cameras
Est 1982
www.deardorffcameras.0catch.com
219 462 0281
---
avast! Antivirus: Outbound message clean.
Virus Database (VPS): 000739-3, 05/11/2007
Tested on: 5/11/2007 4:13:20 PM
avast! - copyright (c) 1988-2007 ALWIL Software.
http://www.avast.com
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
