[pure-silver] Re: No More Below the Lens Polymax Filter Kits?
- From: "mail1" <mail1@xxxxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 4 Feb 2009 13:34:49 -0800
There are three versions of Zone VI VC heads. The first version used
separate large transformers, and Variac controls for each tube. This VC head
is very bright with short exposure times producing a paper ES 1.43, Grade 0
to ES .60 Grade 5. (ISO 100 equals ES 1.0) I use this unit with a Metrolux
Timer that adjusts for lamp output accurately. Using large transforms
produces high output from the tubes.
The second version used smaller transformers and electronic circuits to
control output. I suspect you might have this version. This design could
have issues with output and control. Generation 3 uses LED light sources
unfortunately I have not had an opportunity to use this model.
I also use the Aristo VCL4500. My unit has adjustments for both the green
and blue lamps producing a paper ES 1.40 Grade 0 to ES.40 Grade 5.
The Aristo tubes use colored glass that filters the frequency to a narrow
spectrum where as the first generation of Zone VI uses internal phosphor
coating only there for the frequency of light is a broader spectrum. This
broad spectrum reacts differently, and appears brighter to our vision.
I also use a durst 138 Condenser enlarger with Ilford filters the filters
produce range from ES 1.38 to ES .37 Changing the voltage on the bulb does
create subtle differences. I use a Metrolux timer with a Variac to control
the voltage of the bulb. I really like the Durst although I find it sometime
difficult to produce ideal negatives for a condenser enlarger hence the
reason for having the cold light systems.
Low pressure mercury vapor lights have a narrow non uniform spectral energy
output. Photographic paper is optimized for the use of filtered incandescent
light which has a very different spectral energy distribution. This
difference does show up in subtle ways.
Jonathan Ayers
[mail1@xxxxxxxxxxxxxxxxx]
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of john stockdale
Sent: Wednesday, February 04, 2009 3:42 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: No More Below the Lens Polymax Filter Kits?
Eric, I have a Zone VI VC head that I don't want, but I wouldn't
recommend it for various reasons. I can give you details if you're
interested.
Regards, John
=====================
Eric Nelson wrote:
> Thanks John I'm already on the lookout and have added aristo and zone
> vi to my saved searches on ebay. I'll have a chat w/Kodak tomorrow
> and see what the story is on the filters.
> Eric
>
>
> ------------------------------------------------------------------------
> *From:* john stockdale <j.sto@xxxxxxxxxxx>
> *To:* pure-silver@xxxxxxxxxxxxx
> *Sent:* Tuesday, February 3, 2009 11:59:18 PM
> *Subject:* [pure-silver] Re: No More Below the Lens Polymax Filter Kits?
>
> The Aristo VCL4500 with an RH Designs Stop Clock Vario is a sweet, if
> expensive, solution.
>
> John
>
> Eric Nelson wrote:
> > Man, and the list here was just touching on this subject recently
> too. So I did my online searches and have come up empty handed from
> Freestyle to Adorama to B&H to ebay.
> > Now /that's/ sad. At least the filters are still available and I
> can cut them down for the holders which I still have. Ilford's
> filters stink as I've been using them a month or so. The contrast
> jumps dramatically between 1/2 grades and exposure is nowhere near
> similar from one filter to the next using /*their*/ frakkin' paper.
> Maybe I just "owe myself" a VC head and be done with it.
> >
> > Sigh.
> >
>
>
============================================================================
=================================
> To unsubscribe from this list, go to www.freelists.org
> <//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.
No virus found in this incoming message.
Checked by AVG.
Version: 7.5.552 / Virus Database: 270.10.17/1934 - Release Date: 2/4/2009
8:24 AM
No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.552 / Virus Database: 270.10.17/1934 - Release Date: 2/4/2009
8:24 AM
=============================================================================================================
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:
