variable contrast filters and cold light heads

[Mark Schmidhofer]

I'm sorry for asking what I suspect must have been answered but I
couldn't find it on dejanews....
I have a cold light head (zone vi)--do standard VC filters work as they
do with condenser light sources? I glean they do not--are there ways
around it? Thanks
Mark Schmidhofer

[Scott Dorsey]

No, they don't.
No, there's no way around it, really.

Time to go back to regular paper.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[RGOOD4X5]

>I have a cold light head (zone vi)--do standard VC filters work as they
>do with condenser light sources? I glean they do not--are there ways
>around it? Thanks

Mark,

Contrary to what some purist may say, you can use VC papers with your cold
light head. I've been doing it for 15 years.
First, you'll need to do a little experimenting to find what works best for
you. I place a 40cc yellow filter from a set of Beseler color printing filters
just below the head, above the diffuser. This brings the light back to about a
neutral position (as in grade 2 on VC paper).
You can soften even more by adding more yellow.
With the 40cc yellow in place you can try using below the lens VC filters to
achieve the desired results. Granted, it's not perfect but it gives you some
options to play with
Good luck
Russ Good
Bothell, Wa.

[Richard Knoppow]

Mark Schmidhofer <ksc...@mail.city-net.com> wrote:

>I'm sorry for asking what I suspect must have been answered but I
>couldn't find it on dejanews....

>I have a cold light head (zone vi)--do standard VC filters work as they
>do with condenser light sources? I glean they do not--are there ways
>around it? Thanks

> Mark Schmidhofer
>

Zone VI supplies two versions of their lamphouse, one has the
standard cold light and the other has a special version which works
better with VC paper. The standard lamp is very blue, the VC version
is warmer. Normally a cold light head must have a yellow correction
filter to compensate for the abundance of blue light in order to work
with VC filters. Even with the filter the range of contrast available
is not as great is with an incandenscent source. Calumet is the
distributor of Zone VI products and can identify which lamp you have
and suggest correction filters for it. 1-800-CALUMET
---
Richard Knoppow
Los Angeles, Ca.
dick...@ix.netcom.com

[Ken Hatch]

Mark,

There are several ways around "your problem". You can experiment and find
what filters will give prints you like with your negatives also Arista makes
a replacement cold light tube that is for use with VC filters. An even
better way is to use split filter or what I call two light printing. If you
are interested I will send a private post on how to use filters to two light
print.

Plato said in THE REPUBLIC "opinions without knowlege are shameful and ugly
things" it's sad how many shameful and ugly things are posted on this forum.

ken hatch
http://home.swbell.net/khatch1

Mark Schmidhofer wrote in message <65uqtn$obv$1...@dns.city-net.com>...

[hagu...@student.gu.se]

In article <kludgeEK...@netcom.com>,

klu...@netcom.com (Scott Dorsey) wrote:
>
> In article <65uqtn$obv$1...@dns.city-net.com> Mark Schmidhofer
<ksc...@mail.city-net.com> writes:

> >I'm sorry for asking what I suspect must have been answered but I
> >couldn't find it on dejanews....
> >I have a cold light head (zone vi)--do standard VC filters work as they
> >do with condenser light sources? I glean they do not--are there ways
> >around it? Thanks
> > Mark Schmidhofer
> >
>

> No, they don't.
> No, there's no way around it, really.
>
> Time to go back to regular paper.
> --scott
> --
> "C'est un Nagra. C'est suisse, et tres, tres precis."

Why not use the kind of warming filters one uses to shoot with tungsten
films in daylight? It reduces the color temperature 5000-3200K. Just an
idea, never tried myself...

Håkan Gunnarsson
Göteborg, Sweden

-------------------==== Posted via Deja News ====-----------------------
http://www.dejanews.com/ Search, Read, Post to Usenet

[Adolph B. Amster]

They don't but you can still use them quite effectively. Just don't
expect the filter number to be similar to what you might have expected.
Run some tests and confirm this for yourself. I've used the filters with
a cold light for years and am satisfied.

--

Delete "REMOVE" from address to reply
Adolph B. Amster
do...@REMOVEridgecrest.ca.us
12/04/97 10:48
Using OUI PRO 1.5.0.2

[wei...@getnet.com]

In article <kludgeEK...@netcom.com>, klu...@netcom.com (Scott Dorsey)
wrote:

> In article <65uqtn$obv$1...@dns.city-net.com> Mark Schmidhofer
<ksc...@mail.city-net.com> writes:
> >I'm sorry for asking what I suspect must have been answered but I
> >couldn't find it on dejanews....
> >I have a cold light head (zone vi)--do standard VC filters work as they
> >do with condenser light sources? I glean they do not--are there ways
> >around it? Thanks
> > Mark Schmidhofer
> >
>
> No, they don't.
> No, there's no way around it, really.
>
> Time to go back to regular paper.
> --scott

wrong!

Use a yellow filter in addition to your usual variable contrast filters
and you'll be just fine. I don't recall how many points or anything but
just get some yellow in there.

I do it with Polymax and it does just fine.

Steve

[Roger Cole]

All the yellow does is reduce the speed and the contrast. You could
get the same contrast by using a softer filter by itself, provided you
aren't already using the lowest contrast filter you have. In that
case, yes, add some suplemental yellow.

I have a very old Omega CL head I happened to get thrown into the deal
when I bought my D2 with the variable condenser head. I tried laying
VC filters on top of the neg carrier and ran some tests. What I found
was that, while you _could_ get normal contrast results, the trade
offs were not worth it. Namely, the speed dropped so precipitously,
and changed so much with filtration changes, that it was ridiculous
really. If I remember correctly I had to use something like a grade 0
filter (Ilford) to get a normal looking contrast, and the print time
was about 70 secs at f/5.6! Admitedly, this head is slow to start
with and uses a standard circular household flourescent tube. Others
might get better results.

Best bet would be to get one of the newer Aristos with the full
spectrum tubes. I have seen charts published in _D&CCT_ (as it was
then I believe) showing step tablet results with this head and it did
in fact produce pretty even grade spacing and a full range of grades.
Best of all, these heads only cost a bit over $200 brand new.

Roger Cole

[guest]

Zone VI makes filters for their cold light heads.