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Photo Forum / Film Photography / Darkroom / May 2004

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Durst Laborator

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Alparslan - 16 May 2004 23:40 GMT
Hi,

I have recently purchased a durst laborator 1200 for a very reasonable
price. It came with the works. I am very exited. I checked the alignment
with the verselab laser aligner tool and it was perfect side to side and
needed adjustment for vertically. I have mostly figured out all the knobs
and other bits but also would like to make sure I do not miss anything there
is to know about this enlarger. This goes for alignment too.

I onder if anyone could point me a link where I can get info regarding the
issues I mentioned or where I can find an on-line manual.

Regards.
Nick Zentena - 16 May 2004 23:44 GMT
> Hi,
>
[quoted text clipped - 7 lines]
> I onder if anyone could point me a link where I can get info regarding the
> issues I mentioned or where I can find an on-line manual.

 Durst will likely mail you one for free. They sent me one for a 1000 and
that hasn't been made for at least 25 years.

    Nick
Laura Halliday - 17 May 2004 04:48 GMT
>   Durst will likely mail you one for free. They sent me one for a 1000 and
> that hasn't been made for at least 25 years.

When I hauled my L1000 home, it took about five minutes
to figure out what the knobs did. What do you need a
manual for?

This *was* my first "real" enlarger, by the way. It
came with a CLS450 dichroic head, the digital timer,
negative carriers and mixing boxes for 35mm, 6x6 and
4x5, and lenses to match. I never did find a good way
to do 6x7 with it, but got a good deal on a Saunders/LPL
670DXL, also with all the trimmings.

C'mon, folks, hurry! Go digital! Digital is wonderful.
Really. Once you go digital you'll never look back.
Honest. Just let me know when you do, so I can buy
your darkroom stuff really cheap. :-)

Laura Halliday VE7LDH     "Que les nuages soient notre
Grid: CN89mg                    pied a terre..."
ICBM: 49 16.05 N 122 56.92 W        - Hospital/Shafte
Nick Zentena - 17 May 2004 11:57 GMT
> When I hauled my L1000 home, it took about five minutes
> to figure out what the knobs did. What do you need a
> manual for?

 Even with the manual I still don't know the proper name for the type of
negative carrier it uses. Or for that matter the lenboards. If it hadn't
been for some posting in the google archives of this group I'd never been
able to figure out which recessed board it needed. That's with the manual-)

> This *was* my first "real" enlarger, by the way. It
> came with a CLS450 dichroic head, the digital timer,
> negative carriers and mixing boxes for 35mm, 6x6 and
> 4x5, and lenses to match. I never did find a good way
> to do 6x7 with it, but got a good deal on a Saunders/LPL
> 670DXL, also with all the trimmings.

 I've got the 401 Mark II head. 35mm and 6x7 carriers. All using the 4x5
light box.



     Nick
Nick Zentena - 17 May 2004 12:07 GMT
> negative carriers and mixing boxes for 35mm, 6x6 and
> 4x5, and lenses to match. I never did find a good way
> to do 6x7 with it, but got a good deal on a Saunders/LPL

 BTW I made a carrier for 4x5 out of black matt board. It works. 6x7 with
the smaller openning should be even easier.

   Nick
David Starr - 17 May 2004 22:55 GMT
L, also with all the trimmings.

>C'mon, folks, hurry! Go digital! Digital is wonderful.
>Really. Once you go digital you'll never look back.
>Honest. Just let me know when you do, so I can buy
>your darkroom stuff really cheap. :-)

Uhh....  Please go to the rear of the line.  I's a long one, btw.  :-)

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Alparslan - 27 May 2004 20:06 GMT
> >   Durst will likely mail you one for free. They sent me one for a 1000 and
> > that hasn't been made for at least 25 years.
>
> When I hauled my L1000 home, it took about five minutes
> to figure out what the knobs did. What do you need a
> manual for?

snipped

I would like to know by how much one density filter unit will change the
exposure time when everything else is constant.
Mike King - 29 May 2004 16:25 GMT
Durst is unique, their filter units are supposed to be equivalent to
logarithmic units.  In other words 30M+30Y+30C= ND 0.30.  In practice I
think you'll find that each paper has different speeds for different
emulsion layers and that emulsion layers are not sensitive to one color of
light (Bertram Miller calls this arasters (sp?)) so in practice a change of
say 30M will not mean a one f-stop change.  However, if you add 30 to all
three filters you will have approximately a one f-stop change in exposure.

Much easier to buy a good analyzer and learn to print from what is sometimes
known as a calibrated contact sheet.

Signature

darkroommike

----------

>
> > Nick Zentena <zentena@hophead.dyndns.org> wrote in message
[quoted text clipped - 12 lines]
> I would like to know by how much one density filter unit will change the
> exposure time when everything else is constant.
Michael Briggs - 30 May 2004 10:04 GMT
> snipped
>
> I would like to know by how much one density filter unit will change the
> exposure time when everything else is constant.
>  

Durst uses decimal density units, so 30 is really 0.30, which is a factor of
two.   Reading Kodak's literature, Kodak seems to use the same units, but
everyone agrees that the industry has two different units for enlargers, which
are usually named after Kodak and Durst.

Your question isn't very clear.  Are you talking about one of the color filters,
or the neutral density filter that some Durst heads have?   Graded contrast B+W
paper, variable contrast B+W paper or color paper?   The ND filter is easy for
all paper types....  ND 30 will halve the light reaching the paper.

For variable contrast paper, there are various tables, usually from the paper
manufacturer.  For example, if you search around on the Ilford website, there is
a pdf file "Contrast Control" that has tables for Ilford papers.

--Michael
Alparslan - 31 May 2004 21:10 GMT
"Michael Briggs" wrote :

> > snipped
>
> Your question isn't very clear.  Are you talking about one of the color filters,
> or the neutral density filter that some Durst heads have?   Graded contrast B+W
> paper, variable contrast B+W paper or color paper?   The ND filter is easy for
> all paper types....  ND 30 will halve the light reaching the paper.
snipped
> --Michael

Thank you Michael and Mike.

I have the CLS500 color head and it has a density filter along with the
three color filters. I do B&W work ( not by profession). The density filter
really helps when I get too short exposure times. I use multi grade ilford
paper and the instructions that come with it are very clear about the paper
speed for different grades. Moreover, there is a very useful chart in the
instruction sheet showing the two filter method by which it is possible to
keep the exposure time constant when changing color filters to go from one
grade to another. But this is not what I was talking about. It is the
density filter the Durst has. It goes up to 60 units and it means I guess, 2
stops.
regards
Alparslan
Laura Halliday - 17 May 2004 04:53 GMT
>   Durst will likely mail you one for free. They sent me one for a 1000 and
> that hasn't been made for at least 25 years.

When I hauled my L1000 home, it took about five minutes
to figure out what the knobs did. What do you need a
manual for?

This *was* my first "real" enlarger, by the way. It
came with a CLS450 dichroic head, the digital timer,
negative carriers and mixing boxes for 35mm, 6x6 and
4x5, and lenses to match. I never did find a good way
to do 6x7 with it, but got a good deal on a Saunders/LPL
670DXL, also with all the trimmings.

C'mon, folks, hurry! Go digital! Digital is wonderful.
Really. Once you go digital you'll never look back.
Honest. Just let me know when you do, so I can buy
your darkroom stuff really cheap. :-)

Laura Halliday VE7LDH     "Que les nuages soient notre
Grid: CN89mg                    pied a terre..."
ICBM: 49 16.05 N 122 56.92 W        - Hospital/Shafte
Michael Briggs - 27 May 2004 05:55 GMT
> Hi,
>
> I have recently purchased a durst laborator 1200
....

> I onder if anyone could point me a link where I can get info regarding the
> issues I mentioned or where I can find an on-line manual.

The US distributer is Jobo.  They have some information on their website.  Their
page about the L1200 lists the accessories that are currently available:
http://www.jobo-usa.com/products/durst_l1200.htm, including the somewhat
peculiar names that Durst uses.

They also have a FAQ at http://www.jobo-usa.com/faq/faqfrontpage.htm

There isn't much in the manual that is both non-obvious and not in the webpages
I listed.

--Michael
 
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