Re: maco 4x5 developing - first results

[Cor Breukel <cor@xxxxxxx>]

Hai Joe,

I also just shot my first 4 sheets of Maco 820, and I just made contacts
of them: they look very promising!

I use a 89b filter and I rated the film at 16 asa, I processed in
MACO's  LP Docufine LC liquid developer, dil 1+4, in a JOBO for 6.5
minutes at 22 degC. On your #093 filter: take a look at WJ's home page
http://www.a1.nl/phomepag/markerink/irfilter.htm, and you'll see that
this filter starts transmiting at 790 nm, 50% at 850 nm. If we assume
that the MACO 820 film has a peak at 820 nm, you can not expect to have
left a lot of "sensitivity", maybe you can try a 89b filter?

Good luck and keep us posted!

Best,

Cor

Joseph O'Neil wrote:
> 
>         Have not tried to print them yet, but I shot my first 4 sheets of Maco 820
> last evening, and developed them.  The first two I metered at 100 ISO with
> a Pentax Spotmeter (analog)  and used a B+W #041 filter - it is a deep
> orange & red colour, not quite either red or orange.  The next two I
> metered at 12 ISO and shot through a B+W # 093.
>         I developed in Rodinal for 12 min at 1:50 ratio in a Jobo tank on a
> motorized base.  I use this time for my Tri-x shot at 200 ISO (varied by a
> minute or two) so i thought I would try the Maco in this combination.
>         The shots fitlered through the 093 filter are way too thin to
> print.  Looks like I need another 3-4 stops, but I will have to experiment.
>         The negatives through the 041 filter came out nice however.  A wee bit
> thin for my tastes, compared to the look of my tri-x or HP5 negatives in
> 4x5, but not bad.  Problem is I have not printed them yet so they might be
> right on, but I think maybe one extra stop will get them where I personally
> like them.  Again, I have not printed them, but the negatives look a lot
> like Konica 750.
>         Next few shots I plan to try through the orange-red filter at 50 ISO
> and  maybe at 25 ISO through a  plain 25A red filter.
>         So there you go, if anyone is looking for some guidelines, but take with
> the proverbail grain of salt.  I develop my negatives to match the hardness
> of my water, the enlarger I use, the paper i use, and a thousand other
> variables.  Give me a couple weeks, I'll try and get some shots online, but
> untill then:
> Maco 820 plus  orange/red filter at 50 to 100 ISO plus Rodinal 1:50 for
> 12min (20C), constant agitation in rotating tube, looks good.
>         The #093 fitler - that I'll have to work on.  Any suggestions?
> joe
> 
> http://www.oneilphoto.on.ca
> http://www.multiboard.com/~joneil
> 
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