according to the Weber-Fechner-law our visual perception reacts in a
logarithmic way to lightness/brightness. That is the intensity has to
increase by steps of equal ratio (1,2,4,8, etc) in order to be
perceived as double as bright. Does anybody know what makes silver film

I'm getting back into darkroom work after many years, because my 13 year
old daughter is interested.  I don't think we will be using the darkroom
more than 4-5 times a month (two rolls of film and/or maybe 10 8x10
prints each time).  We're using Ilford film.  I'm interested in ...

I recently looked at a local studio's price list and was shocked. An 8X10
was going for $40 for a wedding shoot. Is this high low or in the middle?
Thx.

_____
Hello,
I have an old but very clean copy of "Simplified Color Processing
Formulas" and "150 Black-and-White Photographic Formulas" published by

I might be acquiring a medium-format camera soonish and was just
checking out what the current crop of flat-bed scanners can do
(I have a dedicated film scanner for 35mm but it can't do MF.)
I stumbled upon the Epson Perfection V750 and something caught my eye:

I gave a 4x5 Graphic to a chap who's a bit poor.
What's the recommended dilution of Dektol and Efke 25 film? Any clue? Would
it even work half-bad?

September 14, 2006, from Lloyd Erlick,
I haven't had to buy selenium toner since
1999, when I bought two one gallon
containers. Now I wish I had bought five or

i'd like to set-up a darkroom in my apt. (ive always only worked in public
labs...highschool. college, etc. )  i have a standard ceiling light fixture
that takes standard 40 or 60 watt bulbs. I am curious as to what i can do to
transform it into a (makeshift) safe light ? I will be ...

with a sub-$500.00 scanner that is. i have heard things about the epson
4990, canon 9950, and a minolta too. i need decent results. i know drum
scanning is the best way, but does anyone get respectable (examples???)
results?

If I get negatives with consistently missing shadow and/or highlights, could it
be because there's something wrong with my Xtol developer? The previous two rolls
(fp4+, tri-x 400) were developed with Xtol out of the same bottle:
The fp4+ with 1+0 dilution, 8 minutes at 20C. Tri-x ...

I usually tone my negatives in dilute (1:30) KRST, but I've never done this
with my films developed in PMK. I can't think of any reason why I shouldn't,
since I believe that the KRST has a positive ph & shouldn't detract from the
stain. Any other opinions?

Hi, I am looking for a developing tank for our 3 meter (or 10') long
35mm B/W film from a home-made camera.  want to keep the film
continuous without cutting.  I'v checked JOBO tanks but didn't find a
good one.  I am not sure if 2500 can hold 3 meter 35mm film.  Any one

A #8B Faber-Castell 9000 pencil does a good job of
making notes on the back of RC B&W prints.  I like to
jot down exposure data when I make a print so I can
make some sense of the printing session on the next

I don't know anything about enlargers. I got this thing to use the
column but there are some parts I don't need, including the switch, an
image holder, the big lens, the small lens, and the big round top
thing (like I said, I know nothing about 'em).

I'm looking to buy a personal use mat cutter, and the following seem
to have what I need and be in the right price range.
Alto's 4505
Logan 450+