Exposure change for new enlargement:
(
/
) ^ 2 x
=
( New Length / Original Length ) ^ 2 x Original Time = New Exposure
Exposure change by f/stops:
x (2 ^
) =
Original Exposure x (2 ^ Number of Stops) = New Exposure
Dilutions:
@ 1 +
=
:
Volume @ 1+Dilution = Stock : Water
Percent Solutions:
Stock A Strength
Stock A Quantity
Required Strength
Stock B Strength
Stock B Quantity
Filter Settings:
Ilford
Kodak
Durst
Kodak
Dunco
DeVere
Chromega
Beseler
Jobo
Kaiser
Omega
Paterson
Simmard
LPL
Meopta
Leitz
Grade 0
Grade 0.5
Grade 1
Grade 1.5
Grade 2
Grade 2.5
Grade 3
Grade 3.5
Grade 4
Grade 4.5
Grade 5
Durst
Kodak
Grade 0
Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Y:
M:
Y & M filtration for Paper, Enlarger, Grade selected
Centigrade and Fahrenheit conversions:
DegC=
DegF
DegC = (DegF - 32) x 5/9
Grams, Grains and Ounce conversions:
grains =
grams =
ounces
grains x 0.0685 = grams = ounces x 28.35
Millilitres and Fluid Ounce conversions:
fl.oz (uk) =
ml =
fl.oz (us)
fl.oz (uk) x 28.4 = ml = fl.oz (us) x 29.6
Litres and Gallon conversions:
gallons (uk) =
l =
gallons (us)
gallons (uk) x 4.55 = l = gallons (us) x 3.79