Making f-stop scale for "generic" timer

Irvine_Short · Nov 17, 2010

Hi All,

is there any reason why I should not take a screwdriver to my enlarger timer and insert an f-stop scale?

Or even just use some sort of luminous marker to mark 5, 7, 10, 14, 20, 28, 40 and 56 seconds?

Any tips out there on doing this?

--Irvine

Terrence Brennan · Nov 17, 2010

A calculator for f/stop calculations

FWIW, I keep a calculator in the darkroom and use that to calculate exposure changes.

It's an old Novus, which boasts a red LED display, and uses a 9-volt battery. I can use it with paper out and not worry about fogging it. I bought it in the Eaton's Bargain Basement in Toronto, in 1976, for $15.00.

Canadian APUGgers will no doubt remember Eaton's AND their bargain basement...

Nicholas Lindan · Nov 17, 2010

There are several scales available to do this.

See the Darkroom Automation support files web page for a dial for GraLab style timers.

makanakijones · Nov 17, 2010

I don't want to play with your money but If I can give you an advice, buy a new f-stop timer, rh or da.

Making f-stop scale for "generic" timer

Irvine_Short

Terrence Brennan

Nicholas Lindan

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makanakijones

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