New ortho 120 film from Foma

[Andrew O'Neill]

I hoped it would work but I had doubts with an ortho film. She dispelled those too ...

It also does an excellent job with Ferrania's Orto 50.

 

[schyter]

It also does an excellent job with Ferrania's Orto 50.

many thanks ... I have a couple of Orto Ferrania rollers

 

[MattKing]

Your source for this?
I hardly can imagine they never got the idea to use normal sensitometers and simply put a pinhole before it.

My source at Eastman Kodak - who definitely would know!
Apparently there is no known practical way to modify the normal sensitometers in a way that will allow them to both produce and measure those low light levels in a way that is sufficiently accurate to produce repeatable and consistent results.
And there is no business case for spending the $ necessary to research, design and build such a sensitometer themselves.

 

[Roger Cole]

No, they are sensitised exactly for the purpose they were intended. Nothing "too" there. Using surveillance and aero film makes them not too sensitised but used outsided their specs.


You mean a green filter.

Sigh. "Too" red sensitive for MY tastes at times. Duh. And I am not talking about surveillance and aero films.

And yes, you're right - green. Red transmits red or course. You'd want to reduce it. My mistake.

 

[darkroommike]

Maybe a dumb question, but couldn't a person get basically the same effect as an ortho film by shooting a panchromatic film through an red-blocking appropriate filter?

The other reason to shoot "ortho" is that it can be loaded and processed under red safelights.