Hi,
I have not used NP400 with Rodinal 1+25, but it used to be my standard film with Rodinal 1+50 - I rated the Neopan 400 at 250, and developed in Rodinal 1+50, 20?C, 30Sek. constant inversions, then 2 inversions at the beginning of every minute, for 9 minutes.
How did you measure - through the filter with your camera, or qith a hand-held lightmeter? It is not a very good idea to measure through a red filter, as a lot of camera-integrated meters' red-light sensitivity does not correspond to that of B&W film - better use a hand-held meter or meter without the filter in place first, then dial in the correction factor for the red filter (depending on how dark the red is, the factor is usually around 8x - meaning, you have to open up 3 stops).
What effect did you want to achieve with the red filter in the first place?
Roman
I have not used NP400 with Rodinal 1+25, but it used to be my standard film with Rodinal 1+50 - I rated the Neopan 400 at 250, and developed in Rodinal 1+50, 20?C, 30Sek. constant inversions, then 2 inversions at the beginning of every minute, for 9 minutes.
How did you measure - through the filter with your camera, or qith a hand-held lightmeter? It is not a very good idea to measure through a red filter, as a lot of camera-integrated meters' red-light sensitivity does not correspond to that of B&W film - better use a hand-held meter or meter without the filter in place first, then dial in the correction factor for the red filter (depending on how dark the red is, the factor is usually around 8x - meaning, you have to open up 3 stops).
What effect did you want to achieve with the red filter in the first place?
Roman
http://www.pbase.com/romans
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Morgens ist es am schlimmsten, da fängt der Tag an.
- Sven Regener
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Morgens ist es am schlimmsten, da fängt der Tag an.
- Sven Regener
