foma 100/200 spectral sensitivity

Discussion in 'B&W: Film, Paper, Chemistry' started by puketronic, Nov 12, 2012.

  1. puketronic

    puketronic Member

    Nov 15, 2011
    How is the spectral sensitivity of these films.

    Basically, I want to know if I will expect to get gray skys without a filter.

    I'm really not so familiar with the technical details of films but some films give me gray skys (modern emulsions) and others do not (traditional emulsions) without yellow filter. how does foma compare?

    I ask because some of my point and shoots do not take filters (atleast not practically). I will test but an informed decision will save me money and time. More importantly, any unfiltered examples?
  2. Athiril

    Athiril Subscriber

    Feb 6, 2009
    Melbourne, V
    Medium Format
    Foma 200 in sheets has extended red with a sharp drop off, as does Foma 400, like Delta 400, but more longer and steeper drop off, the peak sensitivity is in red for these films.

    Foma 100 and 200 in roll film has peak long sensitivity (towards the red end) about the same as T-Max, but much sharper drop off, while T-Max has a smooth roll off into higher sensitivities.