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Thread: Film Development Testing Question

  1. #21

    Join Date
    Mar 2017
    Posts
    319

    Re: Film Development Testing Question

    Yeah, I tried to clean it off. Unfortunately, it's internal. You really have to hold the lens at the right angle to see it, and even then it's not very apparent. It's a 135mm Fujinon W that I got very cheaply, specifically because of this minor haze.

    And, yes again on the fungus. It's some fine threads on both lens cells, but looks completely covered by f/11, so should not be a problem. But I may not be looking through it the way I ought to, so would like to see empirical evidence.

  2. #22

    Join Date
    Feb 2015
    Location
    Sheridan, Colorado
    Posts
    2,434

    Re: Film Development Testing Question

    As long as you have a good lens, you are all set. Pick a film and determine your exposure and development as you like. The expose the lenses under study exactly the same, but using a selection of f-stops. You should be able to determine problems in the exposure or the resolution without even making prints -- just use a loupe or a reversed enlarging lens.

  3. #23

    Join Date
    Feb 2015
    Location
    Sheridan, Colorado
    Posts
    2,434

    Re: Film Development Testing Question

    Quote Originally Posted by Greg Davis View Post
    Are the holes round? Square holes do get hung up on the light trap but round holes fare a little better.
    My holes are round. I made the with one of those "door knob" drill set from the hardware store. I've filed them down to be smooth, but the felt in the holder points downward and catches. No big deal -- it's a scrap film holder.

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