Most integrated WRATTEN daylight filters of the old Super8 cameras are made from coloured gelatin with a clear coating. Unfortunately this gelatin is organic and a very good livingarea for fungus or bacteria cultures - also possible in humid air: the clear coating and gelatin filtermaterial disconnects and optical clearance is lost...Due to age of the Super8 cameras, very often I find dots or a dim surface on this integrated orange filters which are not cleanable.
This is the reason why you can shoot with a camera clear sharp pictures without this filter and only dull - dimmed pictures with filter......
How I can avoid this problem?
- Ask your local repairman to replace this by a new one - but be aware: mostly your camera must be demounted !
- Use a filterbox in front of your lens! With this you will be free to insert also any other filter you need!
Have no fear! New filters are good for a lot of years if stored well.