Depending on the filter factor of the UV filter and also the coating of the lens, generally it does makes a difference n improves contrast, subject to sun's direction.
and among those you listed, this the ONLY one I can SEE the difference, barred the magnifying glass or loupe....
For example 2700dpi? 4000dpi? negligible difference, i prefer to see the pictures with my naked eye. 8000dpi? yes, can see.
:gbounce: