The 100-300 is known to be soft near 300mm wide open and needs to be stopped down whereas the prime should be sharper even wide open.
kel77, RyanKhoo,
For this Pana 100~300mm zoom lens, can I set the Aperture Priority to F4.0 if I zoom it out to the max 300mm?
Or the lens or camera will reset the Aperture to a smaller opening depending the lighting condition to suit the 300mm focal length like those common bridge cameras?
Please pardon my ignorance as I do not have this lens. Try to google, can't find the answer.
Thank You
EisMann