I have recently gotten a new lens, an Olympus 12-200mm (24-400 in SLR terms). It overlaps the 100-300 long lens I have. Although I have always known that each lens and each optical design has its own characteristics, this is the first time I’ve so clearly seen the difference. Both lenses can clearly focus on the birds and on the 12-200 lens, the sweet spot is perfect for the location of the birds on the feeder. But there’s a huge visible difference between the two lenses both in the way they capture the birds and in how bright and sharp the background is compared to the birds.
If you look, I bet you can tell which pictures were taken with which lens. I like the results from both lenses, but I have to make decisions on what “look” I want the pictures to have when I am taking them.