Originally posted by beholder3 Well, that is just the analogue way of swapping out a background, similar to the hand paintings which were used a long time in cinema movies for "castles" and "spaceships" in the background.
It's no different from doing it in photoshop afterwards. It just has the added benefit of the light and light reflexions on the subject already being they way you want them.
It is "fake" bokeh this way or the other though.
When you use a long lens or do macro shots, your depth of field is extremely narrow by definition. This the DA 55-300 mm at f6.7.
This is the same lens at f8.
Obviously you can have special backdrops and that can add some contrast or color to your photo, but it certainly isn't necessary. I put out hummingbird feeders every year -- not so much to photograph them, but simply because I enjoy watching them and how they fight with each other. Hummingbirds are truly amazing creatures.