The general purpose zoom
This is the lens that sits on my camera the most. For APS-C cameras, something in the 18-50mm range is best… for 35mm format cameras, a 24-70mm will work. This will give you the ability to go fairly wide while also being able to zoom into objects off in the distance. This lens might be your kit lens, but it should preferably be fairly fast (a fixed f/2.8 if possible) to give you greater control over depth of field. It makes a great “walkabout” lens when you aren’t sure what you will be shooting.
The macro lens
The length of this lens isn’t as important as its ability to create a 1:1 magnification of subjects. I currently keep a 50mm f/2.8 macro in my bag because it is small and light… easy to carry around for when I might need it. It makes a decent portrait lens (very sharp and the f/2.8 provides a fairly shallow area of focus) and the level of detail you can get when shooting objects up close is fantastic. Having a macro lens opens up a whole new world of tiny objects to photograph. Also, if you do any type of product photography (jewelry, food, etc.) this lens will allow you to capture a much greater level of detail than is possible with non-macro lenses.
The telephoto zoom
The telephoto zoom should be in the general range of 70-200mm with a maximum aperture of at least f/4 (faster is nice though). This will give you a lot of distance to work with and a very shallow depth of field to bring focus to your subjects. For faster moving objects, the bigger aperture will allow you to shoot at faster shutter speeds which will help capture moving objects (birds, sports) too. This is also an excellent portrait lens as the focal length minimizes distortion and narrows the angle of view to fill the frame with your subject.

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