I played with a friends 70-300mm and plan on getting that one for sports shots (my sons tee-ball) and things I want a little bit closer. I am also looking for a good portrail lens. I have been told that the 50mm f/1.4 is good. Also the 18-200mm. Can you please tell me which portrait lens I should get?
Comments
In addition to the maximum aperture, you also want the focal length to fall between an effective length of 50mm to 150mm. Any wider and you'll end up with large noses/chins/foreheads. Any longer and faces will start to look "flat".
The 50mm f/1.4 (see here) is a fantastic portrait lens. It has an optimal maximum aperture and falls inside the ideal focal length range for portraits. It's super sharp and will give you that buttery smooth background that really makes your subjects "pop".
The 18-200mm isn't an ideal portrait lens. While it does fall into the ideal focal length range for portraits, it has a less than ideal maximum aperture range between f/3.5 to f/5.6. This means the lowest f-number you can use at wide-angle (18mm) is f/3.5 and f/5.6 at telephoto (200mm).
If you have the budget, the 50mm f/1.4 would be an excellent choice. Happy shooting! :)