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Another Newbie Lense Question
AimeeJ
Registered Users Posts: 17 Big grins
Sorry for the abundance of questions, but I'm just trying to get a good handle on the whole lense scene. Can someone give (or point me towards) a good explanation of lense focal length. Specifically, the aspect that I am currently confused on is as follows:
When looking at an all inclusinve list of Nikkor lenses, I see under the category of standard zoom lenses the 18-200mm. Then under the wide angle section I see 20 mm(amongst others). How is the 20 mm encompassed in the 18-200 range different from the 20 mm listed under the wide angle section? Obviously, this is just one example as there are many with similar numbers.
When looking at an all inclusinve list of Nikkor lenses, I see under the category of standard zoom lenses the 18-200mm. Then under the wide angle section I see 20 mm(amongst others). How is the 20 mm encompassed in the 18-200 range different from the 20 mm listed under the wide angle section? Obviously, this is just one example as there are many with similar numbers.
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http://www.usa.canon.com/consumer/controller?act=MultiMiscPageAct&key=Learning_Station&fcategoryid=2533
The other thing to pay attention to is the f-stop. Smaller numbers mean the lens lets in more light and allows you to use higher shutter speeds and a narrower depth of field for a given exposure.
Lastly, pay attention to image quality, some lenses will produce softer images, distorted images, less contrast etc than others. In general what you buy with more expensive lenses is better iq and often lower f-stops (lets more light in). All else equal prime lenses (lenses with only one focal length) tend to be sharper and have better iq than zooms.
Sony DSC-S85 (point and shoot)
Panasonic LX1
Olympus 770SW
In the market for a dslr