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Results tagged with zoom
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user 67
An optical 'zoom' or 'variable focal length' lens is one that has a range of focal lengths at which it can operate. "Digital zoom" is a technology which simulates optical zoom by cropping the image.
12
votes
Accepted
Overlapping vs. Complementary lenses
With zoom lenses, the extreme focal lengths on either end are often weaker optically then the center of the range, so with a 18-55mm and a 55-250mm you have covered the 18-250mm range, but you will probably …
- 23.7k
0
votes
Which lenses are best for macro and for birdwatching (both Canon and Nikon)?
Looks like the Canon 100-400 is a great choice for bird watching.
For macro, I'd also consider the 100mm Macro lenses (USM or L Series), esp. if you go with a cropped sensor. If you don't need the e …
- 23.7k
6
votes
Accepted
Can't auto-focus at full zoom
If you are unable to focus on any subject at any distance when fully zoomed, then it could certainly be a hardware issue.
It is more likely, however, that the autofocus is simply not able to find a c …
- 23.7k
10
votes
Accepted
Canon kit with standard EF-S 18-55mm IS or 18-135mm IS?
Beyond the longer focal range, the 18-135 also features internal focusing, so filters don't rotate during auto-focus, which is very nice if you ever use a circular polarizer or graduated ND filter.
T …
- 23.7k