Lightnings taking a ride

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Optical devices used between camera and lens to magnify middle part of projected image, effectively turning the lens into a longer (but slower) one.

learn more… | top users | synonyms (1)

18
votes
4answers
5k views

How does a teleconverter affect depth of field?

I'm aware that a teleconverter will reduce the amount of light reaching the film or sensor in a camera, and as such you hear people banding around things like "With a 2x teleconverter this 300mm f/2.8 ...
7
votes
2answers
859 views

Why can only certain Canon lenses be fitted with an extender?

Is there a reason only certain lenses can be fitted with an extender? I'd really love to be able to fit the extender to some of my cheaper lenses.
8
votes
2answers
344 views

Are there any downsides in using 2x extenders?

What are the negatives with using teleconverters?
14
votes
3answers
5k views

What is the difference between teleconverters and extension tubes?

I'm aware of two devices that can extend the reach of a lens: the teleconverter and the extension tubes. What else would they have in common, and where do they differ? Are there situations where one ...
10
votes
8answers
3k views

For greater telephoto range, should I use 70-200mm + teleconverter or a longer zoom lens?

Right now, I have a Nikon 18-200mm f/3.5-f/5.6 VR lens. I like it, but want more telephoto range and would also like to be able to use faster shutter speeds. I am interested in the 70-200mm f/2.8, but ...