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Author Topic: Teleconverters for Digital SLR  (Read 2371 times)
Prismpic
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« on: February 24, 2006, 04:17:55 PM »
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I am currently taking photography classes, and have a LONG way to go! I own a DSLR and am in the process of forming my kit. At this time I'm looking at lenses. My manual says my camera will take most CPU lenses (Particularly D and G).

My question is the following. There is an X mount lens, that claims will fit my camera as well, except it will only work on Manual which is no big deal to me. Does that mean I NEED A TELECONVERTER? It doesn't say

And just how DO teleconverters work???
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sposch
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« Reply #1 on: February 24, 2006, 05:58:03 PM »
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If the lens is designed to fit your camera's lens mount no adapter/converter  will be required.

Teleconverters are designed to extend the focal tength of a lens when mounted between the camera body and the lens. For example a 1.4X converter will turn a 100mm lens into a 140mm lens and a 2X converter will stretch a 100mm lens to 200mm.
This extra length comes with a loss of light though, a 100mm F2.8 lens becomes a 200mm F5.6...nothing for free here.

There are also Adapters available to mount lenses to cameras with different lens mounts  so you can for example mount a Nikon lens on a Canon body with the right adapter, most auto features are lost though.

I just changed over to a DSLR and auto focus lenses. I used to think auto focus was just fancy schmancy stuff I didn't need but the Auto Focus and Image Stabalized lens's I have now are amazing. I have gotten lots of excellent shots I would have missed with my old slow manual focus film burner. Unless you only ever plan to take pictures of rocks and trees I highly recommend spending the extra for the auto lenses.

Enjoy your new hobby. Steve P.
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Tapeman
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« Reply #2 on: March 05, 2006, 06:54:12 PM »
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You will also lose some image quality. It varies between brands and lenses. Usually 1.4x converters will perform beter than 2x in terms of image quality.
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Tapeman.  Canon shooter. Acquiring gear for 25 years.
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