Quote:
Originally Posted by equality72521
What are the pros and cons of using a tele? Lets say I use a 2x tele with my 55-200mm to get an effective 110-400mm. I think I'm correct in saying a true 400mm would be better but how much difference does it really make? I can find a used tele in the $300-350 range while I arrange to sell my soul for a real 400mm (or greater) lens. Thoughts?
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Yes, the fixed focal-length lens would be better both in speed and image quality. In some cases/configurations (with digital), you can actually get the same or better results by simply up-sizing the image! There may be other issues with a TC as well, such as auto-focus compatibility, etc. Also, remember that when using one, you decrease the widest aperture of the lens. So if you put a 2x TC on a 200m f4, it will become a 400m f8 lens.