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07-17-2010, 03:06 AM   #1
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Join Date: Jan 2009
Location: The Netherlands
Posts: 8

Dear all,
(I have try to search for a section on teleconverter but that was unsuccessfull. So if this faq should appear in the wrong place - can someone please set it in the right place. )
I am planning to buy a 150-500mm F5-6.3 telezoom lense and then slap on a teleconverter (X1.5 or X2.0). The question is, is it worth doing. With a F5-6.3 the light restriction is already limited, if I add on the converter that would mean I have to really slowdown the exposure time. Thus on safarie with wildfile this combination would be useless than. Is that a correct assumption?
Thank you to all for their input.

07-18-2010, 08:15 AM   #2
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Join Date: May 2010
Location: New York
Posts: 867

You are correct in that when using an F5-6.3 lens, loosing 1-2 stops of light would require you to either slow up your shutter speed or increase your ISO. In your case, you would have to bump up your ISO to maintain a shutter speed capable of capturing a moving animal. I personally think 500mm's should be sufficient for most situations while on the Safari. You should also be aware, the lose of exposure also means the view through you viewfinder gets 1-2 stops darker and you will loose auto focusing.

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08-03-2010, 01:01 AM   #3
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Join Date: Jan 2009
Location: The Netherlands
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Original Poster
thank you

Dear Chuck,

Thank you for you input and the point about loosing auto-focus was quite interesting. I don't expect the degrading effect to have such a wide ranging effect.

thank you.

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