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Old Jan 31, 2007, 8:37 PM   #1
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Does the length of the AF Adapter vary during focusing?



I am considering getting one to use with a heavy lens and where both the camera and the lens will be supported. I cant do this if the length of the adapter changes.



Thanks
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Old Jan 31, 2007, 9:01 PM   #2
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John Hill wrote:
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Does the length of the AF Adapter vary during focusing?



I am considering getting one to use with a heavy lens and where both the camera and the lens will be supported. I cant do this if the length of the adapter changes.



Thanks
Length does not change, the element moves to focus within the adapter. The length and outward dimensions do not vary
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Old Jan 31, 2007, 9:04 PM   #3
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the determining factor is if your lens changes length.. most of my older lenses do. you would need a lens with IF.
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Old Jan 31, 2007, 9:09 PM   #4
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Thanks,

I will be choosing a lens with the focus ring in front of its tripod mount, forward of that it can move and not upset my plans.

I though the idea of the AF adapter was that I could set the main lens focus on infinity and focus using the AF adapter? Have I got it wrong again, it would be unusual for me to find out before I spent the money!:roll:


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Old Jan 31, 2007, 11:44 PM   #5
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The AF 1.7 focuses inside the TC so there is not enough room for full focus with most lenses, so you will have to set the lens to the end you are interested in, close or far and that half will AF.

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Old Feb 1, 2007, 12:05 AM   #6
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Thanks Tom, thats clear now.
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