I am going to be getting a Nikon D7000 soon. I think I'm correct in assuming that the Nikon D7000 will use its own focus motor for an AF lens, but allow the lens to use its motor for an AF-S lens. I'm looking at 50mm prime lenses that are AF and AF-S. From what I understand, AF-S lenses are a bit faster, and possibly more accurate (are they?) but is it worth the extra bump in money (~$85) to go with the the AF-S vs. the AF? How does this question change at other lengths (35mm, 80mm etc.)? Is the answer the same across the board? (If the AF-S simply performs better, I think it's worth the money.)
Does it make sense to go with AF-S lenses now just in case I move to a Nikon DSLR that doesn't have an internal motor?
Answer
Yes, yes, no, maybe, no, probably, no
- You will have AF focus for both AF and AF-S lenses.
- AF-S are said to be faster, by how much depends on the lens.
- They are not more accurate.
- They may worth it, that depends on your budget and your subject's movements.
- Probably these differences are the same based on focal-length.
- A movement from a high-end DSLR to a low-end one is unlikely, unless you want a backup body and cannot afford two high-end ones. It may drive you crazy though!
PS: We recommend one question at a time.
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