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<blockquote data-quote="Sempusa" data-source="post: 713374" data-attributes="member: 44632">I just purchased a used 300 AF-S from a good source and have had it out only once so I need some more time in the field. The first thing I noticed is how noisy the AF motor is? I wouldn't call it 'squealing' -- more like knocking around. I quickly changed to a custom setting that uses center focusing on my 7100 so the lens would stop jumping around to different AF points. This helped and I was impressed by the AF speed, just too bad it made so much noise? Can you provide a link to this squealing issue, I like to see if the one I bought has to go back. I also noticed that after about two dozen shots my battery was pretty well drained - it may have not been fully charged at the start but thought I'd mention it in case that is also an issue. I have a 90 day return window but really don't like returning. So I'm planning to spend lots more time shooting- I upgraded my monopod and mounts but didn't go for the 1.4 converter yet. I researched lots before deciding on this lens over a 200-500 which I heard has sharpness issues between individual units so you have to hope for a good one even when buying new.</blockquote>

[QUOTE="Sempusa, post: 713374, member: 44632"] I just purchased a used 300 AF-S from a good source and have had it out only once so I need some more time in the field. The first thing I noticed is how noisy the AF motor is? I wouldn't call it 'squealing' -- more like knocking around. I quickly changed to a custom setting that uses center focusing on my 7100 so the lens would stop jumping around to different AF points. This helped and I was impressed by the AF speed, just too bad it made so much noise? Can you provide a link to this squealing issue, I like to see if the one I bought has to go back. I also noticed that after about two dozen shots my battery was pretty well drained - it may have not been fully charged at the start but thought I'd mention it in case that is also an issue. I have a 90 day return window but really don't like returning. So I'm planning to spend lots more time shooting- I upgraded my monopod and mounts but didn't go for the 1.4 converter yet. I researched lots before deciding on this lens over a 200-500 which I heard has sharpness issues between individual units so you have to hope for a good one even when buying new. [/QUOTE]

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