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<blockquote data-quote="salukfan111" data-source="post: 500397" data-attributes="member: 39212">I'm interested in how this turns out for you. I did something similar to take pictures of Osprey 700 or 800 yards away and it just didn't turn out well. [ATTACH]183431[/ATTACH]&nbsp;From a practical standpoint, something like a crop sensor camera, 400mm f/3.5 lens with a pair of tc300s stacked in series is probably what you are looking for.&nbsp; You could probably even find a used 600 mm you could put a teleconverter or two on.&nbsp; You could get a 300mm f/4.5 and a tc200 which is a great combo (I've recently purchased a tc 16a to make this lens auto focus).<a href="http://www.ebay.com/itm/Nikon-Nikkor-ED-600mm-F-5-6-AI-S-AIS-Lens-EX-/121743263869?hash=item1c5876c87d:g:NlcAAOSwMmBV3x-U" target="_blank">NikonÂ*nikkor Ed 600mm F 5 6 AI s AIS Lens EX | eBay</a>This thing with a tc1.6x (auto focusing) would give you 1440mm f/~8 (including the crop factor).</blockquote>

[QUOTE="salukfan111, post: 500397, member: 39212"] I'm interested in how this turns out for you. I did something similar to take pictures of Osprey 700 or 800 yards away and it just didn't turn out well. [ATTACH=CONFIG]183431._xfImport[/ATTACH] From a practical standpoint, something like a crop sensor camera, 400mm f/3.5 lens with a pair of tc300s stacked in series is probably what you are looking for. You could probably even find a used 600 mm you could put a teleconverter or two on. You could get a 300mm f/4.5 and a tc200 which is a great combo (I've recently purchased a tc 16a to make this lens auto focus). [URL="http://www.ebay.com/itm/Nikon-Nikkor-ED-600mm-F-5-6-AI-S-AIS-Lens-EX-/121743263869?hash=item1c5876c87d:g:NlcAAOSwMmBV3x-U"]NikonÂ*nikkor Ed 600mm F 5 6 AI s AIS Lens EX | eBay[/URL] This thing with a tc1.6x (auto focusing) would give you 1440mm f/~8 (including the crop factor). [/QUOTE]

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