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Message: <blockquote data-quote="FlyingFlanders" data-source="post: 385471" data-attributes="member: 34753">Ok here's a thought, I have the D7100 and the older 80-200 push-pull on the right.... Love it, love, and love it even more when you realise that any of these lenses will give you an effective 1.5x the stated focal length due to the magnification of the sensor because it's DX and these lenses were not. So that means one of these on the D5200 at 200mm is effectively 300mm!And here's the best part... They maintain their max aperture of 2.8 throughout....(Can you hear the penny dropping?)That means for a fraction of the cost you now have a 300mm 2.8 zoom on a 24.1mp DX body, that's still plenty of resolution!Personally I can't fault the D7100 with which my older lenses like this one all work perfectly, maybe you should think about a second user D7100 and put the extra cash towards the lense with the tripod collar, much better balanced on the tripod for long exposures.Also the push-pull collars can tend to slip a little when pointed up or down if they're been 'run in nicely', this would NOT be good for Astro...Hope that helpsSent from my iPad using TapatalkSorry, missed that you already have the D5200, still, might be a good idea to consider paying a little xtra for the lenses with the tripod collars though.</blockquote>