Summary: The Nikon D5100 is an important step forward in the history of SLR cameras. Make available, in an entry-level price, features and qualities typical of more expensive models and semi-professional. Just think of the 16 mega pixel sensor and, above all, the high quality in the images it captures.
Pros: Image quality, features and specifications semiprofessional.
Cons: We would have preferred a greater customization of the buttons.
Excerpt: The Nikon D5100 is the manufacturer's latest edition to its consumer DSLR lineup. Replacing the D5000, the camera sits neatly inbetween the entry-level D3100 and the high-end D7000. The camera is clearly aimed at attracting enthusiasts who have outgrown their basic entry-level DSLRs.
Pros: Excellent image quality, Articulated LCD screen, Sophisticated AF system for the price
Cons: Odd placement of some controls, Movie mode is inconsistent, and prone to "bugs", Sluggish AF in Live View and Movie Mode
Excerpt: The new Nikon D5100 D-SLR is a compact and lightweight DX-format camera. The body is about two-thirds the size of a D300, recording on SD/SDHC/SDXC memory cards. The similarly compact kit lens, an 18-55mm VR, provides good balance, and, along with my Nikon SB-900 Speedlight, all fits neatly into a compact camera bag. The grip on the D5100 was a little smaller than what I was used to, but I soon grew accustomed to it.
Excerpt: minor fixes: 7/28/2011 update: 10/12/2012 Nikon D5100 Review The "Just Right" Model? Add a comment or send Thom feedback on this article. Update: we're more than halfway through the D5100's expected life, with a new version likely in spring 2013. With the recent appearance of the 24mp sensor in the D3200, I suspect Nikon will update the D5100 sooner rather than later, as the D3200/D5100 are basically the same body, with the D5200 getting a swivel LCD and a few additional...
Pros: Film SLR owner who hasn't gone digital. The D5100 has some nice aspects that'll make you very happy, but if you've got a lot of older lenses, you won't be happy. The manual focus ones won't meter and the old autofocus lenses won't focus. You really need to step up to the D7000., Consumer DSLR owner that's upgrading (D40, D40x, D50, D60, D70, D70s, D80, D3000). For all these folk the D5100 is a lot more. It's a bit like trading in your old CRT-based TV for a nice new L...
Cons: Film SLR owner who hasn't gone digital. The D5100 has some nice aspects that'll make you very happy, but if you've got a lot of older lenses, you won't be happy. The manual focus ones won't meter and the old autofocus lenses won't focus. You really need to step up to the D7000., Consumer DSLR owner that's upgrading (D40, D40x, D50, D60, D70, D70s, D80, D3000). For all these folk the D5100 is a lot more. It's a bit like trading in your old CRT-based TV for a nice new L...
Conclusion: Great for both enthusiasts and novices looking to take the next step forward, the Nikon D5100 offers a lot of versatility, opportunity for creativity and quality results. However, the bar appears to have been raised by the Canon 650D which has a touch-sensitive articulated screen, 18-million effective pixels and a new hybrid AF system that enables faster focusing in Live View and Video mode.
Summary: In addition to its swiveling screen, the D5100 boasts exposure bracketing and an Effects mode. The DSLR can shoot three photos -- one regular exposure, one slightly higher and one slightly lower -- just in case the regular exposure isn't quite right, then you can choose from several Effects options such as Color Sketch, Miniature, Selective Color or Night Vision.
Pros: Terrific image quality, even in low light, Compact and lightweight, Swiveling LCD screen
Cons: Sluggish autofocus in Live View and Movie mode
Summary: If you are stepping up from an older Nikon DSLR, or have film-era Nikon lenses and don’t mind focusing manually with them, the D5100 should please you. Its resolution boost over the D5000, better video capture, and articulated LCD screen make it a great imaging tool well adapted to a wide array of shooting situations.