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Nikon DSLR Cameras
D3100
Lens Manufactures
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<blockquote data-quote="Marcel" data-source="post: 173882" data-attributes="member: 3903"><p>Polaroid, vivitar, Rokinon, many of these may have different names but are manufactured by the same company and are the same lenses. Just different distributors.</p><p>The main reason these lenses are much less expensive is that they don't have auto-focus. To be able to built a servo-motor coupled with camera's auto-focus software and sensor costs money so this is where these companies save. </p><p></p><p>I have a Rokinon 85mm 1.4 and it is a great sharp lens. Paid around 500$ including import taxes so it's still 1,000$ less than the Nikkor. But, for it to be used successfully, I had to buy replacement focusing screens on my D700 and 7000. The DOF is so thin at 1.4.</p></blockquote><p></p>
[QUOTE="Marcel, post: 173882, member: 3903"] Polaroid, vivitar, Rokinon, many of these may have different names but are manufactured by the same company and are the same lenses. Just different distributors. The main reason these lenses are much less expensive is that they don't have auto-focus. To be able to built a servo-motor coupled with camera's auto-focus software and sensor costs money so this is where these companies save. I have a Rokinon 85mm 1.4 and it is a great sharp lens. Paid around 500$ including import taxes so it's still 1,000$ less than the Nikkor. But, for it to be used successfully, I had to buy replacement focusing screens on my D700 and 7000. The DOF is so thin at 1.4. [/QUOTE]
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