Very nice accessory for a relatively fast lens (2.8 or less). Somewhat expensive, but excellent optical clarity. A great way to nearly double your reach with only a small penality in light loss.

The converter is very easy to use, and with Nikon's modern lenses it enables all functions; Optics are excellent, and very little is lost in sharpness; The 1.7 is a very nice middle ground between the 1.4 and the 2.0.

The converter is expensive; and a little inconvenient if you are in a hurry

I would rate the 1.4TC as the only TC that will yield excellent results across the board. The 1.7 is a good compromise, but dont expect it to yield tack-sharp results on every lens. You need to stop many lenses down at least two stops when using this TC to achieve max sharpness.

Good reach; works flawlessly with top-quality glass

Not as sharp as 1.4TC

I would rate the 1.4TC as the only TC that will yield excellent results across the board. The 1.7 is a good compromise, but dont expect it to yield tack-sharp results on every lens. You need to stop many lenses down at least two stops when using this TC to achieve max sharpness.

Good reach; works flawlessly with top-quality glass

Not as sharp as 1.4TC

It was hard enough justify $1600 on a 70-200 2.8 VR lens, spending $5500 for a 200-400 F4 VR was out of the question. Still there are times when 200 isn't quite enough reach to get the picture you want. The $420 for a TC-17E was a compromise that I could live with.

Extends focal length of certain Nikon lens by a factor of 1.7 at a cost of 1.5 F stops; Makes a 70-200 2.8 a 120-340 4.8.

Works with a limited number of Nikon's catalog of lens

Coupled with fast primes this TC really shines. Outstanding IQ/AF speed with my 200 f2/300 f2.8 VR's This little addition has actually saved me thousands of dollars not having to purchase a 500...love when that happens!

One of the true perks of shootin' Nikon

None

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[...] functoned as it should have. No complaints.

Durable; Fast / accurate auto-focus; Lightweight; Rugged

"I've been using my D7000 for over a year now, and it's going on strong. No issues with the build quality at all. The Battery life is very very good (usually avg around 1500 shots or more with lots of reviewing). The twin card slots are a definite plus! Coupled with a fast card (eg.

I have not tried the new 2x but I've heard the 1.7 was the best overall lens and I can say it works perfect for me. no distortion, f stop is still fine for any thing outdoors or well lit indoors.

make sure you check nikon web site to see if it work with your lens.

made my 300mm f2.7 to 520 mm

price will not work with all lense