MrT Loc: Gilbert, AZ

I have Tamron 150-600 f5-6.3 and 70-200 f2.8 both G2 and the tapin console. I got it for the 150-600 but did not need it. I did need it for the 70-200. It makes a big difference. The software installed on my win 10 computer with no issues and no issues with the lens. You can also update the firmware with it. So far there has only been one firmware update for each lens. I like having the console. It was $60 so not that expensive.

SuperflyTNT Loc: Manassas VA

Are you also somewhat put off by the idea that Nikon includes a fine tune option on it's menu? Same idea. Cameras are built to certain tolerances, as are lenses. I the cameras tolerance is at one end of it's spectrum and the lens is at he other end of it's spectrum, the focus might be less than perfect, (even with a Nikon lens). The fine tune adjustment allows you to bring those tolerances more into line. Many people with either Nikon or Tamron, (or Sigma), lenses find there is no need to fine tune their lens. Now maybe the chance that you need tuning is better with a third party lens, because they're designing lenses that will work on multiple manufacturer's bodies. There is a real advantage to using the Tap-In to tune the lens itself instead of using the in-camera tuning. With the Nikon tuning you need to determine the adjustment value at multiple focal lengths and focusing distances and average those values, (possibly weighted as to how you most often use that lens), to enter the one adjustment value to enter in to the camera, so it's one adjustment to best fit, but maybe not perfect for all. With the Tap-In you determine those values and create a matrix of values for each focal length and subject distance. You can also save that matrix as a file so that you can tune the lens for multiple different bodies. Maybe I use my 18-400 on my D500 most of the time, so I have that matrix loaded, but today I'm gonna take my 150-600 and I want that on my D500. I can then hook up the Tap-In and load the matrix for my D7200 and use the 18-400 on that body.

Hamltnblue Loc: Springfield PA

A 400 DX lens is equivalent to a 600 on the D7000.

imagemeister Loc: mid east Florida

You need to at least TEST it. IF adjustment is needed, I think you can do it with your camera body at the long end. Since it is a 6.3 lens, it may be somewhat difficult to adjust due to the large DOF. Ultimately, if done properly, your best result will come with the tap-in console.
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planepics Loc: St. Louis burbs, but originally Chicago burbs

I bought a 150-600 (mostly) for shooting at air shows. It came in a package with software, monopod and other goodies, including a focus target (which I had never used). After experimenting, I found a slight micro-adjustment on my camera was in order, also something new for me. The results were night and day. I found that at an airshow, a tripod just gets in the way and that handholding wasn't as bad as I thought it would be. If I was doing landscapes I'd use one for sure. Eventually I'm going to take my other lenses and see if adjustments are necessary (although I've always gotten superb shots with my macro lens).

amfoto1 Loc: San Jose, Calif. USA

Every lens and every DSLR has to be calibrated to focus properly. This can only be done separately with so much precision. It's pretty darned good, but being able to further fine tune it yourself might make for better results.

If your D7000 has built-in Focus Adjustment, you very likely wouldn't need the Tap-In module. You can make focus adjustments with the camera's focus system, rather than the lens'. However, there may be other things you can adjust with the module, such as focus speed, image stabilization, etc. You won't be able to tweak those with the camera's feature... only focus accuracy can be set with it.

If the combination of your particular D7000 and the particular 100-400mm lens you buy happen to be out of calibration with each other more than the camera's focus can correct, you might still need the module to be able to make adjustments both ways. However, that's VERY unlikely.

The Tamron 100-400mm seems a very nice lens. If I were buying one, I'd also get the optional tripod mounting ring. I use a Canon 100-400mm and often put it on a tripod or a monopod (it is a little larger and slightly heavier than the Tamron, because the Canon lens has 1/3 stop to 2/3 stop larger aperture at various focal lengths). The Tamron's tripod ring is neat, because they had the foresight to design an Arca-Swiss compatible dovetail right into it, so you don't need to buy a separate lens plate, if you happen to use that quick release system (I wish Canon would do the same!)

Ronin207 Loc: Southern coast of Maine

You start getting north of 300mm. Start thinking tripod. Then again, I have missed a lot of shots messing around with mine. It ended up in the closet. I stopped at 300mm And invested in camo to get closer. Now I stock for my shots. Also, you start getting up there for the long shots. Atmospheric disturbance and heat waves unless it’s early morning.

SuperflyTNT Loc: Manassas VA

As I said in my other post, the big advantage to using the Tap-In to tune is it gives you the he ability to tune for multiple focal lengths and distances