Originally Posted by
pcsb23
May have ;)
What are you looking to use it on? Reason I ask is the macro range of lens goes from 35mm (Tokina do/did an F-Mount version) up to the spectacular Nikkor 200mm F4 Micro (old but cut yourself sharp - but bl**dy expensive too!).
Personally I'd avoid any macro lens under 60mm (except for document copying) ...
Macro lenses around the 60mm mark are very good for fish photography (in tanks), but for true macro work are a little short as their min working distance is tiny and light becomes an issue. There are two in this range worth looking at, the Nikkor 60mm AF-S f2.8 (or the AF-D version) and the Tamron 60mm F2, I really liked the Tamron 60 as it is a full stop faster and doubles as a nice portrait lens on the D7000.
Macro lenses around the 100mm mark offer the most choices. On the D7000 these are a really good choice imo and are also great for fish tank shots. The top of the line is the Nikkor 105mm f2.8 VR AF-S - not only is it a first class macro lens (and very sharp therefore) but it doubles as a useful telephoto as the AF-S is fast and the VR really helps - but very expensive imo. I prefered the older 105mm f2.8 AF-D for macro work, it just seems better to me. Sigma do a decent 105 macro, and can be good value too. Tamron offer the 90mm macro f2.8 and this lens gets rave reviews - I have used the previous version and found it to be spectacularly good - not as well made as the Nikkors, but optically very nice - and a lot cheaper too! Tamron have just updated this lens, so there may be bargains to be had on the older model (the one I used). Lastly, and by no means least, is the Tokina ATX Pro D 100mm f2.8 macro - optically it is as good, if not better, than the Nikkors, it is extremely well built too and is also very good value for money - it is the one I ended up buying.
Generally the smaller the object you want to photograph with a macro lens, the longer lens you need - most bug specialists I know use either the Sigma 180 or the rolls royce Nikkor 200mm F4! On a D7000 these longer macros are less flexible so are probably best avoided, unless you are specifically wanting to photograph bugs that is!
If I recall correctly you have a Nikon 35mm DX f1.8 and the Nikon 18-200mm VR - I'd suggest then getting a macro in the 90/100/105 range as on the D7000 it offers the greatest flexibility. All of those will work well too on FX cameras should you ever upgrade (the Tamron 60 won't, the nikkor 60 will).