<a href=showthread.php?s=&postid=14874854#post14874854 target=_blank>Originally posted</a> by beerguy
Not new, as far as I know, but B&H, KEH and Adorama all sell used gear and have a return policy if something isn't what you expected; an improvement over eBay.
<a href=showthread.php?s=&postid=14876795#post14876795 target=_blank>Originally posted</a> by Jacob D
Isn't there another nice 3rd party macro, maybe Tamron? Beerguy probably knows... I've only ever used the Canon 100mm macro.
<a href=showthread.php?s=&postid=14877359#post14877359 target=_blank>Originally posted</a> by jkeating2005
if i am not mistaken, i believe you are talking about the Tamaron 90mm macro?
<a href=showthread.php?s=&postid=14874920#post14874920 target=_blank>Originally posted</a> by juniormc8704
Ive found the VR to be very nice when shooting top downs.
<a href=showthread.php?s=&postid=14870867#post14870867 target=_blank>Originally posted</a> by beerguy
Both lenses are sharp. Both lenses work fine for shots other than macro work. What you need to realize, however, is that neither is a zoom lens.
The only real drawback to the Sigma is that it's "external focusing." That means that the lens barrel extends while focusing. Normally that's not an issue but when you're up against the front of your tank it can be a hassle.
You might also want to look at the non-VR version of the Nikon. VR is of very little use for macro work and you can save a ton of money.