Originally posted by csa Well, I didn't give up; rather I just bought a mint Sigma 105 EX-DG macro right here on Marketplace.
Well, the horse has left the barn, but perhaps these few thoughts might help someone else who comes along later.
Some responses have been very black and white in terms of whether or not autofocus is useful in macro. Yes, if you're doing 'true' macro, autofocus is probably not worth using. But many people
are going to use their macro lens for 'closeup' work, or even normal shooting. If you like using auto-focus for non-macro shooting, then it makes sense to get an auto-focus macro lens so it can
do double duty. How many people are going to invest in a high quality lens and then use it exclusively for one type of shooting?
If you ARE getting an autofocus lens, then getting one of the Pentax lenses has one advantage that hasn't been mentioned - quick shift. Again, it may not be important for true-macro, but for closeup
work, if you're using auto focus for a mobile subject, it's handy to be able to just reach out and tweak your focus ring without having to switch from auto to manual focus on your camera body. And if you
take advantage of quick shift on your other pentax lenses, it can become a habit that's hard to break when you have your non-pentax autofocus lens mounted ( which I'm finding with my Tamron 17-50 ).
I've got the DFA100 WR and I like having quick shift. ( I'm considering making it a rule to NOT buy any autofocus lens that doesn't have Quick Shift. )
Several people have recommended the older F4 macro lenses. I used an M series 100mm F4 extensively for many years, and yes, it's an excellent lens and an inexpensive way to get your feet wet.
But if your eyesight isn't great, then I would recommend trying to get a macro lens with F2.8 maximum aperture. This will give you a brighter view in your viewfinder, which is very helpful for macro work, especially
if your eyesight isn't as good as it used to be ( which is the case for me as well ).
It might have been tough to find a used DFA 100 macro lens within your budget. I don't know if the FA 100 has quick shift or not. The Tamron would probably have been a decent lower cost option -
a highly regarded lens, F2.8 but without the quick shift.
Not familiar with the lens you picked but it looks to be a good solid choice. Make the most of it!