Originally posted by mee It's the G1 optical formula, apparently. So it has gotten a lot of flak, esp by Nikon users, but I'm really interested in it.
Well, I'm using three Pentax rebranded Tamron lenses, and they are pretty good, especially the 70-210. Actually, my 70-210 f/4 has a
major advantage over my 70-200 f/2.8. For stitching images the Pentax 70-200 has a nodal point (to avoid parallax errors) moving from the back of the lens up to the front when zooming-in/out, my 200mm rail isn't long enough... The 70-210 is easy the nodal point doesn't move when zooming in/out, so I don't even need a rail. The recent Tamron (or Sigma) lens designs are very good, comparable to OEM, it's not like 20 years ago. Now you can get the Z 28-75 f/2.8 and use the Tam. 70-210 f4 with an adapter. If the 70-180 is also made available for the Z mount, even better. For me, the only thing that Nikon's lacking right now is a Z 70-200 f4 lens. Light weight kit: Z7II, Z 20 1.8, Z 24-70 f/4, Z 70-200 f/4 , 20mm to 200mm capability, DONE.