I've had the Sigma 150-500mm OS for a few years now and am currently using it on a Nikon D7100 body. I've managed to get good images with it but find that it is a hit or miss. I'm wondering if the new Contemporary lens is worth the upgrade? I'd love to buy the Nikon 200-500mm but it's just out of my price range. For those who have gone to the 150-600mm C from the 150-500mm OS, is there a remarkable improvement that's worth the additional cost? The extra reach would be nice but I'm mainly looking for something that is sharper on the long end and that is quicker to focus.
Ria1, I haven't used the 150-500 so I can't contrast directly. But I will say that the 150-600C is very fast in focusing and I don't think you will be disappointed in that regard at all. In regards to hit or miss, I found it to be pretty consistent from shot to shot.
One thing I would say is that the copy-to-copy variability between a given lens is quite large (and this goes for the Nikon 200-500 also -reference photography life's review where they had to go through 3 copies to find a sharp one). So there is a "hit or miss" to consider in regards to whether you get a very sharp, sharp, or unsharp copy of new lens.
So in terms of risk vs. reward I would say:
1) Focus speed: little or no risk IMO, but I would defer to someone who has owened both lenses.
2) Image quality due to variability of the new lens: high risk IMO
3) Image quality of a good copy of new lens vs. the 150-500: I can't say as I have not used both. I would say find someone who has owned both lenses and/or reviews and/or sites like pixel peeper which allow you to look at full resolution real world pics. Fred Miranda threads often have high Resolution photos. Mansod on DPreview has some great Sigma C photos if you want to search for his postings. The more full resolution pics you see the better IMO in terms of seeing if there is a real world difference in Image quality.
Some other items you may want to factor in:
a) a refurb 200-500 Nikon can be had for $1049 right now from a third party dealer.
b) cyber monday is around the corner and last year had the Sigma 150-600C for $700 new with USA warranty.
c) Sigma 150-600 Sports is available form time to time for $1200-1300 used.
Thanks, Mike
P.S. I just saw that you are using the d7100. For me the d7100 underperformed in terms of autofocus (accuracy, not speed, both are very fast focusing) on both the C and S versions of the Sigma 150-600. So D7100 aut0focus performance may be a limiting factor also. Renting the C version would answer all your questions in one day and elimainate many of the risks (except copy-to-copy variability -unless you end up buying the copy that you rented).
Also I forgot to mention that the dock allows you to fine tune the focus of the C or S versions at 4 different focal lengths x 4 different distances = 16 points. Also the custom lens switch modes of the C and S are very helpful IMO and would be an upgrade over the 150-500. you can customize autofocus behavior, af behavior, and focus limits. You can even customize how much of a turn is required before the manual focus dial overides the AF.