I'm looking to eventually upgrade my 1D3 body. I was thinking about going the Bridge route, but the Sigma 150-600mm C seems like an affordable route back into DSLR Birding after selling my 300 2.8.
First, Thanks for all the input everyone In my Bridge camera thread. It seems like the technology has come a long way in the 5 years I've been gone. I'm really excited to see the sigma 150-600mm. It won't be the 300 2.8 I had, but will definitely be close enough for a fraction of the cost.
Glass > Body has always been my philosophy. But once I get the 150-600mm C, I will be looking to upgrade my body. Looks like there are more options now then just simply going to the next affordable 1D.
The 1D4, was my obvious choice in upgrade, but now I'm seeing the 7D2 might be as good / better in some ways. I'm also looking at the 90D as I dont want to rule something our just because I made the leap to the 1D world and dont want to step back to prosumer products.
Here are my current thoughts on each body.
1d4 - Was always my go to next Body. Would be a step up from 1d3 in all regards.
7d2 - Seems to be more of a different level from the Original 7d than just a simple upgrade. My only concern is AF tracking accuracy, especially in servo mode for BIF. But from what I've read it should do an as good if not better job than 1d4. Only real drawback is the smaller sensor.
90d - huge bump in MP allowing for more cropping on those small backyard birds. No weather sealing (not sure I need it, I mostly only shoot on nice sunny days or from my porch, but the security of weather sealing and magnesium body would be missed. My big question is how does the AF compare in this to my current 1d3?
Thanks everyone for your thoughts and help. I've loved everything I've learned over the years from this community and am happy to be able to find the time in life to get back involved.

