john_name_taken

I was thinking more about the shooting experience, AF speed, keep rate compare to without the 2x, etc. Thanks.

I noticed that you have the 100-400 in your gear list. I'm very interested in your a9+100-400+2x experience. I'm curious if the 100-400 can be a viable lightweight option. Thanks.

On a 600 f/4 ... just saying. :-D

Shame on you! Do you know how many times I got bashed HARD when I mentioned a9 and APSC in the same sentence in the Sony forums? It’s a big can of worms, and people are very passionate (almost ...

The a9 + 200-600 weigh 6 lbs. I don’t think the harness can hold them, and even if it can, they won’t balance well. The center of the gravity is somewhere along the lens collar, not the camera.

IMO, the "sacrifices" are relative. From OP's gear list, he's coming from the a6x00, so he's probably okay with all the things you listed. Me, if I can get the pictures I want, they are ...

Both? That makes me think it might be on the camera side. Firmware up-to-date? Here is the video on cleaning contacts if you're still interested. https://youtu.be/raTT9c5uumM

At the very bottom of OP's post, he needs to make the decision by Monday :-D

Just a guess: maybe the lens and/or camera contact points need to be cleaned?

I have a6600 and 70-350, and it's what I take when the weight matters. The only thing kind of not so great is that the 525 is the hard long reach (excluding digital & post crop). https://youtu.be/m ...

I prefer dawn and dusk for the lighting, and 2-stop is a lot. I used 2xTE @ f/8, and image sharpness was noticeable less even in good light. Not sure how useful it is @ f/11. I don't think you need ...

I set mine (not a7c) to a different focus area type. I usually have Zone for half press (BIF), but when the background or foreground are busy, I use "AF-ON" (which is set to Center or Flexible ...

What you really want is the a1, which you excluded. It gives you usable 600 and 1.4x 840 @ 20.6MP in APSC. Someone mentioned that pairing up an a1 with 70-350 will give you a very capable and light ...

Regarding the Youtube, people make money from the amount of traffic, and I'd seen plenty of clickbaits, even from "cognizant" people.

You kind of answered your question. You can't get this with a7c, period. [EDIT] you could get ND filters to get around the SS. Unless sports/BIF is high on your priority, I believe a7iii's is good ...

The OP will be happy with R4 over XT3, and unless a7iv or R5 use stack sensors, most likely, they probably won't be as fast as a9 (w/o the 1.4x), but take it as grain of salt. I use 200-600, and ...

They are trolling you. Yet, you said you could be a pro ... are you trolling us?

A friend of mine took his a7c to an air show, and he paired the camera with 100-400GM and 600GM. I’d seen him taking BIF with a7c+600+1.4 x :-D a7c AF is much better than a7iii.

Search for “Sony 70-300 tripod collar” either eBay or Amazon. Don’t know how good they are, but free return on Amazon.

+1 Also, nowadays, with firmware updates, you can’t easily judge how good a camera is based on the release date.