Lovely images - looks like catfish noodlin' country to me.

There has been a rep from B&H who monitors what gets posted here as it pertains to B&H customer service and relations. His name is Hershel. Send him a private message and I'm convinced you'll see some results.

Back in the days of film, prior to digital, Canon produced a "battery pack" akin to a hard case "fanny pack" that your belt slipped through and it held 4 "D" cell batteries wired so they were equal to one of the batteries that cost $15 and lasted for about 3 rolls of 36 exposure film, or less in cold weather, in a Canon A2E which was my last film camera. I could shoot for weeks with a set of batteries and eventually bought 3 sets of rechargeable batteries and saved a wad of money and, among other obvious conveniences, I could shoot a long timed shot like a "time lapse" without fear of my battery draining before I was ready for it to be over. That experience inspired me to seek out a way to eliminate the necessity to be constantly replacing dead batteries in my Sony a6500s, which I bought to be able to benefit from the IBIS with some non-IS lenses, with the undersized battery that you can drain just looking to change a menu setting you need to change while shooting when you're not used to the menu yet. There was absolutely no way I was going to live with the problem nor should anyone else.

You can get dummy batteries for about any make and model camera on ebay and with the universal connector the battery then can be transferred from one camera to others.

In an earlier comment you mentioned pickin' my brain for places to go next time you come to Colorado - ma'am, you're doing just fine without any help. From what I've seen, I cannot help but wholeheartedly commend you on your results.

Something like this. I have multiple Canon and Sony cameras and have made a dummy battery harness for each of them and have six batteries I keep charged. One of these will last longer then several OEM or aftermarket replacement batteries and you can extend the charge on these batteries by sticking them in your waist band next to your body to keep them warm. Here in Colorado when up shooting in the mountains in sub-zero weather that can really make a difference and certainly can make a difference wherever a person is when it's cold. https://www.uglyhedgehog.com/t-703134-1.html

Here's my answer to your issue: https://www.uglyhedgehog.com/t-703134-1.html

Uh, let's see... Al (what's his name... uh)

Good set. They're getting so thick here in CO that sometimes you have to run 'em off just to get a good clear landscape, after you've shot them, of course. "Fish and Game" released a few breeding pairs in north central Colorado around Walden back in the early '90s and the count is now up around 2,500 and spreading throughout the state as well as up into Wyoming, especially around The Snowy Range, about 30 miles southwest of Laramie. We're even getting some walking around in the Denver suburbs.

I don't want to burst everyone's bubble about Paypal but I've had my account breeched twice due to the automatic sign in. Twice now, somehow, someone managed to spoof my login and made some purchases. Paypal urges you to use the auto login for some reason that isn't clear to me, while at the same time most entities dealing with money are doubling up on their secure login processes. I have turned off the autologin twice now and Paypal keeps turning it back on without my approval. I had a hard time convincing Paypal that it was not me who made those purchases because they think their login algorithm is foolproof. Paypal is very efficient at helping you spend your money but are less so when it comes to standing behind their guarantee. If you deserve a refund you'd better have your case meticulously documented or you probably won't get your money back even when it's clear that you've been scammed. Paypal has a bunch of young people deciding the complaint cases who clearly do not understand the tradition of fairness and fraud in business dealings in the U. S. It's like they just go down a multiple choice test deciding cases without benefit of even reading the complaint.

Separate to that but noteworthy while I'm airing things out, petty Chinese scam artists are slick and get away with a lot that Paypal won't make them pay on. The scammers post phony adverts, selling goods they don't even have, under one company name, deposit the money under another name, send you a receipt under another name, respond to you with support under another company name, and then send you a bait and switch product you didn't order with no return address on the package, or with yet another company name and it's a real pain to try to figure that out when you have ordered multiple things online in a short stretch when all of it arrives on the slow boat two months later. They're taking advantage of the fact that there are legitimate liquidation sales that take place to get rid of bankrupt merchant's stock they have to move, etc. If you order multiple items within a short period, you need to set up a spreadsheet to keep up with who you bought what from and keep track of it as well as the name changes, or you may very well not be able to justify going to Paypal for a refund if you don't get what you ordered. You forget what you ordered even. In three of four cases Paypal denied my claim for which they say there's no appeal, "all decisions final," and my bank interceded and refunded my money and took it back from Paypal. All of the purchases I'm referring to were merchants under the "Shopify" umbrella for purchases I made from adverts on Facebook Marketplace or Instagram, "accessory" items costing less than $50 each, items that I had not seen for sale by other merchants. I'm done with that.

Thank you for summarizing your findings. When I have used CIZ it has been in occasional situations where I have just needed more reach for my adapted 400mm Canon lens on my a6500 and I wasn't using, or trying to use, any of the features you mentioned that are lost, tracking, eye focus, etc. I definitely lose some features when using adapted Canon lens but fortunately they are features I am not dependent on for the way I shoot and likely wouldn't use even if they were available to me. Thanks again for sharing your experience. That information will be helpful going forward in making decisions about lens purchase and shooting technique.

Pardon me - I meant to send this along earlier but got sidetracked. Here is the url to the help guide where the information is about using CIZ with the A7R4. There are a couple of diagrams that didn't copy and then there is more to the usage explanation that you might find useful:
https://helpguide.sony.net/ilc/1930/v1/en/contents/TP0002711809.html

You may have to put your camera in .jpg only mode to see the menu. I do not have an A7R4 or an A9II. My latest is an A7R3 so I'm not familiar with how the A7R4 may differ from the A7R3.

On the A7R4, from the "Help Guide:"

Clear Image Zoom/Digital Zoom (Zoom)
When you use a zoom function other than the optical zoom, you can exceed the zoom range of the optical zoom.

MENU → (Camera Settings2) → [Zoom Setting] → [ClearImage Zoom] or [Digital Zoom].

When a power zoom lens is mounted, move the zoom lever or the zoom ring of the zoom lens to enlarge subjects.

When you exceed the zoom range of the optical zoom, the camera automatically switches to another zoom than the optical zoom.

When a lens other than a power zoom lens is mounted, select MENU → (Camera Settings2) → [Zoom] → desired value.

Press the center of the control wheel to exit.

You can also assign the [Zoom] function to the desired button by selecting MENU → (Camera Settings2) → [Custom Key] or [Custom Key].

I did not check for the A9II

No returns, no refurbs. Not good for the sub-prime market.