For many, many years, since the early 1990s, I was a "Nikon Girl," shooting my way through various SLRs and later Coolpixes and DSLRs, but one day some years ago a friend introduced me to the world of mirrorless cameras, showing me his Sony NEX 7, and I was fascinated with the new technology and advantages mirrorless was bringing. Bought one and loved it, but still also keeping and using my Nikon gear as well, and then along the way bought Sony's wonderful RX100 compact cameras and then later the RX10 IV "bridge camera," and was very pleased with them all. The Nikon gear spent more and more time closed away in cabinets, bags and the Pelican case.....
When the Sony A7 III was released, I became really interested and started thinking more seriously about going with full-frame with Sony....it was a big decision, though, and to make a long story short I dawdled and dawdled with the decision, first shifting from the idea of going with the A7 III to the idea of going with the A7R III.....and then Nikon interrupted my process by introducing its new mirrorless line of "Z" cameras and lenses so I waited a bit longer to see how that was all going to work out. Nikon let me down big-time by not having any macro lenses at all in its initial lineup of lenses or even in the roadmap they first showed, and I wasn't interested in fooling around with some adapter and my older lenses (some of which wouldn't work well with the adapter anyway). For me, a native macro lens was a "must." Back to the drawing-board..... Then, I was just about to take the plunge and get a Sony A7R III when wouldn't you know it, Sony announced and eventually introduced the A7R IV! I waited a while longer to see how reviewers and actual real-time users were responding to this new body.....
One thing which was absolutely first and foremost in my mind, regardless of camera bodies, was the native lenses that Sony had to offer, and I was particularly interested in the 90mm macro, which had consistently received high praise from users and reviewers and which would be number one lens on my buying list. So one day in November I said to myself, "OK, time to stop this wishy-washy waiting around -- you want a new camera? Just DO it!" and I traded in my Nikon gear plus that Sony NEX 7 on a shiny new A7R IV and, yes, that prized 90mm macro lens plus the shorter 50mm macro and in a last-minute switch, went with the gorgeous 135mm f/1.8 GM rather than the all-around 24-105mm I had been intending to get. Je ne regrette rien. I am more than happy with my current gear. And, yes, that 90mm macro lens all but lives on the camera full-time; it is the lens I seem to reach for time and time again.....
Yep, lenses are not inexpensive, are they?! Ouch! So far I've been very pleased with the six Sony lenses I have so far and they have all fulfilled specific needs and purposes. Got a couple more on the wish list and in time they'll arrive in the household, but there's no big rush for that. In the meantime I've been loving what I have been seeing with the lenses I have.
One of the first things I bought, too, was a set of Kenko extension tubes for my E-mount body and lenses, and they do come in handy now and then. I also already had a Canon 500D closeup lens in one filter size as well as a Nikon T-6 close-up lens in another filter size, so from time to time have experimented with each of those, too.
Since I still have my Sony RX100 M7 and my RX10 M4 along with my A7R IV, with regard to photography this is now a totally Sony household, but I don't use the other two cameras all that often, since my A7R IV more than does what I want. I love this camera so, so much!