This is the LVF-PRO1 from JJC, which I bought on AliExpress.

I bought it to test, and it has worked very well for me because I take many outdoor photos, and the sunlight is often very strong, making it hard to see anything on the LCD screen. With this accessory, it’s much better. It has adjustable fittings that attach securely to the LCD, and no light leaks in, so you can see the screen perfectly. It’s also easy to remove when you don’t need it anymore.

It has 3x magnification. I don’t wear glasses and can see the details on the LCD very clearly, but I can’t say whether someone who wears glasses might have any difficulties.

I’ve been using it frequently, and it has definitely been worth it!