I love my a7ii, which I bought a year ago. It was a great step from my old A700. But I am still not quite happy with its use in the evening/at night. I am thinking about upgrading it to a7Rii, and I would certainly do it, but I wonder whether it is too late to do it now, if the next camera is to appear soon? Would it make a difference for images like that:
I have both the A7ii and the A7rii. I dont think the A7rii brings much to the party to shots like these apart from the extra resolution of course.
Yes the A7rii is slightly better at higher isos, but the shots you show are basically shot at base iso and with a tripod - I just dont see the A7rii helping much at all here.
For a start I think your images look pretty good as is. But if you want to improve the image quality you could try a few things in the way you take these photos.
1) The first thing I would suggest is experimenting with taking different exposures for luminosity of the image instead of trying to fit it into a single exposure. If you expose for the highlights, almost by definition you are not going to maximise the exposure for the mid tones and shadows. And overexposing your highlights (as in image 3) effects the underlying IQ. Taking an exposure for the highlights and then a different exposure for the mid tones shadows enable you to increase the amount of light gathered for those tones often by 2 stops or more. You can then blend them in post. Even if you darken those tones in post there will be less noise.
2) I would also think about the timing of when you shoot the shots. (For instance image 3 was almost certainly taken a little too late in the day to get great IQ). More importantly, it is sometimes a good idea to shoot the mid tones and shadows earlier, wait 30 minutes or so and then shoot the highlights from the lights. Again you would have to blend the exposures in post (luminosity masking is great for this).
--
http://www.salintara.com
http://www.flickr.com/photos/robcoll/