I think the 35mm prime could be idea, it's a classic FF focal length which I find suits the majority of my photography. For me anything wider makes me a bit lazy and anything longer can be unsuitable for indoors. I can look at a longer focal length for my panos later.
My thoughts and a bit of a ramble if you (and anyone else) can be bothered to read and help me out with my ever worsening indecisiveness. Most of my experience is with Nikon, so I don't know much about Sony...
- Sigma 35mm f1.4: great for indoors and creativity, but will all that glass make focusing slow even with the HSM?
- Sigma 35mm f2: better for video with the stepping motor but how does it compare to the HSM when it comes to stills focusing, if slower, will it frustrate me?
Are native Sony lenses going to work better with the AF system?
- Sony FE 35mm f1.4: The DDSSM focus system appeals but the price not so much when compared to Sigma
- Sony FE 35mm f1.8: I'm not sure on this one, I can't help but feel I may as well get the 2.8 instead and be far more compact
- Sony FE 35mm f2.8: Not as fast and I'm not sure about the auto focus speed, but it's nice and compact.
I'm not ruling out:
- Sony FE 24-70mm f4 ZA OSS: Losing 3 stops over the 1.4. More flexibility and more importantly OSS which would be great for video work. But the AF speed may not be great? Also, it's physically quite big.
- Sony FE 24-105mm f4 G OSS: Losing 3 stops over the 1.4. Even more flexibility, also has OSS and has the DDSSM focus system. It's physically quite big.
Once I get the A9 tomorrow and get a feel for its physical size I'll perhaps be better minded to know what lens or lenses to get.
But now I'm thinking the 24-105mm is very appealing, it's wide enough for those indoor group shots and also long enough to take care of the pano stuff and also ticks a lot of boxes apart from size and aperture. I could also get the Sony 35mm 2.8 for when going out to certain places and travelling and I need to be more compact (although I can't see any rush for that lol).