Just bought this week the Sony 20mm f1.8G lens. It will replace the Voigtlander 21mm f3.5mm lens and the Tamron 17-28 f2.8 lens, both of which are very good lenses themselves. But 20mm was one of my favorite FL with my Nikon FF gear and I wanted a fast 20mm prime for Astro photography and from all reports I have seen this new Sony 20mm G lens is very sharp across the frame and it will do the job. Being a prime guy, my feelings are the 20mm will be just fine for my travel photography, as if I need a bit wider I just take a few steps back or with the A7RIII, stitch together a quick 3 shot vertical pano.
So 2 years into Sony, below is how my 5 lens prime kit now stands. Mostly I use my Sony for my outdoor nature portrait photography as its eye/face detect can’t be beat, the Batis Sonnar 85 and 135mm are used the most by far ( and yes I have an aftermarket metal screw on hood for both). I use the small 35 and 55 Sonnar ZA's together with a Godox 350S flash in a small Domke bag for my “wife kit”, as she loves to have her photo taken. These 2 small and compact, but very sharp lenses, is one of the features I love about mirrorless cameras.
Sony 20mm f1.8G
Sonnar 35mm f2.8 ZA
Sonnar 55mm f1.8ZA
Batis Sonnar 85mm f1.8 w/OIS
Batis Sonnar 135mm f2.8 w/OIS
For any sports, airshows, nature I have the Sony 100-400 GM lens plus 1.4x TC.
Apple
iPhone SE (2nd generation) back camera 3.99mm f/1.8
4mm
f/1.8
1/40s
ISO 320
Changes I have made in the last 2 years:
Upgraded the Sony FE 85mm f1.8 to the Batis 85mm f1.8. I like the Batis rendering better and find the OIS very useful.
Bought the 24mm f1.4 GM, but it just didn’t seem to be a FL I used that much in the year I had it, so I sold it. Also bought and sold the Sony FE 28mm f2. I prefer a 35 or wider like 20mm.
Upgraded the A7III to the A7RIII and just love the upgrade, 42MP is awesome!!!
I feel that this kit is now (almost

) perfect for me, the only change I can see is adding the new Sony 35mm f1.4G lens, as I am more of a 35mm shooter vs. a 50mm shooter. Plus it’s a 67mm filter size, so I will be set as the 20, 85 and 135mm are this size also. While I love the 35mm f2.8ZA and won’t sell it, having a 35 f1.4 for many shoots would be a great addition for environmental type portraits.
ps, Thought best to would resurrect this thread, rather than start new. Maybe some of the past contributors will show what may have changed.