Originally posted by hadi pardon my ignorance, as this is definitely not my field, but if you want to save some money, why not look at the sigma 135 1.4? based on the reviews i've seen, they both act very similar. only time when the sigma struggles a bit is in low light situations. folks like Manny Ortiz and the Northrup seem to agree to that as well.
The Sigma 135mm is an excellent lens optically, but it can't keep up with cameras like the A9. The A9 tracks and adjusts focus 60 times every second and it needs a lens that is capable of also adjusting focus at that speed. The second reason is that the reason a lot of people will by a fast 135mm (F/1.8) is because they shoot in churches or basketball/hockey arenas were the 135mm focal length is great for sports, and they need a lens that can focus fast in those low-light conditions. People by F/1.8 because they need low-light performance, so when an F/1.8 lens struggles in low-light that's kind of an issue. Of course if you are using strobes and HSS then the Sigma would be a great choice and the images are every bit as good as the Sony 135mm GM.
I was going to sell my Batis, but I think I will hold on to it for a little while. I don't use 135mm as much as I use to. If I was constantly using 135mm and needing faster glass it would be a different story. The 135mm GM is probably the best 135mm lens ever made.
---------- Post added 04-26-19 at 10:16 AM ----------
Originally posted by Pentax_WA awesome. just bought my A9. btw, I think I have seen this little kido's picture somewhere on BH website, perhaps lens review section?!
Yes. I love the 35mm Sony/Zeiss F/1.4. It's probably not as sharp as the Sigma, but it's still exceptionally sharp and it has better bokeh and character. A lot of people seem to have issues with this lens, but my copy has been excellent.
I need to write a review of the Sony 100mm STF. Its a more challenging lens to use, but the results are very good. The bokeh is amazing when used correctly. This is one reason I cancelled my Sony 135mm GM order.