David Fry

Are you using the high base ISO 4000?

I had the same question several years ago when I was considering buying a used F3 with the lenses. I couldn't find and information other than people complaining that they were plastic. I asked the DP, who was selling the package, for his honest opinion. He said, whenever I need a wider or a longer focal length, he used Cooke S4's and nobody questioned it in post. That was all I needed to hear. I still own that F3 but I have since purchased the full 6 lens Cinealta set for my F55. Nobody asks for the lenses, specifically but NOBODY ever complains about the image they produce. I have used them on Alexa, Reds, C300 MK2 and even my FX9 in FF 5K crop. That was a long way of saying you will be very pleased with Sony glass.