Could people please list some lens they use that don't vignette with the 2.1 Especially Canon mount or C mount type that might be available on ebay. TIA.
I owned quite a bunch of lenses and got to play with loads more. And from my experience, almost all Lenses With an Focal Lenght shorter than 50mm in terms Of C-Mount lenses Will Show Vignetting on the Really Large Chronos Sensor. Also in General stay away from C-Mount Zooms for use on the 2.1 (there are some Zooms that will work well on the 1.4 but since you ask about vignette, i assume you want to use it on the 2.1 at full Resolution...), they will all vignett, some of them Really badly. Lenses of 50mm and longer Longer are usually good to use on bigger Sensors, like the Chronos one, and there are also a bunch of 25mm C-Mount Lenses that will show only little Vignett on the 2.1. Stuff like 16mm focal Lenght C-Mounts usualy show pretty heavy vignetting, and there are a few lenses that are even wider than that, but its rare to find some, that will propperly cover such a large sensor.
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C-Mount Lenses can work well for you, but For a sensor like this, especialy if you are after Image Quality for cheap, i would look after broken Bigger Format lenses (if you are able to fix them or know whatever is broken wont matter for your use on the 2.1), totally agree with chrissie_c on that question.
I myself got an Sigma AF 24-70mm 2.8; an Nikkor AF-S 70-200mm 2.8; an 100-500 Lens of a brand i cant remember right now, its pretty decent; an 0,64x Metabones Speedbooster and an Teleconverter for less than 350€ for all of it. They where all bought from different sellers and i had to do quite a bit of Lens hunting over the term of half a year to find those as cheap, but they are Really worth it and Image Quality is on point for those. All of those where broken to some degree, the Sigma one was literally broken in half (put some work into it and got it working again), thats why i got them so cheap. That is for Nikon Mount however, i dont know about the Canon Lenses, could lead to some Problems with the Apperture Control with broken Lenses. Great thing about The Nikon Glass is that almost everything can be done without the Electronics inside, so easier repair.
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I personally still use my C-Mount glass like 60-70% of the Time on the Chronos, just because i got way more (and better) lenses for C-Mount right now for most usecases and because they are usually just way less bulky for Macro and such.
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If you are still interrested in C-Mount lens options, it would really help if you could provide some more info about what kind of Focal Length or usecase you are approximately looking to use them for, would make Reccomendations a lot easier.
