SDI converter

Hello, I am an eye doctor, not an AV expert or professionalZ. I need to record out of a camera connected to a surgical microscope. The camera is a 3-chip HD camera with 3 1/3 HD progressive MOS sensors. I will record out of a HD-SDI output with a 720p/50 1080p/50 (PAL) or 720p/59.94 1080p/59.94 (NTSC) output. I wanna record into a MacBook Pro. Which Blackmagic SDI converter would give me the best video quality? Thank you!

You might look at this: UltraStudio Recorder 3G.

Your MacbookPro is a recent one ? be shure all devices have the same version of Thunderbolt.
You could also think about the Video Assist from BMD, it's a monitor with recorder, it records to SD flash card,
which you can put into any computer or laptop with SD card reader, the Video Assist comes in 5" or 7" screen.
if you are using a microSD card in a adapter to regular size, you can also put the microSD into your smartphone (Android)