Also the website is down, so I don't know what models there are and what is the best. Or anything about it, such as flipping or light loss. Thanks again
I think there is just the one model. Not sure what happened to the site or to James (pretty sure that's his name). He used to post alot, but I haven't noticed him around online in quite awhile. I don't think there is any flip unit.
I have one. I use it mostly on a Sony A1U though. I also added a condenser to mines. It's basically a thorlab tube so it's easy to tweak. It's lightweight and doesn't require power. The problem is I have to use it almost wide open all the time otherwise grain will show. Also, little pieces of dust and specks collect over time. There are some specks that I can't get rids of no matter how much I clean. Fortunately it's not that noticeable perhaps because I usually output to SD. I'm looking into get an SG Pro.
I got mine second hand for around five hundred bucks and I love it. I use it with my Dvx100b.
Pro's:
-beautiful bokeh
-good in low light
-easy to clean
-easy to use
-static design = no batteries or parts that will break
-no problem using high shutter speeds(ala saving private Ryan)
cons:
-need to keep it clean or dust will build up (But I think this happens with most adapters)
-Grain can appear if you use it at high f-stops(But, I bought it for shallow depth any way)