I'm a collector of JAV but I limit myself to only downloading HD ones (720p minimum). There are certain girls that I collect on so I try to collect all their videos. However, I'm running into the problem where I can only find the SD version and not the HD version. What's the reason for this? Shouldn't all modern JAV be filmed in a high resolution and thus be able to be ripped into both an SD and HD version? Also, can someone explain about ISO? ISO is supposed to be like a straight rip from the DVD right? But alot of times the ISO has the same resolution as the SD version, and not the HD quality that I'm looking for. Is this taken as evidence that that particular title was filmed that way and there's no way of getting an HD version of it? This might be very common sense question but I'm not too knowledgeable in the area ;^_^