I got one the 2X-S converters this weekend, price was great so I thought I'd give it go. Public lens tests isn't something I normally do. I hope (not with this tread) is to provide visual evidence to the which is better, using a teleconverter or cropping, but for that I need a better day outside so I can do the shots at a range that you'd likely be using it at.
This was inside at about 20ft, shot with a K5 at f5.6/ISO100/Using mirror lock up and a wired release. I let the setup to stabilize for about 5 seconds after activating mlup. My first impressions are good, I was expecting even softer results. With a eqiv fov of 900mm, hand holding will be very challenging. DOF is so thin that it is hard to focus. 900mm is longer than anything I've shot before, so I'm sure there will be a learning curve in both handling and focusing. It's a cold grey day out, I tried to shoot from inside the house at a tree trunk on other side of the river, about 300ft away. But the warm house air hitting the cold outside air caused issues, in liveview the screen looked like jello. I've already learned that my tripod head (if not legs also) need upgrading to use this combo.
First shot is a full frame image, processed in LR4.2. The 2nd is a 100% crop with no processing beyond the crop and save. I'm guessing there may be some K5IIs owners grabbing one of these, or at least I'd be interested in seeing. Edit: a for what it's worth post I guess, I forgot about taking a bare 300mm shot...
Last edited by Riv; 11-04-2012 at 02:25 PM.