I mentioned the cornerproblems in a thread 10 days ago, but no one picked it up. Carl mentioned it too somewhere. People are beginning to wonder what's going on here.
Now to me, as I have practically zero knowledge about optics and sensor electronics, it's a riddle wrapped in a mystery inside an enigma.
All I can say is this:
- the corner problems are not just in 28 Cron shots, below you can see corner crops (f1,4 and f5,6) from a quick test I did with my pre asph 50 Lux. The IQ does seem to improve as the lens is stopped down. It's the same with the 28 Cron.
- I bought the 25 D Lux especially for my G1 and I'm very pleased with this lens. I like to keep it on my G1 all the time, but, the same kind of shot with tree branches in the corners of the frame show a lot of CA at f1,4 when opened uncorrected in Silkypix. When lens correction is applied in this raw converter things start to look a lot better. The same shot at f4.0 looks just fine.
- The first adapter I got from a well known German manufacturer was too short, and focussed way past infinity. The replacement they sent me two days ago will not focus past 10 meters, so back into the box it goes. I'm sure they will eventually get it right.
So, not being a technical guy, I'd say that from all this, it seems that the G1 sensor relies on post correction heavilly. Indeed the kit lens is very good, but than again, it's widest opening is f3,5...
The adapters, not just the one I mentioned, are another uncertainty. To what extend these adapter problems deteriorate the IQ I really don't know, and I'd very much like to find out.
All in all I'm a happy customer and I took 3300 shots with the G1 in one month. I like the ergonomics, and the value I got for my money. I'm hoping Leica or Olympus will come up with another µFT body that's a good addition to my G1. I would buy it in a heartbeat and get a complete camerasystem for fast documentary work.
Now I hope the text above and the samples below will help to further explore and get to the bottom if this.
Cheers, Peter