Hi all I recently picked up a used Nikon D300 (which is now my favourite thing in the world!) along with a functional AF 70-300m lens. So far, although I’ve a lot to learn, I’ve taken some reasonable shots as I get to learn how this camera works. One of the reasons I decided to dive into photography now is a fascination with old lenses and the potential to link old (good) glass with more modern kit, especially if it can be picked up on a budget. Now, because of the mount, I accept that Nikon isn’t necessarily the best option for trying vintage lenses but when I ordered the camera, I also sourced a mint Carl Zeiss Jena Sonnar 135mm, thinking that a cheap adapter (without glass) would be fine. Although I’d no sooner ordered before doing some further research which suggested that wouldn’t quite be the case.... Anyway, the lens and adapter arrived and I prepared for the worst.....Wow! I was wrong - the detail and colour is incredible, a huge step up on the more modern (but basic) Nikon zoom I’d also purchased. I knew that the lens wouldn’t talk to the camera and that I’d be manually focussing but, close up, this thing is a revelation! So that leads me to some questions which I’m hoping you knowledge folk can help with: 1. Of course the Zeiss lens won’t focus to infinity, so there are limits to what I can shoot, but is this ever likely to cause a problem? 2. As the lens isn’t talking to the camera, how do I best set the non-cpu data? Is it worth using whatever aperture setting I’m using at the time? 3. As a newbie, P mode is a big help, but with this lens I may be better served with A, S or M mode - any tips here would be very welcome. 4. Is it worth going for other M42 lenses (Helios for example)? Any help here would be very gratefully received!