Louis;
Glad to hear you're getting used to your M camera. I agree with Bob's comments above - it takes a while to get used to the M, & using it exclusively for a while is the best way to become comfortable with it.
I'm not suggesting you sell your M7 for an M3, but I also agree with Bob's comment about the M3 having a great finder. It's the only M I currently own - I kept the M3 instead of the M6TTL.
Onto focusing - one of the great things about the wide-angle M lenses (& the older 50mm lenses) is that they have a focusing handle on them. This seemingly innocuous feature actually contributes to getting your image really fast on the street, because you can have it in focus BEFORE you even raise your camera to your eye. In practice, if you already have your subject in focus before you even raise the camera, it will beat even the finest AF systems (my favourite AF system is the Canon EOS), as they require a split second to lock on. Maybe that's why the Leica M camera is still relevant for street shooting, even with today's fantastic AF SLR's.
Try this practice with your 28mm -
1. Set the focus on infinity.
2. Focus on something at a moderate range (4 metres or slightly further). Note where the handle is positioned. Return to infinity.
3. Without raising the camera to your eye, move the handle back to where it was where you focused. Raise the rangefinder to your eye. Check to see if you got the range correct.
4. Practice this at different ranges.
After a short while, it's surprising how accurate you can be. Don't forget, that a lens as wide as a 28mm also gives you some leeway in apparent depth of field, so even if you're off a bit, but you're stopped down moderately & you're not shooting anything at under a metre for your shot, you'll probably be in focus.
If you do this enough times, you'll get to a point where you don't even have to return the handle to infinity. You'll instinctively know where to position it to focus on 3 metres, 4 metres, 5, etc. is.
If this sounds complicated, I'll tell you this - playing a musical instrument or practicing swordmanship is worse! This focus technique is pretty easy to master.
For your 90mm, it has no handle & it's a telephoto, so focusing with the rangefinder is obviously best.
About the magnifier - check the entry here on the forum about it under M Accessories. I haven't used it, but other Forum users seem unimpressed.
