"I think the muck gets in through the dioptre adjusting slide"
I gather it also gets in through the lens even when the lens is not removed from the camera, zooms being the obvious culprits. The WR lenses should be better I imagine.
After my *istD which got measles every month I can't get over how little dust gets into my K-7 or at least how little shows on the sensor. A quick few puffs with a Giottos Rocket occasionally has done the trick so far.

I've bought my lenses on ebay & the experience has been satisfactory apart from a 30/1.4 Sigma which was a dog & which I returned.

I always check out the seller first & ask questions if at all doubtful but basically if there's any doubt in my mind I steer clear.

"took photographs in a pulic place".
Lucky it wasn't a pubic place!

FWIW, without having read more than a few posts in this thread, I can only say if you want helpful critical assessment of your photos this is no the place to be.

I see no conflict between helpful (& strong) criticism & an enjoyable site. If you want to improve your photography firm but polite criticism - even controversy can be beneficial.
However the average comment around here is an anodyne "lovely shot" or similar regardless if the photo is great or fatally flawed. This helps no-one.

I proposed to one member that we make more incisive comments on photos but he ran a mile.

Would I appreciate more incisive comments on my photos? You betcha.

This is easily the best because you moved in close Shaun & it has that feeling of intimacy & immediacy that gives it impact & interest.
John's comments, particularly "getting in close pays dividends. Notice how much more intimate it is and how there's a feeling of being involved" are on the mark.
Don't give up.

Strange isn't it. I have no problem photographing people in the street at close range when I'm travelling overseas but here at home I find it intimidating.

The fact that Ricoh made some K mount SLR's gives one hope that they will continue the line.

Agreed John but *sense* doesn't always come into the equation.

Because Ricoh might want the Pentax technology but might ditch the K mount. Uncertainty. That would leave K mount owners up the creek.

I answered "not sure" not because of Ricoh but because I'm dithering over a DA 15mm f4. Will I or won't or should it be another lens for Street.........