Why are sensor spots....

more visible with one particular lens?

Managed to get a couple of shots of lynx helicopters in flight (55-300) and quite clearly there are some dust spots, quite a few, now at first they weren't visible on other lenses, but after playing with the 18-55mm managed to get them visible but only just, they don't show up on the dust image either.

it's probably not so much the lens but the apertures that your using, the smaller the aperture the more pronounced dust bunnies will be, try snapping a plain white wall or piece of paper at various apertures and you'll see the difference.

Aye just had a look through alot of my other pictures and most were around f8 so not so obvious, but I think with using shutter priority the aperture was closed right down making them really obvious.

Good news for me though I managed to get rid of the bunnies, between the shake system lots and lots repeat operations and a blower got rid of them all.

Out of curiosity does anyone have any experience of the following kit

http://www.wilkinson.co.uk/just-intro-dslr-cleaning-kit-type-2-aps-size-sensor.h...?

there is a larger version with a larger amount of bits inside. This is the only walk in shop I have around now and not too sure about buying off the bay.

I have used the one use pre wetted ones , found them easy to use and does the job well, handy to keep in the bag too.