On 28/07/2015 13:41, Savageduck wrote:
On 2015-07-28 07:25:49 +0000, Bill W said:

snip

Spots (dust spots anyway) are more likely to be on the sensor than the
lens. It is worth learning how to clean the sensor if you are using a
DSLR or a mirrorless system.

snip

Please excuse the hijack - any top tips? My Canon 40D has some now
irritating spots of muck somewhere - the sensor I think.

--
Cheers, Rob