This thread has had me laughing - in recognition of the problem!!! Many many times has the wrong lens been on the camera - or worse the camera in its rucksac - or many years ago (while a corncrake walked next to my car door while I looked down out of the window at it
) it was 'safe' tucked out of sight down behind drivers seat .........
I've been slow at learning lessons but more than half way thro my 50's I'm finally getting there (tho mistakes are made these days cos I forget - not cos I don't know - just wait for that scenario to catch you up - and it will
) But now I carry 6 or 8 batteries (and on a recent fungi trip went thro all but one
cos of usisng live view and one battery got thrown in the bin - end of its rechargeable life) I also have a little bright yellow (floating!) case (bought from 7day shop) that holds 8 cards - 3 of which are 2 gigs - plus another 3 spares tucked into the special little holders in my pack .......... I won't go higher than 2 gig - I prefer to change cards - than have alll my eggs on one and find that there's a gremlin in the middle which stops me downloading ........
The big lens travels on the camera now (tho we don't always put that on as soon in a journey as we should and have missed things) and if a scene presents itself then a quick swap - but always back to the big lens - ready for the next oportunity
Pauline