I see that Adobe do a DNG converter program which converts various formats (inc PEF) to DNG, although it's a massive 50MB!
link

How about this:

start at Houses of Parliament (westminster tube, or easily walkable from Victoria too), cross bridge to south side, turn left (ie East) and walk past South Bank Centre/National Theatre etc all the way to Tower Bridge? Lots of things to see/photograph and you won't get crowds.

Also the City of London can be nice, eg nice churches dotted about.

There are some walking tour companies around, perhaps googling for them may point you at a good company or itinerary.

I would recommend an Oyster card and travelling by bus, as you see more and it's cheaper. Buses cost £1.20 on any bus route with Oyster (£2 for non-Oyster)- it's the same fare for 1 stop or the max number of stops on one route.

However, there is a price cap of £3.90 per day for Oyster users, so scooting about by bus costs no more than £3.90 on any day. Terrific value. See link

hope that helps.

you would get higher magnification with a longer lens, so the 70-300mm set at 300m would give most magnification and the 50mm lens the least.

hope that helps.

I don't know which is the better lens, but the Pentax smc DA 15mm F4 ED AL Limited lens is £579 at SRS but the smc DA 14mm F2.8 ED (IF) lens is only £519, so perhaps the 14mm would be a better bet as it's cheaper and faster???

PS Just noticed that the 15mm is a Limited lens so I guess that accounts for the difference.

I'm getting a 50mm f1.7 from Mike-P soonish, so I'm eagerly looking forward to that.

Re 135mm, can't comment on the Pentax one, but I've got the Vivitar 135mm f2.8 Close Focussing lens which is quite nice, in that it's almost macro (it goes to 1:2).

sample image of a butterfly in my back garden:

Mike,

I started from the computer term "drag and drop"

PM sent to Mike.

Lovely photos by the way!

haha,my bad, was 11th August 2010.

Currys have the K-x DSLR plus the 18-55mm and the 50-200mm zoom lenses at £449 inc free delivery. There's currently a voucher code SALES5 (valid until the 11th of June methinks) which drops the price to just under £428.

see this link

I have no connection with this shop in any way.