A Beginner's Guide to Photography 3 Zoom Lenses 

Thank you Mark and for your continued support. I am hoping to spend some time at the Causeway Coast in Northern Ireland and many other programmes are in the planning, so keep watching. Derek.

Thank you, I will do my best!

This question comes up frequently. Spot-metering is a craft, every picture is different and success is based on experience and I didn't get it right the first time! A programme based on church interiors explaining my technique is scheduled for premiere to subscribers on 5 July, preview to members 31 May. Regarding locking the exposure, I can explain that now. On Olympus/OM System cameras when you set the AF Mode to S-AF (not C-AF), half-depressing the shutter-button before taking the shot will lock the exposure but don't release pressure on the button between the two disciplines. You will lose the reading. This may be different on other camera makes.

Thanks Derek

I use both, having no preference. On a long walk I prefer the 12-45 Pro