See the Green Painter's been in again!:

Most macro lenses start to fall off at about f/11 under high
contrast lighting, but you can usually get away with f/16 - f/22
under flash.

With poor low contrast lighting there isn't as much resolution
and it doesn't fall off very quickly. The 90mm Tamron f/2.5 looks
about the best lens to use at f/16 under low contrast lighting
(source AP Test) because it's almost a level line from f/8 to f/16
which was the smallest aperture in the test. Good lighting is
preferable for macros.

Bestcameras are on the list, but under the name of the retail
shop so it's OK plus you get a 3 year guarantee and some
goodies free. Kamera Photographic Ltd

MF is usually better for Macro shots. The subject is
usually quite large in the viewfinder and you should be
able to see exactly where the focus is.

For flat objects like coins, stamps etc. AF should
be OK.

All nice shots, but another one here who likes the squirrel best
and it's not even a duck

I've never seen a BOP at a wetland centre.... can't think why not?

Very nice, you would think it was summer not November

Has anyone used Sandisk Batteries!

It should be a considerable improvement and I imagine
quite a lot of work. I'm sure it will be well appreciated

Amazing shots he must be mad!

Get the "Image Zoom" addon for Firefox gives all sorts
of options inc. "Image Fit" or +/- percentages.