Small aperture (e.g., f/16) big depth of field, slow shutter speed (relatively)

Big aperture (e.g., f/1.4) shallow depth of field, fast shutter speed.

Choice of aperture depends on (a) how much DOF you want (do you want just the subject in focus and everything else blurry? Or everything sharp) and (b) whether the shutter speed is of importance or not (i.e., if hand-holding you'll need a faster shutter speed than if on a tripod, if photographing moving objects you'll probably want a faster shutter speed that photographing something static).

I, personally, use Av mode. I change the aperture to get the DoF I want whilst keeping half an eye on the shutter speed to make sure it isn't too slow. If I was photographing something moving where DoF is less of an issue than shutter speed (e.g., an air show) I would use Tv mode. I have never used TAv.

The only wrinkle in this scenario with digital is that it is possible to change ISO between shots too. So, if you wanted a good DoF but the shutter speed seemed to low to hand hold, you could up the ISO to get the settings you want.

I hope this helps!

K.

I don't normally have that lens attached when I am walking about with the camera around my neck but I was being lazy... Oh well. The worst one I have is the old push-on metal cap for the K series 15mm. I think the foam on the inside is compressed so it just slips straight off all the time.

Best wishes, Kris.

Thanks Mike.

K.

I said I was waiting for the macro shots

Lovely colours in the first one, and I rather like the composition in the second. Nice shots.

At the Met, Feb 2010.

Viewing




Drawing




Listening




Best wishes, K.

I had heated handlebar grips too until they misfunctioned the other week and burnt my hands through my gloves!

K.

Mike... is it one of these or one of these:

Many thanks, Kris.

If anyone has a Sigma 50mm EX DG macro lens would you mind sending me a quick snap of the lens cap? I lost mine on Sunday while out walking and want to get the correct one to replace it.

Thanks, Kris.

I did go through that puddle, slowly, and with my feet up on the engine block!

Sky hooks... interesting idea

K.

On my way for a walk on Sunday I met with a small problem...




During my walk we spotted this. Why :




Neither photo is of any artistic merit!

K.