How have you got your photosso sharp though or is that the quality of the lens and your skill.?
That is a very interesting question, and to be honest I don't know the answer to it; it's been puzzling me and I think some other people too for a while now. On the face of it I shouldn't be getting particularly sharp images. Most of the time until recently, and some of the time still, I use a bridge camera. This has a tiny sensor (the same size as the sensor in a point and shoot), and that tiny sensor is not capable of capturing as much detail or the range of brightness that a camera with a larger sensor can, like a dSLR. Bridge cameras also have a general purpose lens which goes from quite wide angle to quite a lot of telephoto. These sort of lenses are inevitably less sharp than special purpose non-zoom (prime) lenses made especially for macro work. I then put a cheap piece of glass in front of this not very sharp lens, which can only make it even less sharp.
I then do some other things that make the situation even worse. It is quite widely known that if you use small apertures you lose sharpness. Well, in order to get the most depth of field I can, I often use the smallest possible apertures, and that means I lose a lot of sharpness. For example, all eight of the examples posted above used the smallest possible aperture on my bridge cameras, f/8. This produces depth of field which is roughly the same as using f/22 on a dSLR, and it means it loses about as much sharpness as using f/22 does on a dSLR.
I also use autofocus almost all the time, which many people say you can't focus as accurately as with manual focus, and so you lose sharpness. I use slow exposures compared to most people - for example as slow as 1/5 second sometimes when photographing moving snails in poor light, and that obviously means not very sharp images. And I shoot in a breeze a lot of the time (I live in a windy location); more loss of sharpness. And I use natural light a lot of the time, for example all eight of the examples I posted above used natural light, and you can't reveal the amount of detail and get the sharpness with natural light that you can when using flash.
So what on earth is going on? Like I said, I don't really know, but I suspect there are several things at work here. One is the business of using small apertures. This does lose sharpness, but it also increases the depth of field, a lot, and having a wider depth of field can make a photo
appear to be sharper.
Another factor is the size of my photos. You never see the full size originals of my photos - they quite often look quite nasty if you take a close look at them. I produce photos 1100 pixels high for viewing on screen. I don't often print my photos, but if I do I almost always use quite a small size, A4, or, very rarely, 16 x12 inches.
I think that autofocus can be better than a lot of people think, although this depends on what camera/lens you are using.
Sharpening has to do with making edges sharp, but I work quite carefully in post processing to adjust the distribution of light in my images to make them as
clear as I can, and this may make them look sharper too.
I take lots of pictures of the same scene and go through them all afterwards and picks out the best of them. even when taking the same photo with the same settings and technique, the sharpness from image to image can vary a lot. For the most part I only use the sharpest ones I come across and throw out the rest.
And I don't crop much.
And finally, there is the issue of "How sharp is sharp enough?". I think what this boils down to is that my images may not actually be particularly sharp if you take a close look at them before any processing is done on them, but for the size I produce them, and the post processing I do on them, they may be sharp enough, and clear enough, and with enough DOF, to look ok, sometimes with compositions and colours that might take your mind off the sharpness a bit as well.