The point about lenses is they are the only thing thing between your subject and your recoding medium. This is what Arkady was trying to point out.
A camera is nothing more than a light tight box with a hole through the middle - once you have tripped the shutter. That is all ANY camera is....they have some peripherals added on around them, but they only come into play BEFORE the shutter is tripped.
Don't believe me?
Do the mirror-up thing for cleaning and look inside.......all you will see is the piece of silicon film at the back of a fuzzy lined black box. In a film camera, open the back as well and lock the shutter open with the bulb or T and you will look right through to the floor behind it! Just a big hole with a black lined box around it.
Now, put your lens in front of the big hole and point it at something.....the same thing happens as when you did the trick above. There is a lump of glass which directs the light through th ehole onto your film (whether gelatine/silver or silicon dioxide)......it is only the electronics doing the bit of mental arithmatic that has changed, and the size of the silicon crystals if you are not using film. The rest of the taking process is exactly as it was when Fox Talbot first painted some goo on a piece of glass about 150 years ago.
So, your lenses are the most important pieces of the photographic puzzle.
Now you'll get the boffins telling you that is all rubbish, and that it is technique and lighting and all the other fuzzy stuff that makes photography....no it isn't, wihtout that piece of bottle bottom you can't use your lighting or techniques!
As for photoshop.....that is for designers to use. REAL photographers don't even own a copy! (ME...I just use the Capture NX that came with the D3 - it does everything I need editing and RAW production wise.) My computer isn't calibrated to the offices around th eworld computers, so if I muck about with th epictures...they only have to muck about with them again putting them right fro their screens....so I just shoot digital transparencies, get it right in camera and give it to them as is, exactly as I did when I used E6 (which you couldn't fiddle with at all).
I think being able to get it right in the camera is a fundamental.
Now, where were we before I sidetracked the whole issue.:bonk: