Originally posted by dubyam Certainly there are folks with lesser equipment who make fabulous photos, and folks with the very best equipment who can barely take a passport photo. But then there are folks who learn the process and develop the skills (what I'm trying to do at this time) who end up making some pretty big improvements in their image quality by acquiring better equipment. A good example is the limitations of my early 1990s F 100-300 zoom. Yes, it gets good pictures. But if the lighting isn't absolutely ideal, I get plenty of fringing and halos, not all of which can be mitigated in post processing - or at least not in processing as I'm able to do it right now. So when I swapped up to an 18-135WR, for the limited shots in the same focal length range, I have much better images from the 18-135 than from the 100-300. Since I'm still taking the picture, and the camera body is the same, I'll use my deductive reasoning to ascribe the improvement to the advances in coatings, lens mechanics (especially autofocus), and glass production (or, more specifically, production at affordable cost points). Sometimes, equipment does make a difference. Now, to be sure, I'm not creating great works of art, and I'm sure the OP would refer to my images as weak, because they're not the kind of oversaturated, colorized-looking stuff he likes, but for me, taking an image with one lens, swapping, and taking the same image with another lens at identical focal length, aperture, and shutter speed, on the same body, tells me that sometimes, equipment matters, when I see that the second image is better than the first.
It's difficult to think it's relevant when you start talking about people using equipment designed for a different medium. Film lenses don't purple fringe on film, but many do on digital. So you need to level the playing field there. Your 18-135 was actually designed for the medium you use it for. Your example though is perfect for when better equipment is needed. You are getting good images, but in the area of your interest, they could be better.
If you do macro, and like doing little insect's eyes etc., you can be better with extension tubes. If you're like me and most of your macros are small flowers etc. then the extension tubes would be a waste. Owning better gear would make no difference because I wouldn't use it. But my point would be, it's your experience that tells you what high end equipment you need. God knows, you won't be able to afford all of it. High end equipment become necessary when you start to specialize. You can never say high end equipment is completely irrelevant, but it's only relevant for the experienced. Experience without high end can accomplish a lot. Inexperience can accomplish very little no matter how much high end stuff they own. A lot of experience, specialization and appropriate high end equipment is king.
Some may buy high end equipment and then try and gain experience. That's expensive and doesn't necessarily work. Especially if you're of the opinion that you can figure it all out on your own. I always advise against it.
My example would be buy the macro lens, explore it until you understand it's limits, then decide you need the extension tubes. You may be fine without the specialized gear. But either way, your decision to purchase or not purchase high end equipment is informed by your experience.
Personally it took me 5 years shooting with my Sigma 70-300 to decide I was taking a lot of images at 300mm and decided I'd do better with something longer and sharper. But there are still Sigma 70-300 images in my "best of" folder on flickr. The time shooting with lesser equipment isn't lost. Buying better lenses was an expression of my interest and willingness to use better gear, than a photographic necessity.
I've added the DA*200, bought as a back up for when my DA*60-24050 is out of commission and my Tamorn 300 2.8, both of which offer increased capability. Experience taught me that was something I was interested in doing. But bottom line, I ended up buying the DA 55-300 PLM to replace my Sigma 70-300, because of the capability the Sigma had the others don't. I wanted a $3000 lens, but I still wanted a 70-300 type $400 lens. Because they both have situations where they excel.