I started just trying to get bird images, then I set up feeders on my porch so I could shoot through the kitchen window, (and a serious mouse in the house problem ensued.) Then I moved the feeders away from the house and got a blind. I believe wildman doesn't have a blind but he can sit still enough not to freak out the birds . I'm a fidgety, always fixing something, if I'm not in a blind I usually freak out the birds. So, it's been a long slow process to get to here. Plus many of my best images happen during migration when the birds will just swarm around me to get to the food, before the other 400 birds that are in my yard do.
Often when I'm waiting for the birds to show up, I'll sit there, thinking, things like "I'm too high up for the ground feeders, how do I fix that? I'm not getting the light at the right angle for contrast ( an you thought lenses provide contrast? lighting provides contrast.), what can I do?" Really, it just goes on and on. No matter how good you have it, you see ways to improve.
The biggest advantage I have over many on the forum, my bird sanctuary is in my back yard and I'm retired. I can go out there every day with decent light. And if the light is good, I'm going to be out there for at least a half hour-45minutes. And that's if no unusual birds have turned up. If there's a bird there that I don't see every day, I'll be out until I either have an image, or the bird has gone.
It took, the constant softness of images like this taken with my Sigma 70-300. The bird is on a completely un-natural store bought porch fixture that just happened to have a small bird feeder hanging on it.
Every nature photographer I've heard or read about, would enjoy their subjects, even if they didn't have a camera.
Probably until I got to this point, I probably wouldn't have benefitted from a better lens. But once I got images like this on a regular basis, it was pretty clear a better lens would improve my images.
These days I wouldn't even keep that image.
This is what I like these days.
Those who watched me on the forum over the years have seen the whole process. So while the DA*200 and TCs was a step in the process, most of the process did not involve buying lenses. And most of it took place over months and years.The Cedar Waxwing shots I posted, I've been trying to get images of that bird for 8 years. I got images with the 70-300 8 years ago and I've always wanted better ones. You can't tell that from the images... and I'm really happy I got the opportunity with good glass, but it took a long time to get to this point. In this case, my wife spotted these birds on her morning run which tends to be about 10 km. Without her "scouting" I wouldn't even have known they were there. It takes a lot more than a lens. It takes luck and perseverance. But if you're up for it, the k-3 DA*200 and a couple TCs is a great combo.
Simple fact, if my wife decides to sleep in and doesn't go for her run, I don't have those images.
Another simple fact, I just love going out sitting in the blind, watching the birdies do bird behaviours. The pictures are a bonus. I often spend an hour or more just finding out what's out there today, before I even start shooting. You have to be a guy who loves doing that kind of stuff, and then you also have to be a guy who will bother taking a camera and figure out how to get the images, which involves feeder placement for the best light angles, setting up so you can get both ground feeders and birds who like feeders up in the air. There are a lot of qualifications for the job.
So buying the TCs will be the easy part.
P.S.
Oh did I mention the $70-$100 a month in bird feed? After year or two you could buy a couple of lenses with that.