Originally posted by jnoelle Now I understand that this is NOT an unbiased place to ask this question, but should I invest in the pentax line? I have a kit lens for my k10d, I'm ready to move on to bigger and better lenses, and I want to make sure I'm buying into the right line of camera's for what I want, as everyone is all "nikon, canon, nikon, canon" all the time. I'm looking to go into portrait/wedding photography. I want to have the option to set up nice external flash systems, I don't plan on doing much studio work but I would like to have the option, ....
This is a hard one to answer.
The biggest strength of the Pentax system right now is price. A new K20D and a couple of terrific lenses will cost you a lot less than, say, a new Nikon D300 and a couple of comparable quality lenses. The Pentax system does not take better photos - but it doesn't take worse photos, either. The K20D is a terrific camera by almost any measure, and it's a pleasure to use. But if you can't take a great photo with a Nikon D300, you won't be able to take a great photo with a K20D, either.
Niche brand disadvantages
It is true that the number of pros using Pentax is small. Not surprising, as the number of photographers of any type - pro or amateur - using Pentax systems is small. May be more Pentax wedding photographers than Olympus or Sony, but I'm not sure. Anyway, the fact that Pentax is a niche brand does matter. I think it will matter to a few of your potential clients. Brand recognition matters to some people. But the more important fact is that Nikon and Canon are supported by just about every camera store or Walmart camera department in the universe. This can make a difference. It's easier to rent a lens and/or a body for Nikon. Half of the articles you read in magazines assume you've got a Canon or Nikon (just as they assume you're using Photoshop) so a lot of good info is addressed specifically to users of those camera systems. And it is wearing to have to deal with other pro photographers who, in their ignorance, think that anybody who doesn't have a Nikon or Canon can't be serious.
Flash
You mentioned flash - and if you're interested in wedding work, then it's very important that you understand that flash photography is going to be really important to you, not just for formals but also for candids that require flash. And here's the thing: flash is NOT a strength of the Pentax system, indeed, I think it may be the system's biggest weakness. If I were starting over again, but could keep all the knowledge and experience I've gained in the last couple of years, I'd probably start with Nikon instead of Pentax, not because the cameras are better, but because the flash system seems to be better. You might want to do some research into that topic before you spend thousands of dollars.
I have had a LOT of problems with the Pentax flash units I've got - two 540's. Both have broken on me. Exposure is iffy. The p-ttl pre-flash causes about 10% of my subjects to blink or close their eyes. One bride had this problem badly. You can get the Pentax 540 to work and produce pretty good results but you're definitely going to want to own a couple of 'em and you're going to want to practice a lot until you really feel comfortable. I am about to add a Metz unit to my arsenal and I'm hoping that the Metz is more reliable and also that the exposures I get with the Metz will be better.
Lenses
Back to Pentax and the matter of lenses. The Pentax primes are great lenses, although I don't believe they're any better then the Zeiss primes. The Zeiss lenses cost more, but on the other hand they are available for other mounts besides Pentax.
But primes schmimes - you're going to use zooms to shoot weddings, mostly. The problem here is that we Pentax users don't have as many really good fast zoom lenses to choose from as Nikon or Canon photographers have. Fortunately, there are soom good lenses available to us. The K20D does quite well in low light such as you'll encounter in churches during ceremonies but you will still want fast, good lenses. For wedding work you'll want to have the Pentax DA* 50-135 f/2.8 and perhaps the DA* 16-50 f/2.8. Those two lenses might be all you need. I shoot with two bodies, with the 50-135 on the K20D and a Sigma 18-50 f/2.8 or Pentax 16-45 f/4 on the other body (the K10D) and that's just about all I need. I take a Sigma 10-20 with me to a wide shot of the church and possibly of the reception venue but that's about all. I seldom feel the need to go beyond 135mm. Something like a 50-200 f/2.8 would be nice if it really were as good as the Pentax 50-135 but I don't feel the need for it. One of our forum members said once here that he felt he could shoot an entire wedding with nothing but the Tamron 28-75 f/2.8, and I think that's true. If I had to have just one lens and one body, the K20D + Tamron 28-75 would cover just about everything, not without some problems but it would be doable. The thing is, though, that you simply cannot think about shooting a wedding without at least two bodies available. Everything breaks.
The camera as a hammer
If you're going to go pro, it really helps NOT to be romantic or sentimental about hardware. I am not a "Pentaxian." I'd switch to something else tomorrow if I could afford to and thought it better. Indeed, I wish I had the money to own a number of different cameras, because then I could use different cameras for different purposes and always have the best tool for the job. However, I will say that, while I envy Nikon photographers their excellent flash system in particular, I am very fond of the way the Pentax K10D/K20D handles. I'm a biggish guy - 6' 2", with biggish hands. To me personally, the K20D + grip feels perfectly balanced, everything is right where I want it. I've never enjoyed shooting with a camera more than I enjoy shooting with the K20D. I could bang in the nails well with any hammer, but I really like the feel of the K20D. That's important. How do you know what's best for YOU? Ideally you get out and get your hands on different cameras, if only for a few minutes in a store. Unfortunately, Pentax's awful distribution system makes it hard to do this, because it's so hard to find a retail store where you can actually hold or shoot with a Pentax K20D. (See observations above about niche brand disadvantages.)
Bottom line
The bottom line is that the Pentax bodies and Pentax-mount lenses provide everything you need to do great wedding work. And the system will initially be cheaper. The disadvantage of the Pentax system is going to be in the flash units you have to choose from and in the problems with the P-TTL technology. Consider getting a couple Metz units instead of the Pentax 540. I think I'm going to buy a Metz very soon and I'll be sure to post some thoughts about it. NOTE that I'm talking only about using the Pentax 540 FGZ unit itself. You have with Pentax all the other options you'd have with Nikon or Canon: ability to use radio transmitters, etc.
If money's no object, get a Nikon D3 or wait for the D700 or for Canon's next full-frame camera. If money matters (and it matters to nearly every pro - it's the rich amateurs who don't care about the cost) then the Pentax K20D itself is a great camera and a good platform for wedding and portrait work - if you're willing to put up with some of the problems I've mentioned above.
Good luck,
Will