Originally posted by Pioneer In your case the FA 135mm 2.8 is a really good option and would probably work for the majority of your shots. Using primes for sports is a bit of a change in mindset but I find it works really well.
If you can learn to anticipate, Vivitar made a terrific 70-210mm f3.5 Series One zoom that would be perfect for your application but, no auto focus. I work with both manual and auto focus but I find auto focus to be far more frustrating as it will frequently go into focusing spasms where nothing is in focus. Of course that usually happens in the heat of the moment when a group of kids are in a smaller group. Even when I'm using an autofocus lens I frequently shut it off to prevent that kind of thing. I will occasionally miss the unexpected shot with my manual focus lenses, or when my autofocus is shut off, but it doesn't actually happen too often.
But, you are certainly right. If you want a good, 2.8 zoom with auto focus, you will have to spend some money. For sports the 70-210mm f2.8 is a terrific option, but these lenses are much bigger than what you have been working with. IMO, the Sigma is a great option in this area.
Perhaps I should pick up an old manual focus telephoto prime and just mess around with it and see what I can do. Heck, I even have a screwmount adapter if I really want to go old!
I have a feeling I'll really prefer the autofocus, though. Especially since my girlfriend and Dad often shoot using my camera as well. I would say at this point in time I'm MUCH more technically knowledgable and skilled than them, but they know their way around a camera and what the different things mean.
Which Sigma are you speaking of in particular? The 70mm 2.8 Macro may be good, but does it have a limiter to keep focusing from hunting too far? I suppose that one also doesn't have HSM.
Their 105mm is 2.8, macro, and has HSM, but once that $200 rebate goes away that's one pricey lens and I'm probably not buying anything until a few more checks come in...
I've always been interested in their 17-50 (Now they have an 18-50 as well?) so that may be considered... Time to look in the review section at all of those lenses
Originally posted by luftfluss Long Macro lenses generally have slow AF.
The Sigma 70-200/2.8 is reportedly pretty quick.
Definitely know what you mean, there. There is just so much room for it to hunt. But it doesn't help that my camera is getting a touch outdated as far as focus speed, none of my lenses are SDM/HSM, and I'm not terribly great at MF.
Macros are necessarily necessary here, sure, it would be nice to have, but not a necessity, especially if I can drop AF times.
Originally posted by eddie1960 with WR in this class the only zoom is the DA* 50-135. or given the US price increases the not as fast the 60-250 (which really should be an ideal sport lens, constant f4 and HSM - and though it is marketed as DA the Patents show it as FF compatible) - if you move up to a K7 or K30 (both of which will provide faster focus) the f4 versus f2.8 isn't a big deal
the DFA100 WR is the budget high quality fast (ish) option
for what the first 2 lenses will cost now days (even used) you could probably get a K30/used K5 and a 50-200wr and the better high iso will reduce the issue of needing a fast lens
I'm sad the 50-135 has gotten so spendy. It seems like such a solid lens and something that so many people could use, but they price it so high... I'm seeing the 60-250 as even more expensive yet. I want to wait for the K30 for upgrading. Perhaps even waiting for it to hit the used marketplace here, but it would definitely be a big step up for me! Remember, the K20D doesn't even shoot any video. So I'd gain quite a few new features.
Is the D FA 100 better than the old Tamron 90mm macro lens that has basically been seen as the standard? Certainly the WR would be a nice addition, the weather here in Minnesota is brutal
Originally posted by pghwarrior23 You won't get the WR but consider Sigma for some cheaper options and still get the speed. I think the DA 16-45 f/4 is a nice lens and relatively fast. Of course even better on the K-5 because you can crank the ISO up higher. The DA* lenses are of course fantastic but also pricey. The 40mm f/2.8 pancake is an AWESOME little lens, but have to be willing to zoom with your feet. The Sigma 70-200 f/2.8 is nicely priced but a REALLY heavy lens. Personally my absolute favorite lens is the DA* 50-135 f/2.8. Awesome focal length, relatively light weight, good size, well built, fast, and SHARP!
The 40mm f/2.8 LTD is currently my favorite lens, but I'm hoping for something with a bit more reach. I love how quickly it focuses, though. And man is it sharp...
Perhaps if I got the 50-135, I would be spending more, sure, but I would be getting a lens I could leave on my camera for a great number of situations. Is it usable at all indoors? 50 seems just a touch to intimate for most indoors other than mugshot portraits but I'll rely on your knowledge on that, as you are an owner and I'm a prospect.
Originally posted by pghwarrior23 You can also go to cameralensrentals.com and rent Pentax gear to try something out before you buy to see if it fits your needs.
Great, I'll be sure to check that site out!