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11-02-2009, 07:33 AM   #1
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fast zoom lens query

k100D, looking for "fast lens" with high zoom, low fstop but with high zoom, for highschool sports shots. any recommendations? is there anything available for my k100d, or do i need a different camera body or make? help appreciated, thanks

11-02-2009, 07:44 AM   #2
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There would be several options, depending on what focal length you want to go with. The DA*50-135 can be used as a screw driven lens. The Tamron 70-200 f2.8 is also screw driven. The newer Sigma 70-200 is HSM which wouldn't be compatible, if you could find an older version of that, you could use that as well. I think any one of those lense would work well, just really depends on whether the wide end is more important to you, or the long end.
11-02-2009, 09:33 AM   #3
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hi rondec, so i am mostly a novice, can you explain "screw driven", HSM, and what you mean by "wide end or long end"? sorry, and thanks for your patience! zoom, low light in hockey rinks, action/sports, and i am told fast lens. i was also told that the k100d is likely too slow of a camera body to allow anything adequate to be photographed....?
11-02-2009, 09:41 AM   #4
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note that screw drive means the camera body motor drives the focusing HSM implies the focusing motor is in the lens.

Depending on body, you can;t use HSM lenses.

K10D K100Dsuper and later cameras can use HSM lenses,

all *istDXX bodies plus K100D and K110D can not use HSM lenses because they lack the KAF2 mount, with power contacts for the HSM lenses.

You indicate you have a K100D so you can't use HSM lenses

As for the K100 being too slow for sports that is pure BS. I have used my *istD without any issue.

11-02-2009, 09:49 AM   #5
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Your focal length needs may vary depending on the sport and the venue. I like 70-200mm for outdoor field sports but a 50-135mm might be better suited for basketball (if you're shooting close to the sidelines as I usually am.)
11-02-2009, 09:58 AM   #6
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icecream it sounds from your posts like you might be misusing the term "zoom". A zoom lens is just one that goes from one focal length to another...not necessarily one that is "long". For example, the Pentax DA 10-17mm is a zoom lens, but it only zooms from really wide to ridiculously wide.

A zoom lens is the opposite of a "prime" lens, which is a lens that only has one focal length. That is, with a prime lens you can't zoom in or out, and the only way to magnify the subject is to walk closer to it.

Both zooms and primes can be wide (short focal length), normal ( in the middle), or telephoto (long focal length). Zooms can also cover all these ranges at once, like a DA 18-250mm superzoom, which goes from a fairly wide 18mm to a very close-up 250mm.

Based on your needs, it sounds to me like you're really saying you want a long lens. And while a prime lens like a 200mm might do the trick, you probably do, in fact, want a telephoto zoom.

What's your budget? That will largely determine what combination of "fast" and "long" you can afford. How do you feel about manual focus?
11-02-2009, 10:04 AM   #7
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I second what Dadipentak recommended. I've used the 50-135 indoors mainly for swim meets, but for outdoor soccer the Tamron 70-200/2.8 works very well. That focal length seems just about right. But definitely if you're indoors you will need the "speed" of a 2.8. Now as far as focussing speed, from my experience the Tamron is the quicker of the two.
11-02-2009, 11:13 AM   #8
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this is all extremely helpful! and you all figured out my misnomers perfectly. yes, i need a zoom (not a prime) but with telephoto, up to 200 sounds right, and 2.8 yes. and glad to hear that was bs i was told by someone trying to get me into a canon......

next, would prefer auto focus -- what are my options? say i was in the 700 to 1200$ range. is there anything? again, greatly! appreciated.

11-02-2009, 11:20 AM   #9
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QuoteOriginally posted by icecream Quote
this is all extremely helpful! and you all figured out my misnomers perfectly. yes, i need a zoom (not a prime) but with telephoto, up to 200 sounds right, and 2.8 yes. and glad to hear that was bs i was told by someone trying to get me into a canon......

next, would prefer auto focus -- what are my options? say i was in the 700 to 1200$ range. is there anything? again, greatly! appreciated.
Amazon has the Tamron 70 200 f/2.8 for $701.59, free shipping. Seems like a good deal.
11-02-2009, 11:23 AM   #10
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I don't have it, but the Tamron 70-200 seems to be a pretty nice lens. Here is a flickr group of users of this lens, browse through their photos and see what you think. I believe this lens is in the $700 range new at B&H and Adorama, so it's in your price range.

Flickr group: Flickr: The Tamron 70-200 f2.8 Pool
11-02-2009, 02:45 PM   #11
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You might look for a Soligor 200mm 2.8. They appear every once in a while for around $100. I bought a minolta mount version and changed it to a Kmount (I used a $10 flange type m42 adapter to replace the MD bayonet.))

There's a Canon FD mount version at B&H now but that might be more difficult to convert to K mount.

Dave in Iowa
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