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09-19-2013, 08:49 AM   #1
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Use da 70mm 2.4 and crop or buy zoom?

Two questions really - first for shooting indoor sports would my da 70mm 2.4 prime lens photos be as good as a larger zoom if I crop them?

Second question - looking to upgrade my k200d to either k-5 or k-5 IIs. Which is better? Is it worth price difference?

09-19-2013, 09:54 AM   #2
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The problem with zoom lenses is that they rarely go faster than f4 above 70mm. Some go f2.8, but even that is not as bright as the 70mm f2.4. A constant-aperture zoom lens that has a bright f-stop at the tele length might be expensive. Maybe a 135mm prime lens would be a better choice? The thing with cropping is that it can be really great, but it kind of depends on the camera. Some cameras have too much noise or too little MP for significant cropping.

K-5 vs. K-5IIs.. well, there are a couple threads with differences. The K-5II and IIs have an improved AF module, especially for low light. So this might be important to you. And the II vs. IIs.. the II is regular, the IIs is a little sharper due to lack of AA filter.
09-19-2013, 10:01 AM   #3
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Well that depends on how zoomed you want to get vs your 70mm. I crop all the time with my Sigma 50 F1.4, sometimes from 12MP (my k-x) down to 1MP sometimes (4288x2848 to 1200x800). I think that's pretty much a 3.5x ratio.
09-19-2013, 10:08 AM   #4
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Let's start with what you want to print/view. What size specifically.

2MPimage can print 4 x 6 easily and 8" x 10" if you don't inspect with a magnifier especially if you upscale with linear interpolation

How much do you want to crop?

Are you going to shoot wide open or stop down?

How much light.

Also a newer body like the K5 has far superior high ISO, but i shot lots of indoor stuff with my *istD so you can do it, just expect grain.

The best option is likely a 70-200/2.8 but be prepared to pay

09-19-2013, 10:11 AM   #5
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The FA135 has very fast focusing and is ideal for sports. It's great in combination with the faster focusing of the K-5 IIs. You'll notice a significant difference over your K200D.
09-19-2013, 10:35 AM   #6
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Typically crop nearly half image out - print no larger than 11 x 14.
09-19-2013, 10:35 AM   #7
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The "traditional" sports lens is a 70-200/2.8 (or 70-210/2.8 or 80-200/2.8 or 80-210/2.8).

The Tamron and Sigma versions both have a pretty decent reputation.

The DA* 50-135/2.8 might be worth a mention, but it doesn't have quite the same reach.

If you're on a lower budget, the DA 55-300 is probably a good choice for reach, but you'll miss that wide aperture...

A K-5/K-5II/K-5IIs (or even a K-30/K-50) will be a HUGE step up from your K200d.

According to DxO ratings, the K-5 IIs is 30% better image quality and 1.1 f-stops better in low light. It also has higher dynamic range, shoots faster, etc, etc, etc. Those are vs. K200d. As far as K-5 vs K-5 ii/iis, I think that depends on the price difference. I haven't personally used either camera, but most specs are very similar.
09-19-2013, 11:00 AM   #8
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If you aren't using a tripod the DA70 will definitely give steadier images due to its size, and images are very good wide open when speed is vital. As to cropping, it works for me but I don't crop deeply nor do I make large prints, so that one is user-dependent.

09-19-2013, 12:38 PM   #9
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Note that focal lenght not only affect the angle of view you capture, it also (actually mainly) affects perspective,
09-19-2013, 12:45 PM   #10
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QuoteOriginally posted by VisualDarkness Quote
Note that focal lenght not only affect the angle of view you capture, it also (actually mainly) affects perspective,
No that's wrong. Shooting distance changes perspective, not focal length, the reason you think focal length impacts perspective is that you move closer with shorter lenses to get magnification.

Lets get it right
09-19-2013, 12:53 PM   #11
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QuoteOriginally posted by Lowell Goudge Quote
No that's wrong. Shooting distance changes perspective, not focal length, the reason you think focal length impacts perspective is that you move closer with shorter lenses to get magnification.

Lets get it right
Yeah, you're correct, I really described it incorrectly. I wanted to say that you need to be able to crop with enough quality left to end up with a similar image, hench the difference in practical use. I have an exam in my head right now.
09-19-2013, 02:16 PM   #12
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QuoteOriginally posted by thornburg Quote
The "traditional" sports lens is a 70-200/2.8 (or 70-210/2.8 or 80-200/2.8 or 80-210/2.8).

The Tamron and Sigma versions both have a pretty decent reputation.

The DA* 50-135/2.8 might be worth a mention, but it doesn't have quite the same reach.

If you're on a lower budget, the DA 55-300 is probably a good choice for reach, but you'll miss that wide aperture...
As I implied earlier, I use screw-drive primes for sports, because of their fast focusing. I was never able to get very good information on how fast the DA70 focuses for sports, and I'd really like to know. But it's largely irrelevant for me, since I use the FA*85 (which focuses nice and quickly) instead. Nevertheless, I'm commonly using apertures at f/2.4 or above (for sports, at least) on the FA*85, so the DA70 could be a good value if it focuses quickly.

The DA55-300 has only average IQ (although it's very good for the price), but may work for some sports. I don't remember mine focusing particularly quickly, though.


The DA*50-135 focuses fast enough for some sports, but not for others (e.g. too slow when an athlete is running toward you at full speed, but terrific for shooting a parade and OK when movement is mostly in other directions). If you can get focus it has great IQ, of course.

The Sigma 70-200/2.8 (current model only - Sigma 70-200mm f/2.8 EX DG APO OS HSM for Pentax 589109 B&H) is the only zoom lens that's consistently regarded as fast focusing on the K-5 sports thread here, so if you like the optical quality of this Sigma (and it fits your budget) it's easily your safest bet in a zoom.


The K200D is a great camera (I still use mine), so you might even try buying the lens first. Although I don't get quite as many shots in focus with it, I still get very many nice ones when I use a good lens.

Last edited by DSims; 09-19-2013 at 02:22 PM.
09-19-2013, 02:40 PM   #13
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It's not only the newest Sigma 70-200 that is really fast, older ones like my 70-200/2.8 HSM II Macro are probably just as fast.
09-19-2013, 09:45 PM - 1 Like   #14
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I upgraded my K200D (which I handed down to my daughter) to a K-5ii. Holy chit is the upgrade worth it! The indoor, upgraded ISO performance of the K-5ii is fantastic.
09-19-2013, 10:24 PM   #15
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Depending on the location, your 70/2.4 may be perfectly fine. How close to the action are you? At the 2 high schools closest to me, I use a DA 40/2.8 Limited and get by fine. The bleachers go quite close to the playing floor at basketball games and I need to pay attention when I'm using the camera as the players and the ball can get real close. Larger venues where the seating is further away, longer lenses would be better.
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