Proposed K-3 AF test against the real comparable alternatives

RockvilleBob · 11-12-2013, 02:58 PM - **1 Like**

Here's a test of Auto Focus I would like to see: the Pentax K-3 vs Nikon 7100 vs Canon 70D 7D and why not throw the 55% more expensive Nikon D610 in the mix. All tested with the Sigma 70-200 2.8 lens all tested at RAW and just so the Nikon 7100 doesn't sink to the bottom of the sea you can add JPEG. I understand the Nikon 7100 chokes after a couple of raw shots.
I think the test against the 7100 70D and 7D would show results of comparable cameras and the D610 show what is possible for those who can spend more.
I feel such a test might give us an apples to apples comparison along with a comparison to a higher performance and costly solution.

Adam · 11-12-2013, 03:12 PM

Originally posted by RockvilleBob

Here's a test of Auto Focus I would like to see: the Pentax K-3 vs Nikon 7100 vs Canon 70D 7D and why not throw the 55% more expensive Nikon D610 in the mix. All tested with the Sigma 70-200 2.8 lens all tested at RAW and just so the Nikon 7100 doesn't sink to the bottom of the sea you can add JPEG. I understand the Nikon 7100 chokes after a couple of raw shots.
I think the test against the 7100 70D and 7D would show results of comparable cameras and the D610 show what is possible for those who can spend more.
I feel such a test might give us an apples to apples comparison along with a comparison to a higher performance and costly solution.

I agree! Might be worth having done for the homepage at a later date. I wonder if Canon's going to release a new APS-C body in the mean time? The 7D predates the K-5 and still hasn't seen squat for updates...seems like they really don't care about APS-C users any more.

JinDesu · 11-12-2013, 03:18 PM

I would agree with having a test using the Sigma HSM. Quite a few users are saying that the HSM in their Sigma lenses are performing quite astoundingly in the k-3 as compared to the k-5. While the DA*60-250 is no DA*50-135, it still is supposedly slow vs HSM, USM, and SWM.

**Miguel** · 11-12-2013, 03:24 PM - **1 Like**

Originally posted by RockvilleBob

Here's a test of Auto Focus I would like to see: the Pentax K-3 vs Nikon 7100 vs Canon 70D 7D and why not throw the 55% more expensive Nikon D610 in the mix. All tested with the Sigma 70-200 2.8 lens all tested at RAW and just so the Nikon 7100 doesn't sink to the bottom of the sea you can add JPEG. I understand the Nikon 7100 chokes after a couple of raw shots.
I think the test against the 7100 70D and 7D would show results of comparable cameras and the D610 show what is possible for those who can spend more.
I feel such a test might give us an apples to apples comparison along with a comparison to a higher performance and costly solution.

I have used a Canon 7D for the past four years to shoot sports and birds, while keeping a Pentax K20D and many Limited lenses and then some around for art and studio work. My K-3 just arrived, and I plan on testing it out shooting a couple of soccer matches (or even practices) within days using the Sigma 100-300mm f4 lens and maybe the 1.4x TC. My goal is to replace the 7D and the 100-400mm L f4.5-54.6 lens which perform excellently. I'll also bring the Canon setup for match shooting. My goal is to write up subjective findings here. Stay tuned.

M

RyanS · 11-12-2013, 05:53 PM

Originally posted by Adam

I agree! Might be worth having done for the homepage at a later date. I wonder if Canon's going to release a new APS-C body in the mean time? The 7D predates the K-5 and still hasn't seen squat for updates...seems like they really don't care about APS-C users any more.

Here is a rumor posted today about the 7D Mk II - Canon EOS 7D Mark II in 2014 [CR2]

fyby · 11-13-2013, 06:14 AM

Aka K3 killer....

Seriously, it would be good, to compare cameras with same lenses. At least I can provide you with test of K-3 with DA*300, DA*50-135, Sigma 70-200 II:
First series is with DA*300.
Pentax Friends Site - Galerie, Forum • Zobrazit téma - K3 prvni dojmy
Its in czech language, but anyway, you can look on pictures, theres clear indication, which lens and exposure was used there.

wahid_satu · 11-13-2013, 08:17 AM

Originally posted by fyby

At least I can provide you with test of K-3 with DA*300, DA*50-135, Sigma 70-200 II:
First series is with DA*300.

Thanks.

Looking at the series, it seems that using the sigma 70-200 you get higher keeper rate than with the other lenses. Can you confirm?

ruoyun.huang · 11-13-2013, 11:10 AM

I wonder how good (i.e. fast/accuracy) comparing to 5D markIII

almost jumped to 5d III a few months ago, but decided to wait to see k3 for a bit more time

RyanS · 11-13-2013, 11:30 AM

Originally posted by ruoyun.huang

I wonder how good (i.e. fast/accuracy) comparing to 5D markIII

almost jumped to 5d III a few months ago, but decided to wait to see k3 for a bit more time

$1200 vs $3400...not a fair test

JinDesu · 11-13-2013, 11:33 AM

Originally posted by RyanS

$1200 vs $3400...not a fair test

Having heard that the 5D Mk3's AF isn't amazing, just that it is much better than the 5D Mk2, that sort of comparison may be closer than the price tags imply.

What the 5D Mk3 definitively has over the k-3 is the better video.

11-12-2013, 02:58 PM - 1 Like	#1
RockvilleBob Veteran Member Join Date: Dec 2011 Location: Lewes DE USA Photos: Albums Posts: 1,780	Proposed K-3 AF test against the real comparable alternatives Here's a test of Auto Focus I would like to see: the Pentax K-3 vs Nikon 7100 vs Canon 70D 7D and why not throw the 55% more expensive Nikon D610 in the mix. All tested with the Sigma 70-200 2.8 lens all tested at RAW and just so the Nikon 7100 doesn't sink to the bottom of the sea you can add JPEG. I understand the Nikon 7100 chokes after a couple of raw shots. I think the test against the 7100 70D and 7D would show results of comparable cameras and the D610 show what is possible for those who can spend more. I feel such a test might give us an apples to apples comparison along with a comparison to a higher performance and costly solution.

11-12-2013, 03:12 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Originally posted by RockvilleBob Here's a test of Auto Focus I would like to see: the Pentax K-3 vs Nikon 7100 vs Canon 70D 7D and why not throw the 55% more expensive Nikon D610 in the mix. All tested with the Sigma 70-200 2.8 lens all tested at RAW and just so the Nikon 7100 doesn't sink to the bottom of the sea you can add JPEG. I understand the Nikon 7100 chokes after a couple of raw shots. I think the test against the 7100 70D and 7D would show results of comparable cameras and the D610 show what is possible for those who can spend more. I feel such a test might give us an apples to apples comparison along with a comparison to a higher performance and costly solution. I agree! Might be worth having done for the homepage at a later date. I wonder if Canon's going to release a new APS-C body in the mean time? The 7D predates the K-5 and still hasn't seen squat for updates...seems like they really don't care about APS-C users any more. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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11-12-2013, 03:18 PM	#3
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	I would agree with having a test using the Sigma HSM. Quite a few users are saying that the HSM in their Sigma lenses are performing quite astoundingly in the k-3 as compared to the k-5. While the DA60-250 is no DA50-135, it still is supposedly slow vs HSM, USM, and SWM.

11-12-2013, 03:24 PM - 1 Like	#4
Miguel Site Supporter Join Date: Sep 2007 Location: Near Seattle Photos: Gallery Posts: 2,743	Originally posted by RockvilleBob Here's a test of Auto Focus I would like to see: the Pentax K-3 vs Nikon 7100 vs Canon 70D 7D and why not throw the 55% more expensive Nikon D610 in the mix. All tested with the Sigma 70-200 2.8 lens all tested at RAW and just so the Nikon 7100 doesn't sink to the bottom of the sea you can add JPEG. I understand the Nikon 7100 chokes after a couple of raw shots. I think the test against the 7100 70D and 7D would show results of comparable cameras and the D610 show what is possible for those who can spend more. I feel such a test might give us an apples to apples comparison along with a comparison to a higher performance and costly solution. I have used a Canon 7D for the past four years to shoot sports and birds, while keeping a Pentax K20D and many Limited lenses and then some around for art and studio work. My K-3 just arrived, and I plan on testing it out shooting a couple of soccer matches (or even practices) within days using the Sigma 100-300mm f4 lens and maybe the 1.4x TC. My goal is to replace the 7D and the 100-400mm L f4.5-54.6 lens which perform excellently. I'll also bring the Canon setup for match shooting. My goal is to write up subjective findings here. Stay tuned. M

11-12-2013, 05:53 PM	#5
RyanS Senior Member Join Date: Jun 2013 Location: San Antonio, TX Photos: Gallery Posts: 139	Originally posted by Adam I agree! Might be worth having done for the homepage at a later date. I wonder if Canon's going to release a new APS-C body in the mean time? The 7D predates the K-5 and still hasn't seen squat for updates...seems like they really don't care about APS-C users any more. Here is a rumor posted today about the 7D Mk II - Canon EOS 7D Mark II in 2014 [CR2]

11-13-2013, 06:14 AM	#6
fyby Junior Member Join Date: Aug 2013 Photos: Gallery Posts: 46	Aka K3 killer.... Seriously, it would be good, to compare cameras with same lenses. At least I can provide you with test of K-3 with DA300, DA50-135, Sigma 70-200 II: First series is with DA*300. Pentax Friends Site - Galerie, Forum • Zobrazit téma - K3 prvni dojmy Its in czech language, but anyway, you can look on pictures, theres clear indication, which lens and exposure was used there.

11-13-2013, 08:17 AM	#7
wahid_satu Forum Member Join Date: Oct 2010 Location: Jakarta Photos: Gallery Posts: 96	Originally posted by fyby At least I can provide you with test of K-3 with DA300, DA50-135, Sigma 70-200 II: First series is with DA*300. Thanks. Looking at the series, it seems that using the sigma 70-200 you get higher keeper rate than with the other lenses. Can you confirm?

11-13-2013, 11:10 AM	#8
ruoyun.huang Forum Member Join Date: Dec 2008 Location: Seattle, WA Posts: 64	I wonder how good (i.e. fast/accuracy) comparing to 5D markIII almost jumped to 5d III a few months ago, but decided to wait to see k3 for a bit more time

11-13-2013, 11:30 AM	#9
RyanS Senior Member Join Date: Jun 2013 Location: San Antonio, TX Photos: Gallery Posts: 139	Originally posted by ruoyun.huang I wonder how good (i.e. fast/accuracy) comparing to 5D markIII almost jumped to 5d III a few months ago, but decided to wait to see k3 for a bit more time $1200 vs $3400...not a fair test

11-13-2013, 11:33 AM	#10
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	Originally posted by RyanS $1200 vs $3400...not a fair test Having heard that the 5D Mk3's AF isn't amazing, just that it is much better than the 5D Mk2, that sort of comparison may be closer than the price tags imply. What the 5D Mk3 definitively has over the k-3 is the better video.