Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-18-2013, 04:15 PM - 2 Likes   #1
Site Supporter




Join Date: Jan 2013
Location: Texas
Photos: Gallery
Posts: 79
K-3 DA* 60-250 AF Tracking Sample Shot Sequence Sports for your analysis

Hello, I am new posting to the forum, although I have been enjoying reading.

I read some threads discussing K-3 AF Tracking,

I am not a pro, just enjoy photography as hobby

Here is a sequence of shots i took for your K-3 AF tracking analysis. How do you think the K-3 DA*60-250 combo did on this case?

You can see the pics here (i hope i did this ok for you all to see):


K3 DA* 60-250 AF Tracking - a set on Flickr



Event = F1 2013 US Grand Prix (cars running at over 200 Km/hr. )

Camera was set with recommend settings as per K-3 in-depth review on this forum.
Additional settings:
Exposure mode = P
Program LIne = Sports icon
AF-C
Focus Priority
SEL-L (Select center point and have expanded zone of 27 points)
RAW
High - Continuous Shooting.

Method: I focused on road near were car is going to show up, then as soon as car shows focus I focus again with center point on car itself, then shot non-stop following the car until is gone. I did not have any problem of AF speed with this lens in this case (i do not know about other sports yet, I will try soccer on the weekend). Buffer and shots per second on this camera is great, i was able to shot all the sequence non-stop in RAW.

11-18-2013, 04:34 PM   #2
Veteran Member




Join Date: Jan 2009
Location: Edmonton, Alberta Canada
Posts: 555
Hi Rudy:

Looks quite good to me. The DA 60-250 is not a fast focussing lens so you did well.

Dale
11-18-2013, 05:40 PM   #3
Senior Member




Join Date: Jul 2013
Posts: 161
are these all the shots in this sequence? or you just posted the keepers? (of that sequence)
I just wanted to cross check with the 67% keeper rate in the PF K-3's review. Results here
11-18-2013, 06:25 PM   #4
Site Supporter




Join Date: Jan 2013
Location: Texas
Photos: Gallery
Posts: 79
Original Poster
QuoteOriginally posted by jrcastillo Quote
are these all the shots in this sequence? or you just posted the keepers? (of that sequence)
I just wanted to cross check with the 67% keeper rate in the PF K-3's review. Results here
These are the shots in that sequence, nothing removed or added, only converted from raw to JPEG and uploaded.

11-18-2013, 07:35 PM   #5
Pentaxian




Join Date: Sep 2011
Location: Nelson B.C.
Posts: 3,247
Very nice. It kept focus even if it wasn't centered in the view. Where I have seen issues is when the focus is closer in; for example standing at the side of the road with a car coming towards you, passing and then going away. Closer in with a longer lens the dof is narrower and the focus throw is larger. It may be a factor of the lens focusing speed.
11-18-2013, 08:18 PM   #6
Site Supporter




Join Date: Jan 2013
Location: Texas
Photos: Gallery
Posts: 79
Original Poster
QuoteOriginally posted by derekkite Quote
Very nice. It kept focus even if it wasn't centered in the view. Where I have seen issues is when the focus is closer in; for example standing at the side of the road with a car coming towards you, passing and then going away. Closer in with a longer lens the dof is narrower and the focus throw is larger. It may be a factor of the lens focusing speed.
I understand the case you describe. In this case there was little of bit of that too, but not as extreme as in the case you describe.

In this case, this section of the track is a winding road. The first 2 or 3 shots the car is kind of coming towards the lens. Then the road goes left, the distance between the car and lens increases, then turns right so the distance between car and lens decreases, then again the distance to the car will increase as the road opens to the left again before the final right to get out of this section.
11-18-2013, 08:35 PM   #7
Junior Member




Join Date: Oct 2013
Location: Arizona
Posts: 36
Was that the F1 race in Texas? I was watching it on Tv yesterday and I said man If I had my K-3 I would get some fantastic shots of that race. great set of pics love the colors great job!!!!!
11-18-2013, 09:07 PM   #8
Site Supporter




Join Date: Jan 2013
Location: Texas
Photos: Gallery
Posts: 79
Original Poster
QuoteOriginally posted by Chicomalo Quote
Was that the F1 race in Texas? I was watching it on Tv yesterday and I said man If I had my K-3 I would get some fantastic shots of that race. great set of pics love the colors great job!!!!!
Yes, F1 US 2013 Grand Prix, Austin Texas. Thank you.

11-18-2013, 10:09 PM   #9
Pentaxian




Join Date: Sep 2011
Location: Nelson B.C.
Posts: 3,247
QuoteOriginally posted by Rudy Quote
I understand the case you describe. In this case there was little of bit of that too, but not as extreme as in the case you describe.

In this case, this section of the track is a winding road. The first 2 or 3 shots the car is kind of coming towards the lens. Then the road goes left, the distance between the car and lens increases, then turns right so the distance between car and lens decreases, then again the distance to the car will increase as the road opens to the left again before the final right to get out of this section.
I'm not discounting the accomplishment at all. The speeds of these cars is very high, and it would be a challenge to pan successfully. It seems the body/lens combination did what you asked it to do. I suppose I'm interested in finding the limits of the K-3. It would be a worthy test to see how close to the track you could be before it starts losing focus. It may be that the skill of the operator may be the limitation; it is a real challenge to acquire focus and pan to follow a fast moving subject across 160 degrees field of view. If it is in fact the skill of the operator that is the limiting factor, great.
11-19-2013, 03:04 AM   #10
Pentaxian
RonHendriks1966's Avatar

Join Date: Jan 2009
Photos: Gallery
Posts: 8,714
QuoteOriginally posted by Rudy Quote
These are the shots in that sequence, nothing removed or added, only converted from raw to JPEG and uploaded.
Any idea what framerate you get with the AF-C?

The K-5 was about 2,8 fps with AF-C and a changing scene like this.
11-19-2013, 06:20 AM   #11
Site Supporter
andre-mz5's Avatar

Join Date: Jul 2009
Location: Eindhoven
Photos: Gallery
Posts: 268
Looking at the exif info the first frame was shot at 13:28:20 and the last at 13:28.25. The total number of frames in the sequence is 24, so the math would result in a framerate of 24/5= 4.8 fps.

Last edited by andre-mz5; 11-19-2013 at 06:22 AM. Reason: typo
11-19-2013, 06:35 AM   #12
Site Supporter




Join Date: Jan 2013
Location: Texas
Photos: Gallery
Posts: 79
Original Poster
QuoteOriginally posted by andre-mz5 Quote
Looking at the exif info the first frame was shot at 13:28:20 and the last at 13:28.25. The total number of frames in the sequence is 24, so the math would result in a framerate of 24/5= 4.8 fps.
Yes, 4.8.fps in RAW , thank you for doing the calculation.
11-21-2013, 08:15 PM   #13
Veteran Member




Join Date: Jan 2009
Location: Brisbane
Photos: Gallery
Posts: 1,421
Good sequence, AF tracked nicely

Shame its Vettel and not Webber though
11-21-2013, 09:55 PM   #14
Site Supporter




Join Date: Jan 2013
Location: Texas
Photos: Gallery
Posts: 79
Original Poster
QuoteOriginally posted by jezza323 Quote
Good sequence, AF tracked nicely

Shame its Vettel and not Webber though
OK, here is one of Webber

Webber | Flickr - Photo Sharing!
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
af, af tracking, car, da*60-250, dslr, focus, k-3, k-3 da*, k3, pentax k-3, sample shot sequence, sequence, shot, sports, sports action
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sigma 75-200 f3.8 AF - poor mans DA* 60-250 dankoBanana Pentax SLR Lens Discussion 11 10-03-2013 05:40 AM
For Sale - Sold: Free *Boxes* for K-5, DA* 16-50, DA* 60-250 Heie Sold Items 9 06-03-2013 05:09 AM
DA* 60-250 owners: How do you carry your 60-250 at the ready? apisto Pentax SLR Lens Discussion 23 03-13-2013 05:42 AM
Cheap Counter Balance Weight for K-5 when using DA* 60-250 Whitewind Pentax Camera and Field Accessories 17 11-01-2012 11:45 AM
60-250/4 vs. a 70-200/2.8 for portraits/sports kenyee Pentax SLR Lens Discussion 3 11-26-2009 06:55 PM



All times are GMT -7. The time now is 02:53 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top