Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-21-2015, 09:42 AM   #31
Site Supporter
enoeske's Avatar

Join Date: Jul 2009
Location: Surprise, Az
Photos: Gallery
Posts: 1,888
Just an anecdote -- My AF-C is still pretty abysmal with my K-3. I shot a wedding over the weekend. At the end of the ceremony, the wedding party walked back down the aisle. I was using my 85mm f/1.4 at around f/2.8. K-3 had AF-C, expanded SEL2? (movable 9 points), hold off, and was in Av mode. The sun was still quite high and the light was very bright.

I shot off about 6 shots per couple as they walked down the aisle. Of those, only 1 was sharp.

However, my AF-S works absolutely great. In the darkness of the reception, dance floor with flashing lights -- my focus is almost always perfect. Exposure is great.

07-21-2015, 09:49 AM   #32
Pentaxian




Join Date: Feb 2010
Photos: Albums
Posts: 1,243
QuoteOriginally posted by enoeske Quote
The sun was still quite high and the light was very bright.

I shot off about 6 shots per couple as they walked down the aisle. Of those, only 1 was sharp.
As my K7 could do better than this perhaps it's not entirely the fault of the K3
07-21-2015, 09:54 AM   #33
Pentaxian
starbase218's Avatar

Join Date: Sep 2009
Location: Groningen, The Netherlands
Posts: 1,022
QuoteOriginally posted by fwbigd Quote
I shoot aircraft taking off and lading on occasion with a DA*300mm lens with a DX 1.4x converter, and continually fire of 19 frame burst at 8.3fps and get tack 19 sharp pictures. The focusing system in the K3 works just fine when set to continues high speed shooting.
I think the difference is that these aircraft are so far away that the camera doesn't need to adjust focus by very much very quickly. I took photos on airshows too, primarily with my K-5 and 55-300 which I used back then. Most of the time it was fine, and I'm talking about display teams such as the Red Arrows (I was at Farnborough). And the K-5 doesn't even have AF tracking. I think I just choose a single AF point and tried to keep the aircraft at that position in the frame, with the camera set to AF-C and hi-speed continuous. The only problem I had was when I didn't manage to keep the subject near that AF point.
07-21-2015, 10:22 AM   #34
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,145
I remember the Vulcan from an Abbotsford international show many years ago. The pilot was in deep doo-doo after the show for flying her like a fighter. VERY impressive when he stood her on her tail and went straight up (at high volume!). Running without anything in the bay, she was pretty light on her feet for something with the acreage of a football pitch!

07-21-2015, 11:01 AM   #35
Site Supporter
enoeske's Avatar

Join Date: Jul 2009
Location: Surprise, Az
Photos: Gallery
Posts: 1,888
QuoteOriginally posted by mohb Quote
As my K7 could do better than this perhaps it's not entirely the fault of the K3
highly possible -- I'm not sure how much more I can do other than set up the camera as I did, place the focus zone on the subject and hold the AF button down. The rest is kinda out of my hands.
07-21-2015, 11:38 AM   #36
Senior Member
GoldenRGuy's Avatar

Join Date: Dec 2010
Location: Kingston, Ontario
Photos: Albums
Posts: 154
Original Poster
QuoteOriginally posted by Fauxton Quote
I have a K5 and a K3. I've used other brands (Nikon). I recently photographed hummingbirds using continuous auto focus with 27 points. On a Pentax 55-300 HD WR zoom at 300mm (f5.8, 1/1600); admittedly not the worlds fastest lens. The camera tracked fast enough that the hummingbird was in focus. And they move quick and abruptly. 8 fps whether the bird was moving back, forward, left or right. Bang, bang - all in focus. I figure if the K3 and the 55-300 can do that it can get slower birds too. A faster lens motor wise may make the tracking even faster but empirically I find its already quite capable. I do not use SR when using the continuous af. I don't use SR at any time unless I feel I need it. Now that all said, I'm not a sports or bird photographer, and my better lenses are all under 100mm. But when I want to track something moving fairly quick the camera does perform. For me. As they say YMMV.
I assume you were using a tripod? These are exactly the types of shots I want to get. I don't do events or racing, but birds, dogs jumping off the dock shouldn't be too much to ask of a camera. I'll try using the 27 points. I've been using the centre spot setting perhaps in error if the target is moving and I'm not panning.
07-21-2015, 12:44 PM - 1 Like   #37
Loyal Site Supporter




Join Date: Sep 2006
Location: Texas
Photos: Gallery | Albums
Posts: 23,775
I've have only recently ever used AF-C. On my K5IIs it worked perfectly, getting me a fast group of shots with plenty in perfect focus to pick from. I was shooting a fast and jittery moving Jay bird and it was plenty adequate for what I was hoping for.

They move fast and are very jittery!


I admit I am not much of a fast action shooter, and my experience was brief and maybe not typical, but I was very pleased to have a choice of shots to choose from with the results. That's my two cents...for what it's worth?

Can't let this go by without letting a damn squirrel in here, it is what I mostly shoot and you don't often need a fast lens or AF system for these lazy squirrels.

Peanut butter on a branch might cause a little action, but not much else will....


Most often you have time to do an oil painting.....


Overall, Pentax makes some pretty neat cameras, I am happy to own one and was happy with all the past models too. Sure, there are others with nice features, but every time I compare, Pentax seems to have the most of the best....and at a better price too!
Regards!
07-21-2015, 01:21 PM   #38
Pentaxian
aleonx3's Avatar

Join Date: Jul 2007
Location: Brampton, Ontario
Photos: Gallery | Albums
Posts: 3,873
QuoteOriginally posted by enoeske Quote
highly possible -- I'm not sure how much more I can do other than set up the camera as I did, place the focus zone on the subject and hold the AF button down. The rest is kinda out of my hands.
I can't say for sure what's wrong with yours, but I have been using manual focus lens, catch-in-focus and AF-S, my hit rate is 100% - that is if the focus confirmation is not on, the shutter will not trip. I have fired sequence of shots (shooting mode continuous) and I have plenty of similar shots to choose from (all in focus). And I am using my k-3 and k-5IIs as well.

07-21-2015, 01:48 PM   #39
Senior Member
GoldenRGuy's Avatar

Join Date: Dec 2010
Location: Kingston, Ontario
Photos: Albums
Posts: 154
Original Poster
QuoteOriginally posted by Rupert Quote
I've have only recently ever used AF-C. On my K5IIs it worked perfectly, getting me a fast group of shots with plenty in perfect focus to pick from. I was shooting a fast and jittery moving Jay bird and it was plenty adequate for what I was hoping for.

They move fast and are very jittery!


I admit I am not much of a fast action shooter, and my experience was brief and maybe not typical, but I was very pleased to have a choice of shots to choose from with the results. That's my two cents...for what it's worth?

Can't let this go by without letting a damn squirrel in here, it is what I mostly shoot and you don't often need a fast lens or AF system for these lazy squirrels.

Peanut butter on a branch might cause a little action, but not much else will....


Most often you have time to do an oil painting.....


Overall, Pentax makes some pretty neat cameras, I am happy to own one and was happy with all the past models too. Sure, there are others with nice features, but every time I compare, Pentax seems to have the most of the best....and at a better price too!
Regards!
What lens were you using?
07-21-2015, 05:52 PM   #40
Loyal Site Supporter




Join Date: Sep 2006
Location: Texas
Photos: Gallery | Albums
Posts: 23,775
QuoteOriginally posted by GoldenRGuy Quote
What lens were you using?
The Bigma 50-500....I use it more than anything else I have. These were not its best examples, but they fit the topic at hand.

This would be a better Jay ......also shot with the Bigma.

https://www.flickr.com/photos/129469263@N03/albums/72157651162955781/page1

And a better squirrel...although Otis declares there is no such thing as a "bad" squirrel shot.

https://www.flickr.com/photos/129469263@N03/sets/72157651153186152

The Bigma is a fun lens to use, I have enjoyed it even more on the K5IIs....I do shoot mostly animals, and for fun and relaxation the Bigma and Pentax are both winners for me!

Best Regards!
07-21-2015, 10:11 PM   #41
Forum Member




Join Date: Aug 2014
Location: North Yorkshire
Posts: 51
QuoteOriginally posted by stevebrot Quote
There is not much that is on the level of the upper tier Nikon bodies. With a fast AF lens, Pentax is on par with the Canon product though.


Steve
Not in my experience Steve. A Canon 70D, 7D and even the latest 760D will own the K3 when it comes to AF-C particularly for subjects that move erratically. Move up to something like the 7D mk II and the performance difference is even more pronounced. For what it's worth, I shot a Canon 700D with a 55-250mm STM lens alongside a guy (a Pentax ambassador) using a Pentax K3 + DA* 300mm at a race track last year with cars coming pretty much straight at us and braking from 120mph down to around 50-60mph. This was by no means a structured, scientific test and is a single (my only) example, but on that occasion the Canon setup performed considerably better than the K3.

To balance the above a little, here's a link to a K3 image on my Flickr taken using a Sigma 150-500mm. My thoughts on its performance are in the comments below the image.

https://flic.kr/p/vEnHrN

IMHO, if you want a camera predominantly for AF-C work don't buy a K3. However, if you want the very best all round APS-C body and only need to use AF-C tracking occasionally, then you can't go wrong with the K3.

Cheers,

Simon.

Last edited by Srhphoto; 07-21-2015 at 10:15 PM. Reason: Added link to an image.
07-22-2015, 05:03 AM - 1 Like   #42
Pentaxian
audiobomber's Avatar

Join Date: May 2008
Location: Sudbury, Ontario
Photos: Albums
Posts: 6,631
If one owns a Canon, it is dead simple to find what settings experts recommend for action. With a K-3, there is no such wealth of experience, and only vague instructions from the manufacturer. I've seen many threads where people complain about K-3 tracking. When questioned about settings, the reason for the bad result becomes clear; the camera was improperly set up.

IME, for tracking with a K-3, you must use SEL Expandable point with AF Hold ON, you must turn off SR, and you must ensure initial focus is locked on the subject before releasing the burst.

My current defaults:

AF-C focus mode
Hi-Speed continuous burst
Center AF point, with 25 point expansion
SR OFF
Custom Menu Parameter Settings:
16. 1st frame action in AF-C - FOCUS PRIORITY (make sure focus is on the target before shooting, or you'll have a string of misses)
17. Action in AF-C Continuous - FOCUS PRIORITY
18. Hold AF status - HIGH

I don't claim these are the best for every situation, but this is where I start.
07-22-2015, 05:33 AM   #43
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: Liverpool, NY
Photos: Gallery
Posts: 12,308
AF.C and Expanded AF. I would not have tried that with the K-5. Of course the K-5 didn't have Expanded AF, just 5 or 9 point.

07-22-2015, 06:31 AM   #44
Pentaxian
audiobomber's Avatar

Join Date: May 2008
Location: Sudbury, Ontario
Photos: Albums
Posts: 6,631
QuoteOriginally posted by boriscleto Quote
AF.C and Expanded AF. I would not have tried that with the K-5. Of course the K-5 didn't have Expanded AF, just 5 or 9 point.
The K-5 has no settings to control tracking. The K-3 has Auto Select 9 and 27 points, which guarantee the camera will focus on something. In AF-C mode & Focus Priority, the camera re-focusses for every shot, but not necessarily on your initial subject. That is not tracking.

Expanded Area AF starts out with a focal point that you specify (I just use the center point). As long as that point is in focus when you release the shutter, in AF-C with AF Hold ON, the subject is identified by shape and colour, and the focus point tries to follow the subject. That is tracking.
07-22-2015, 10:23 AM   #45
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,231
QuoteOriginally posted by Srhphoto Quote
Not in my experience Steve.
No problem. My statement was based on the complaints of Canon users shooting next to me at bicycle races. Of course bike races are notoriously difficult for any AF system. Trying to track the leader on a corner with 20 or so members of the peloton jockeying behind is not easy. FWIW, the K-3 is a fail for that case as well.


Steve
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!
action, af, auto, bit, camera, canon or nikon, dslr, focus, k-3, k3, k3 auto focus, lenses, matter, movement, nikon, os, pentax, pentax k-3, review, reviews, shutter, situations, sr, wedding
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is K5 Low Light AF Really that "Bad?" Biff Pentax K-5 16 05-10-2013 03:28 PM
Pentax: Is it really that bad for moving objects? TimonW Pentax DSLR Discussion 132 04-10-2013 11:20 AM
K7 High ISO is really that bad? minahasa Pentax DSLR Discussion 27 01-16-2013 07:16 PM
Is the DA 18-135 really that bad? Rich7333 Pentax SLR Lens Discussion 22 09-17-2012 10:18 AM
Is the SDM failure rate really that bad coreyhkh Pentax SLR Lens Discussion 108 07-21-2012 07:33 PM



All times are GMT -7. The time now is 07:12 AM. | See also: NikonForums.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