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Help! New K 7 no 5fps...
- Thread starter mymy1986
- Start date
DDoram
Forum Pro
Turn off lens correction, put in MF. If you are set to AFC the camera will not fire shutter until subject in focus.
Dale
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Dale
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http://www.pbase.com/abundant108
http://www.pentaxphotogallery.com/home#section=ARTIST&subSection=272176&subSubSection=1787360&language=EN
jeanphilippe Goube
Senior Member
Possible causes :
image correction (chromatic aberration, distortion correction); takes CPU time.
AF-C mode (the camera is obliged to adjust the focus between 2 shots)
Cheers
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jpgoube
image correction (chromatic aberration, distortion correction); takes CPU time.
AF-C mode (the camera is obliged to adjust the focus between 2 shots)
Cheers
--
jpgoube
Fogel70
Senior Member
If you can get 5 FPS in AF-S mode it shouldn't be a memory card problem.
I don't think you can get 5 fps in AF-C mode on K-7 as the AF speed is not fast enough, but a lens that focus quickly helps a little.
I don't think you can get 5 fps in AF-C mode on K-7 as the AF speed is not fast enough, but a lens that focus quickly helps a little.
Roland Mabo
Forum Pro
Sandisk Ultra II is too slow. It is a card good enough for the *ist-serie, but the K serie is faster and K-7 can clearly take advantage of faster cards.
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Take care
R
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R
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Fogel70
Senior Member
You can test FPS without any memory card.
What FPS do you get in AF-S mode?
What FPS do you get in AF-C mode?
In AF-S I get 5 FPS even with a slow memory card on my K-7, but in AF-C I get max 4 FPS in good lighting conditions and a lens that focus quickly.
But FPS can easily be much slower if lighting is not good or if the lens has to make big focus adjustments between shots.
What FPS do you get in AF-S mode?
What FPS do you get in AF-C mode?
In AF-S I get 5 FPS even with a slow memory card on my K-7, but in AF-C I get max 4 FPS in good lighting conditions and a lens that focus quickly.
But FPS can easily be much slower if lighting is not good or if the lens has to make big focus adjustments between shots.
viking79
Forum Pro
Slowest memory card on the market can do 5 fps for a short time as the buffer can hold 15 or so frames in RAW. After the buffer fills up, the memory card write speed matters a great deal. I think the K-7 can push about 20 MB/s to the memory card, maybe even more than that. So the Ultra II will limit the K-7, but it shouldn't be bad. My guess is it is your AF setting as well.
Eric
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Chancey Nancy
Member
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When I first got my K7 I was still using the old Class 2 4GB card I always used with the K10D. I don't use burst mode a lot, but testing the movie mode told me that, my particular card could only keep up with 10s of 780p. This was kind of troubling as despite common sentiment I find the integrated video incredibly useful. I'm getting way better quality out of the K7 at the 640x whatever mode than I was on a $3000 canon 3CCD a few years ago, and with easier to deal with video (I hate magnetic tape).
Anyway, back to the point, I picked up a Sandisk Extreme Class 10 (which interestingly on the packaging also claims to be 30MB/s write, which I've confirmed by copying various large files to it from fast hard drives... which is supposed to be Class 20.
Anywho, after I got that all my burst problems disappeared too. I sometimes use the autobracket burst mode for HDRs when I'm too lazy for a tripod and generally the busy light has already stopped flashing by the time I look down at the camera again. Got to test it again the other night, doing a giant series of 6 to 14MP JPGs to string together into video clips for 2 live bands. Shot 580 pictures in 5fps burst for about 2 hours straight and never had a slowdown... so yeah, it's definitely the card.
Anyway, back to the point, I picked up a Sandisk Extreme Class 10 (which interestingly on the packaging also claims to be 30MB/s write, which I've confirmed by copying various large files to it from fast hard drives... which is supposed to be Class 20.
Anywho, after I got that all my burst problems disappeared too. I sometimes use the autobracket burst mode for HDRs when I'm too lazy for a tripod and generally the busy light has already stopped flashing by the time I look down at the camera again. Got to test it again the other night, doing a giant series of 6 to 14MP JPGs to string together into video clips for 2 live bands. Shot 580 pictures in 5fps burst for about 2 hours straight and never had a slowdown... so yeah, it's definitely the card.
Mark Stiebel
Forum Enthusiast
Maybe an obvious suggestion, but also make sure you've select the "Hi" continuous shooting option and not the "Lo" option in the drive menu.
ozdean
Forum Pro
Doesn't AFC fire whether you are in focus or not? AFS waits for focus.
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Regards Dean - Capturing Creation
Fogel70
Senior Member
AF-S waits for focus only on the first shot, and on shots after that AF is disabled.
AF-C calculates focus between each shot and moves focus if necessary, but it does not wait for AF as in AF-S. But AF-C need to adjust focus between shots, otherwise all shots in AF-C would be OOF.
jeanphilippe Goube
Senior Member
Roland,
shouldn't it be capable to achieve 5 fps with the internal buffer of the camera ? If the memory card is too slow then he should be capable of something like 14 JPEG shots at 5 fps with the internal buffer and then slow down caused by transfer on the memory card
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jpgoube
shouldn't it be capable to achieve 5 fps with the internal buffer of the camera ? If the memory card is too slow then he should be capable of something like 14 JPEG shots at 5 fps with the internal buffer and then slow down caused by transfer on the memory card
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jpgoube
The card has nothing to do with it. At least not before the internal camera buffer is full.
I run my Nikon D3 mostly with cheapo UltraII cards -- at 9fps. Works just fine, as long as the internal buffer doesn't run out. Same principal goes for all DSLRs.
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Take care,
Jorgen
Probere necesse est.....
Maybe it's just because the K-7 can't really achieve 5fps in continuous AF while tracking a subject? The focus track algorithm/mechanism is still not fast enough for that and you won't get much better performances from a faster card or a faster lens.
5fps should be atainable on static subjects or in AF-S mode though.
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snostorm
Senior Member
Hi mymy,
Let's say that you want to shoot BIF or some other motion with the highest continuous frame rate for the longest strings. . .
Help the AF system by disabling any Automatic features you can get away with (to allow the AF system all the processing power it can get). Definitely turn off lens correction, use Manual exposure, or at most Av or Tv priority, set a fixed ISO and WB and set the exposure so you don't need Ev comp, use single select focus point or center focus, not multipoint (this alone will slow frame rate to 3fps). In AF C, allow the AF system to gain an initial focus (beep) before you actuate the shutter, or all the shots in the string will be OOF, and of course have the shutter set at continuous high. Make sure there's enough light, or use a high enough ISO to keep the shutter speeds as high as is feasible. A fast card (20MB/sec or 133x) also helps, as does shooting in jpeg for longer strings. For very long strings, I'm told that lowering the resolution to 6MP and using a 30MB/sec (200x) card gets you 5+fps for as long as you hold the shutter, but I've never had the need to try it.
The K-7's AF C is usually given a bad rap -- it's not nearly as bad as most make it out to be, and it's quite a bit better than the K20, which was quite a bit better than the K10. . . The K-7 is by far the easiest body to shoot continuously because of the very quick mirror action -- easily the fastest Pentax body when it comes to VF blackout times, so you are able to track a moving subject a whole lot easier -- you have to compare it with an older body to appreciate it.
Scott
Let's say that you want to shoot BIF or some other motion with the highest continuous frame rate for the longest strings. . .
Help the AF system by disabling any Automatic features you can get away with (to allow the AF system all the processing power it can get). Definitely turn off lens correction, use Manual exposure, or at most Av or Tv priority, set a fixed ISO and WB and set the exposure so you don't need Ev comp, use single select focus point or center focus, not multipoint (this alone will slow frame rate to 3fps). In AF C, allow the AF system to gain an initial focus (beep) before you actuate the shutter, or all the shots in the string will be OOF, and of course have the shutter set at continuous high. Make sure there's enough light, or use a high enough ISO to keep the shutter speeds as high as is feasible. A fast card (20MB/sec or 133x) also helps, as does shooting in jpeg for longer strings. For very long strings, I'm told that lowering the resolution to 6MP and using a 30MB/sec (200x) card gets you 5+fps for as long as you hold the shutter, but I've never had the need to try it.
The K-7's AF C is usually given a bad rap -- it's not nearly as bad as most make it out to be, and it's quite a bit better than the K20, which was quite a bit better than the K10. . . The K-7 is by far the easiest body to shoot continuously because of the very quick mirror action -- easily the fastest Pentax body when it comes to VF blackout times, so you are able to track a moving subject a whole lot easier -- you have to compare it with an older body to appreciate it.
Scott
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