AF-C of K-7 is marketing trick

Bunny Gear · 07-19-2009, 07:09 PM

I'm a bit confused with AF-C speed of K-7.
It really works good, better than K20D, but it's hard to exceed 3 fps (even without CA and distortion correction).
For example, D300 can make 6 fps till buffer filled, with 100% result in focus (not always, of course, but it could be REAL), K-7 can't make 4-5 fps.
The average speed (depends on lens) approx. 2.5-3 fps. It's true.
The specification of K-7 is marketing trick.
5.2 fps is only in AF-S.

Andi Lo · 07-19-2009, 07:14 PM

I would say that if high burst is one of your requirements you shouldn't be with Pentax in the first place... It is indeed disappointing and I guess Pentax still have some ways to go with the fps and AF department.

Does it say anywhere that 5.2 fps is for AF-C as well?

Bunny Gear · 07-19-2009, 08:18 PM

Originally posted by Andi Lo

Does it say anywhere that 5.2 fps is for AF-C as well?

No. But, they didn't say that 5.2 fps is just for AF-S.

To say honest, I don't need 5.2 fps in AF-S. I'd like on the contrary:
AF-S - 3.3 fps, AF-C - 5.2 fps. Or like another brands can.

*isteve · 07-19-2009, 10:11 PM

Originally posted by Bunny Gear

No. But, they didn't say that 5.2 fps is just for AF-S.

To say honest, I don't need 5.2 fps in AF-S. I'd like on the contrary:
AF-S - 3.3 fps, AF-C - 5.2 fps. Or like another brands can.

Which other brands?

I cant get a D300 to go much over 4fps when having to track something, which is down to the lens and AF speed.

MJB DIGITAL · 07-19-2009, 11:31 PM

OK so that means when the bride walks down the isle I can only get like 45 shots of it if I use that mode....

dang. i wanted to do EVEN MORE editing.

lol101 · 07-19-2009, 11:51 PM

Originally posted by *isteve

Which other brands?

I cant get a D300 to go much over 4fps when having to track something, which is down to the lens and AF speed.

I think it's all down to some option like "focus priority: on/off". When focus priority is on, the camera won't fire if the shot is not confimed in focus: you get more keepers but the frame rate can go down. When off, you should get the rated 6fps but some oof shots will appear.

Does the K-7 have such an option or is it in "focus priority" by design?

Bunny Gear · 07-20-2009, 12:32 AM

Originally posted by *isteve

Which other brands?

I cant get a D300 to go much over 4fps when having to track something, which is down to the lens and AF speed.

It's not truth. D300 really can 6 fps.
Canon 50D is in the same league too.

K-7 is the best among Pentax in AF-C, but it's lower level than Nikon/Canon/Olympus.
D300 AF system is close to perfect.

nostatic · 07-20-2009, 12:34 AM

Originally posted by Bunny Gear

It's not truth. D300 really can 6 fps.
Canon 50D is in the same league.

Sure it is not just a "marketing trick"?

Or is it a trick of the light?

Or tripping the light fantastic?

Or the fantastic four?

Fore!

Which brings us back to golf where a lower score is better. Pentax is a hole in one!

Bunny Gear · 07-20-2009, 02:19 AM

Originally posted by nostatic

Sure it is not just a "marketing trick"?

Or is it a trick of the light?

Or tripping the light fantastic?

Or the fantastic four?

Fore!

Which brings us back to golf where a lower score is better. Pentax is a hole in one!

I don't understand your humor.
K-7 needs upgrade already.

Good machine. But really needs long list for frimware 1.1.

Pentaxor · 07-20-2009, 02:52 AM

bunny gear, did you do actual fps tests on the K-7?

Bunny Gear · 07-20-2009, 03:24 AM

Originally posted by Pentaxor

bunny gear, did you do actual fps tests on the K-7?

yes. what else?

falconeye · 07-20-2009, 04:03 AM

Originally posted by Bunny Gear

For example, D300 can make 6 fps till buffer filled, with 100% result in focus (not always, of course, but it could be REAL), K-7 can't make 4-5 fps.
The average speed (depends on lens) approx. 2.5-3 fps. It's true.
The specification of K-7 is marketing trick.
5.2 fps is only in AF-S.

I've run an AF.C reference test
Falk Lumo: K-7 and its continuous autofocus -- PART I
The test setup was standardized by a German photo magazine and results for various brands and models are known.
As you can read, the K-7 delivers 14 images within 3.6s (13 which of were good, run #3). This not only is 3.9 fps in AF.C, it is an exact match of the D300 performance too (13 good images for the same test).

Additionally, your thread title is misleading because Pentax never claimed 5.2fps would be independent from subject speed or autofocus mode. Nor did any other vendor out there.

I cannot see where you are getting your negative mood from.

Jasvox · 07-20-2009, 05:02 AM

measurebating, masturbating...not much difference...a cheap substitute for those who don't know how to do the real deal.

Jason

lithos · 07-20-2009, 05:08 AM

Originally posted by MJB DIGITAL

OK so that means when the bride walks down the isle I can only get like 45 shots of it if I use that mode....

dang. i wanted to do EVEN MORE editing.

You can't spell "photographer" without "Photoshop." Wait...

and · 07-20-2009, 05:11 AM

I did notice a speed difference when I tested the camera in a shop, using AF or MF, aiming at the same object it was clear from the sound that the fps was different even tho the camera was not pointing at something that was moving.

altho as has been said, it was only stated what fps it can do, not that it can do it with af.

07-19-2009, 07:09 PM	#1
Bunny Gear Banned Join Date: Jun 2009 Location: China Posts: 53	AF-C of K-7 is marketing trick I'm a bit confused with AF-C speed of K-7. It really works good, better than K20D, but it's hard to exceed 3 fps (even without CA and distortion correction). For example, D300 can make 6 fps till buffer filled, with 100% result in focus (not always, of course, but it could be REAL), K-7 can't make 4-5 fps. The average speed (depends on lens) approx. 2.5-3 fps. It's true. The specification of K-7 is marketing trick. 5.2 fps is only in AF-S.

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07-19-2009, 07:14 PM	#2
Andi Lo Veteran Member Join Date: Jul 2008 Location: Halifax, Nova Scotia Posts: 2,924	I would say that if high burst is one of your requirements you shouldn't be with Pentax in the first place... It is indeed disappointing and I guess Pentax still have some ways to go with the fps and AF department. Does it say anywhere that 5.2 fps is for AF-C as well?

07-19-2009, 08:18 PM	#3
Bunny Gear Banned Join Date: Jun 2009 Location: China Posts: 53 Original Poster	Originally posted by Andi Lo Does it say anywhere that 5.2 fps is for AF-C as well? No. But, they didn't say that 5.2 fps is just for AF-S. To say honest, I don't need 5.2 fps in AF-S. I'd like on the contrary: AF-S - 3.3 fps, AF-C - 5.2 fps. Or like another brands can.

07-19-2009, 10:11 PM	#4
*isteve Veteran Member Join Date: Nov 2006 Location: London, England Posts: 1,187	Originally posted by Bunny Gear No. But, they didn't say that 5.2 fps is just for AF-S. To say honest, I don't need 5.2 fps in AF-S. I'd like on the contrary: AF-S - 3.3 fps, AF-C - 5.2 fps. Or like another brands can. Which other brands? I cant get a D300 to go much over 4fps when having to track something, which is down to the lens and AF speed.

07-19-2009, 11:31 PM	#5
MJB DIGITAL Veteran Member Join Date: Jul 2007 Location: st. louis Posts: 1,170	OK so that means when the bride walks down the isle I can only get like 45 shots of it if I use that mode.... dang. i wanted to do EVEN MORE editing.

07-19-2009, 11:51 PM	#6
lol101 Veteran Member Join Date: Jul 2007 Location: Garennes sur Eure France Photos: Gallery Posts: 899	Originally posted by *isteve Which other brands? I cant get a D300 to go much over 4fps when having to track something, which is down to the lens and AF speed. I think it's all down to some option like "focus priority: on/off". When focus priority is on, the camera won't fire if the shot is not confimed in focus: you get more keepers but the frame rate can go down. When off, you should get the rated 6fps but some oof shots will appear. Does the K-7 have such an option or is it in "focus priority" by design?

07-20-2009, 12:32 AM	#7
Bunny Gear Banned Join Date: Jun 2009 Location: China Posts: 53 Original Poster	Originally posted by *isteve Which other brands? I cant get a D300 to go much over 4fps when having to track something, which is down to the lens and AF speed. It's not truth. D300 really can 6 fps. Canon 50D is in the same league too. K-7 is the best among Pentax in AF-C, but it's lower level than Nikon/Canon/Olympus. D300 AF system is close to perfect.

07-20-2009, 12:34 AM	#8
nostatic Veteran Member Join Date: Feb 2008 Location: socal Photos: Gallery Posts: 1,575	Originally posted by Bunny Gear It's not truth. D300 really can 6 fps. Canon 50D is in the same league. Sure it is not just a "marketing trick"? Or is it a trick of the light? Or tripping the light fantastic? Or the fantastic four? Fore! Which brings us back to golf where a lower score is better. Pentax is a hole in one!

07-20-2009, 02:19 AM	#9
Bunny Gear Banned Join Date: Jun 2009 Location: China Posts: 53 Original Poster	Originally posted by nostatic Sure it is not just a "marketing trick"? Or is it a trick of the light? Or tripping the light fantastic? Or the fantastic four? Fore! Which brings us back to golf where a lower score is better. Pentax is a hole in one! I don't understand your humor. K-7 needs upgrade already. Good machine. But really needs long list for frimware 1.1.

07-20-2009, 02:52 AM	#10
Pentaxor Veteran Member Join Date: May 2009 Location: Vancouver, B.C. Photos: Gallery Posts: 6,513	bunny gear, did you do actual fps tests on the K-7?

07-20-2009, 03:24 AM	#11
Bunny Gear Banned Join Date: Jun 2009 Location: China Posts: 53 Original Poster	Originally posted by Pentaxor bunny gear, did you do actual fps tests on the K-7? yes. what else?

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07-20-2009, 04:03 AM	#12
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by Bunny Gear For example, D300 can make 6 fps till buffer filled, with 100% result in focus (not always, of course, but it could be REAL), K-7 can't make 4-5 fps. The average speed (depends on lens) approx. 2.5-3 fps. It's true. The specification of K-7 is marketing trick. 5.2 fps is only in AF-S. I've run an AF.C reference test Falk Lumo: K-7 and its continuous autofocus -- PART I The test setup was standardized by a German photo magazine and results for various brands and models are known. As you can read, the K-7 delivers 14 images within 3.6s (13 which of were good, run #3). This not only is 3.9 fps in AF.C, it is an exact match of the D300 performance too (13 good images for the same test). Additionally, your thread title is misleading because Pentax never claimed 5.2fps would be independent from subject speed or autofocus mode. Nor did any other vendor out there. I cannot see where you are getting your negative mood from.

07-20-2009, 05:02 AM	#13
Jasvox Veteran Member Join Date: Oct 2007 Location: Melbourne, Australia Posts: 3,107	measurebating, masturbating...not much difference...a cheap substitute for those who don't know how to do the real deal. Jason

07-20-2009, 05:08 AM	#14
lithos Inactive Account Join Date: Oct 2007 Location: Brisbane, QLD, AUS Posts: 3,261	Originally posted by MJB DIGITAL OK so that means when the bride walks down the isle I can only get like 45 shots of it if I use that mode.... dang. i wanted to do EVEN MORE editing. You can't spell "photographer" without "Photoshop." Wait...

07-20-2009, 05:11 AM	#15
and Veteran Member Join Date: Mar 2007 Photos: Gallery Posts: 2,476	I did notice a speed difference when I tested the camera in a shop, using AF or MF, aiming at the same object it was clear from the sound that the fps was different even tho the camera was not pointing at something that was moving. altho as has been said, it was only stated what fps it can do, not that it can do it with af.