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DPChallenge Forums >> Hardware and Software >> canon 7d
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Showing posts 26 - 41 of 41, (reverse)
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 11/24/2009 10:54:48 PM · #26
Thanks a lot Shanon. I thought at a higher resolution the noise would actually be worse.
 12/09/2009 05:06:27 AM · #27
Shannon, I see you used the same lens for the tests. Interesting color difference between the two cameras.

How have you found the AF compared to the 40d?

Question about the 18mp. If I set the camera at a lower file size (18mp is BIG and a lot of my shooting would not require this let alone my computer storage system!!) say 12mp, will this affect iso quality also, would it get even better? Not sure how this works.

Message edited by author 2009-12-09 05:08:53.
 12/09/2009 11:23:19 AM · #28
So is this camera a replacement of the 50D or the 5D or is it meant to fall somewhere in between the two? I've only just started contemplated starting to try to save up for a new body. Though my 30D is still doing me fine.
 12/09/2009 11:25:11 AM · #29
Originally posted by ragamuffingirl:
So is this camera a replacement of the 50D or the 5D or is it meant to fall somewhere in between the two? I've only just started contemplated starting to try to save up for a new body. Though my 30D is still doing me fine.


It's basically the extreme evolution of the 10D-50D line. It's definitely not a 5D replacement, it's not FF. The naming is confusing, though; leaves open the possibility of a 60D that costs less, in the future, I guess? I don't really know.

R.
 12/09/2009 11:37:51 AM · #30
Okay, if I can come up with $500 for a new bike in 3 months, I could come up with $1000 for a new body in 6 months. Right? At least in theory.
 12/09/2009 12:11:39 PM · #31
Originally posted by RamblinR:
Shannon, I see you used the same lens for the tests. Interesting color difference between the two cameras.

I used an ExpoDisc to set a custom white balance on both, and it's likely that I didn't aim at exactly the same spot on the light source for this quick test, so I wouldn't read too much into the difference.

Originally posted by RamblinR:
How have you found the AF compared to the 40d?

AF is quicker and more accurate on the 7D, but you'd only notice it on fast action or very low light. In a studio setting they're both essentially equal.

Originally posted by RamblinR:
If I set the camera at a lower file size...

I doubt if it would have any effect since the sensor gathers the same amount of light regardless of output size. Most likely the camera is still shooting a full resolution frame and downsampling to a smaller file.

Originally posted by RamblinR:
So is this camera a replacement of the 50D or the 5D or is it meant to fall somewhere in between the two?

What Bear_Music said. It's close to the 5D II in capability, but in a parallel line of cameras suited to different purposes. It's sort of a third class intended to compete with Nikon's D300s.
 12/09/2009 08:11:14 PM · #32
I want one! :-(
 12/09/2009 08:49:07 PM · #33
Doesnt the AF speed have more to do with the lens than the body? like my 17-40 and my 70-300 have nice fast AF but my 24-70 is noticeably slower...
 12/09/2009 09:34:45 PM · #34
as far as i remember canon said they have newly designed and improved version of AF on 7d. And if i understand it correctly this is one of the features that set it apart from other apc cams of canon and put into level of higher end pro bodies.
 12/09/2009 09:52:19 PM · #35
Originally posted by zxaar:
as far as i remember canon said they have newly designed and improved version of AF on 7d. And if i understand it correctly this is one of the features that set it apart from other apc cams of canon and put into level of higher end pro bodies.


More accurate I would agree but actual focus speed is what Im questioning.
 12/09/2009 10:42:13 PM · #36
Originally posted by dknourek:
Originally posted by zxaar:
as far as i remember canon said they have newly designed and improved version of AF on 7d. And if i understand it correctly this is one of the features that set it apart from other apc cams of canon and put into level of higher end pro bodies.


More accurate I would agree but actual focus speed is what Im questioning.


yes but it depends on the system, i think canon has inlense motors for AF so in that way yes, it is more dependent on lense than on body.

But another type where body has AF motor and not the lense for example pentax, it depends on body. For example my 50mm F1.4 focus much much more faster on my k-x than compared to k100d i used to have.

Liveview AF for canon is still contrast detect so in liveview mode AF is bound to be slower and that factor effects much more, so in this case AF might be more dependent on body than lense.

12/09/2009 11:37:10 PM · #37
the 7D has basicly the center grouping from the 1D and they are more sensitive cross type than on the xxD camera's that is as i understand why it focus's faster and in lower light. I know its much better than the 40D
 12/10/2009 12:06:03 AM · #38
Originally posted by zxaar:
Originally posted by dknourek:
Originally posted by zxaar:
as far as i remember canon said they have newly designed and improved version of AF on 7d. And if i understand it correctly this is one of the features that set it apart from other apc cams of canon and put into level of higher end pro bodies.


More accurate I would agree but actual focus speed is what Im questioning.


yes but it depends on the system, i think canon has inlense motors for AF so in that way yes, it is more dependent on lense than on body.

But another type where body has AF motor and not the lense for example pentax, it depends on body. For example my 50mm F1.4 focus much much more faster on my k-x than compared to k100d i used to have.

Liveview AF for canon is still contrast detect so in liveview mode AF is bound to be slower and that factor effects much more, so in this case AF might be more dependent on body than lense.


Are we talking Pentax now or Canon, I was specifically talking about what the topic was about that that is the CANON 7D... I realize that some other lenses from OTHER manufacturers have the AF motors in the body but the 7D does NOT...
 12/10/2009 01:00:49 AM · #39
Originally posted by dknourek:
Originally posted by zxaar:
Originally posted by dknourek:
Originally posted by zxaar:
as far as i remember canon said they have newly designed and improved version of AF on 7d. And if i understand it correctly this is one of the features that set it apart from other apc cams of canon and put into level of higher end pro bodies.


More accurate I would agree but actual focus speed is what Im questioning.


yes but it depends on the system, i think canon has inlense motors for AF so in that way yes, it is more dependent on lense than on body.

But another type where body has AF motor and not the lense for example pentax, it depends on body. For example my 50mm F1.4 focus much much more faster on my k-x than compared to k100d i used to have.

Liveview AF for canon is still contrast detect so in liveview mode AF is bound to be slower and that factor effects much more, so in this case AF might be more dependent on body than lense.


Are we talking Pentax now or Canon, I was specifically talking about what the topic was about that that is the CANON 7D... I realize that some other lenses from OTHER manufacturers have the AF motors in the body but the 7D does NOT...


i think you shall read again, pentax was just an example of places where AF is dependent on body not on lense. (because you said it is dependent of lense).

I was talking about canon models (that includes 7d).
The liveview example was to show you where even if you have lense that has goof AF motor could focus slowly because of body. (again that includes canon bodies, if 7d has liveview it includes it also).
12/10/2009 11:17:24 AM · #40
Originally posted by zxaar:
i think you shall read again, pentax was just an example of places where AF is dependent on body not on lense. (because you said it is dependent of lense).


Not to sound rude but dont really care what Pentax, Nikon, Fuji... has for AF bodies or lenses as I was specificly talking about the Canon 7D and Canon Lenses

Originally posted by zxaar:

I was talking about canon models (that includes 7d).
The liveview example was to show you where even if you have lense that has goof AF motor could focus slowly because of body. (again that includes canon bodies, if 7d has liveview it includes it also).


And Im sorry but how did Live view get in to this? Anyway Im done discussing this as its going nowhere... have a great day.


12/10/2009 12:58:47 PM · #41
Originally posted by dknourek:
And Im sorry but how did Live view get in to this? Anyway Im done discussing this as its going nowhere... have a great day.

Uh...David, zxaar's point is valid, and he's right. If focus speed depended solely upon the lens motor, then autofocus in Live View mode (including the 7D) would never be an issue. The camera must lock focus on a point using internal mechanisms, and the same lens will focus at different speeds on different cameras.
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