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Archive 2009 · FF vs. APS-C FOV
  
 
rogie
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p.2 #1 · FF vs. APS-C FOV


Pixel Perfect wrote:
rogie wrote:
so if a FF cam was shot at point A with a crop cam also shot with the same lens from point A (same distance) but obvious framing difference. would both cams have the same depth of field. the way i understood is that ff is able to achieve shallower dof because it can shoot closer with the same framing as a crop cam given the same lenses. is this right or not?

No, in this case the DOF will be smaller for the crop camera. The subject will appear larger using the crop camera. The magnification is higher, thus the DOF is less. If you cropped the FF shot however, to the same FOV, and then made identical sized prints, the DOF would be the same.
u totally lost me at the point of where u come to printing. how does printing at the same size make dof the same AFTER the fact that the shot has been taken already?

Mar 19, 2010 at 04:33 AM
schristie11
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p.2 #2 · FF vs. APS-C FOV


Here's my comparison:

5D + 24L


This image is copyrighted by the owner




Rebel XSi + 24L


This image is copyrighted by the owner





5D + 24L


This image is copyrighted by the owner




Rebel XSi + 24L


This image is copyrighted by the owner

Mar 19, 2010 at 06:01 AM
BrianO
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p.2 #3 · FF vs. APS-C FOV


rogie wrote: ...the way i understood is that ff is able to achieve shallower dof because it can shoot closer with the same framing as a crop cam given the same lenses. is this right or not?

That is correct.

If the camera-to-subject distance is the same, the cropped-sensor camera will have less DoF with the same lens and aperture, but if you decrease the distance the DoF also decreases; and since you can get closer with the FF camera for the same FoV, you'll have shallower DoF than with the cropped-sensor camera, which must be further back for that FoV.

For example, using the same 200mm lens as in my previous example, to fill the frame of a 5D Mark II from top to bottom (in landscape orientation) with a six-foot tall man we would have to be 50 feet away. Assuming an aperture of f/8, for example, that would give a DoF of 9.1 feet.

To fill the frame of a 50D with that six-foot tall man, we would have to be 80 feet away, which at f/8 would give a DoF of 14.8 feet.

So in this example the FF camera has just a bit more than half the DoF of the APS-C camera for the same FoV.

Mar 19, 2010 at 07:25 AM
BrianO
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p.2 #4 · FF vs. APS-C FOV


schristie11 wrote: Here's my comparison:



This image is copyrighted by the owner




Is that a katana or a tachi on the wall in the background?

Mar 19, 2010 at 07:38 AM
schristie11
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p.2 #5 · FF vs. APS-C FOV


Yes, the Tachi on the wall is a real and sharpened fighting sword not just for looks.

Mar 19, 2010 at 06:47 PM
ohyeah
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p.2 #6 · FF vs. APS-C FOV


rprouty wrote:


Great examples!! Thanks

Also, one benefit with an APS-C/1.6x crop sensor is that your subject can/will fill more of the frame (for a smaller or more distant subject) which I've found helps a lot with metering. Especially when there's a stop or more of difference between the subject and background. I have both FF and APS-C bodies, and I especially prefer using the 7D when taking pictures of small or distant birds.

Edited on Mar 19, 2010 at 07:01 PM · View previous versions

Mar 19, 2010 at 06:52 PM
BrianO
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p.2 #7 · FF vs. APS-C FOV


schristie11 wrote: Yes, the Tachi on the wall is a real and sharpened fighting sword not just for looks.

OT, but...

I figured it was a tachi based on the emblems on the saya, but you never know these days; some "wall hangers" made in China are decorated katana. So, since I can't see the fittings in that picture I thought I'd ask to be sure.

Since it's a tachi, not a katana, and since Nihonto should be displayed as worn...yours is upside down,

Mar 19, 2010 at 06:55 PM
abam
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p.2 #8 · FF vs. APS-C FOV


very cool. i have a 500-year-old samurai sword we smuggled from japan. i'm not a real ninja, though.

Mar 19, 2010 at 07:30 PM
 



schristie11
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p.2 #9 · FF vs. APS-C FOV


Yes I have the Nihonto blade pointed up not down on that photo, your right.
I did this to ease the wood from the blade edge.
However, I should say I don't know for certain what's "best".
I do follow the care instructions once in a while to clean it with the special cleaning kit that came with it.

It was a gift from a wealthy Japanese family to me, they told me it was a real Nihonto Tachi.
Of course it's too fancy for me to ever want to fight with it. lol
I hosted our home to their daughter, as a foreign exchange student for 4 years.


Here's another photo for fun:



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Here's a MACRO photo with some detail:


This image is copyrighted by the owner

Mar 19, 2010 at 08:28 PM
BrianO
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p.2 #10 · FF vs. APS-C FOV


schristie11 wrote: Here's another photo for fun:



This image is copyrighted by the owner




Okay, that's a katana. You have it correctly placed in your katanakake (sword holder) on the wall.

(Katana are worn edge up, thrust through the obi. Tachi are worn edge down, hung from a suspension on the armor or from a belt.)

Enough off topic ramblings from me though; if anyone wants to talk about Japanese swords and/or swordsmanship, I'd welcome a PM.

Mar 20, 2010 at 06:55 AM
surly
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p.2 #11 · FF vs. APS-C FOV


schristie11 wrote:

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Someone get that child a leather jacket.

Mar 20, 2010 at 07:06 AM
schristie11
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p.2 #12 · FF vs. APS-C FOV


BrianO wrote:

Okay, that's a katana. You have it correctly placed in your katanakake (sword holder) on the wall.

(Katana are worn edge up, thrust through the obi. Tachi are worn edge down, hung from a suspension on the armor or from a belt.)

Enough off topic ramblings from me though; if anyone wants to talk about Japanese swords and/or swordsmanship, I'd welcome a PM.

I'm pretty sure it's not a Katana, it's a meter long no way your getting it on your chest. lol

Mar 20, 2010 at 07:36 AM
BrianO
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p.2 #13 · FF vs. APS-C FOV


schristie11 wrote: I'm pretty sure it's not a Katana, it's a meter long no way your getting it on your chest. lol

On your chest? I have no idea what that means.

I can tell you with 100% certainty, however, that that is a katana. The sageo (cord) is run through a simple kurigata (eye) on the saya (sheath). The saya is then thrust through an obi (sash) that is worn around the waist.

A tachi has a more elaborate set of fittings on the saya (see photo below) that allow it to be hung from the armor or a belt.








Edited on Mar 20, 2010 at 08:16 PM · View previous versions

Mar 20, 2010 at 08:12 AM
schristie11
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p.2 #14 · FF vs. APS-C FOV


I do believe you.
Thank you for taking the time to put all that up for me to learn from.
I mistook your Japanese words as I am very poor at it,
and I thought you meant one of the smaller blades
that mount on the back of chest armor, as is seen in many modern films.

everything i know I learned here: (just for a laugh)
http://tvtropes.org/pmwiki/pmwiki.php/Main/KatanasAreJustBetter

-steve

Mar 20, 2010 at 08:21 AM
RobertLynn
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p.2 #15 · FF vs. APS-C FOV


surly wrote:
schristie11 wrote:

This image is copyrighted by the owner



Someone get that child a leather jacket.

The kid has access to a katana...think of how many leather jackets he can get with that!

I was at work, and a guy is selling a hand gun. I said that I was more interested in the old rolex he was selling. He said, with the gun, you can get lots of rolex's! With the rolex, you won't get any guns, but someone with a gun will get your rolex!

Of course, it's just in good fun.

Mar 21, 2010 at 03:57 AM
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