"Admirable" blur samples

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Archive 2008 · "Admirable" blur samples

Daniel Buck
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p.22 #1 · "Admirable" blur samples

asbalyan wrote:
Focal Length doesnt impact DoF... Its a pure function of Aperture, Distance and Sensor type.

technically I think you are correct, no it doesn't. But if you aren't blowing up cropped areas of photographs and such for technical comparisons, then I think yes focal length does appear to aid in 'impacting' the look of DOF for most practical purposes?

Nov 08, 2008 at 12:01 AM

asbalyan
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p.22 #2 · "Admirable" blur samples

Daniel Buck wrote:
............. 'impacting' the look of DOF for most practical purposes.....

you are right... These are the correct words... focal length impacts the "look" of DoF...

But even in practical case, it doesnt...

http://www.luminous-landscape.com/tutorials/dof2.shtml

And geeks, (mathematically can be proved),

http://www.normankoren.com/Tutorials/MTF6.html (my fav site... My gateway to digital photography... root of my Picture Window pro usage...

)

But as you mentioned, "...impacting the the look..." , its all about CoC, which depends upon multiple factor..

There is one more catch... (these are words from second link)...

Of course the actual image sharpness at the DOF limits is degraded by diffraction, lens aberrations, film properties and possible lack of film flatness, so the overall sharpness at the DOF limits will be inevitably worse than the simple circle of confusion would indicate. For this reason alone, the standard for setting the circle of confusion is a bit loose.

Nov 08, 2008 at 03:38 AM

olyacme
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p.22 #3 · "Admirable" blur samples

The thread seems to have bogged down in technical correctness for a bit, so how about some more examples of the OMZ 90/2's neutral blur property to restart it?

Cornflower is at f/2.8, little mushroom at f/5.6. Both on a 4/3" sensor.

Nov 10, 2008 at 08:31 AM

Anden
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p.22 #4 · "Admirable" blur samples

Nice ones. The 90 is a great lens!

A

Nov 10, 2008 at 08:36 AM

Paul Yi
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p.22 #5 · "Admirable" blur samples

Rokkor 58 wide open.

2012 © Paul Yi

Nov 10, 2008 at 03:35 PM

asbalyan
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p.22 #6 · "Admirable" blur samples

Little old pics... Takumar 200mm f3.5 (preset version)...

[url=http://flickr.com/photos/asbalyan/1389408343/in/set-72157601681833030/]

[/url]

[url=http://flickr.com/photos/asbalyan/1390300484/in/set-72157601681833030/]

[/url]

Nov 10, 2008 at 04:53 PM

tmessenger
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p.22 #7 · "Admirable" blur samples

Rokkor MD 50/1.2 @ f1.2 on 10D

tm

Nov 10, 2008 at 05:07 PM

simon_k
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p.22 #8 · "Admirable" blur samples

Canon EF 50L f/1.0 wide open

not the most beautiful bokeh but the lens really gives you a lot of it (= exetremely thin DOF)

Nov 10, 2008 at 05:49 PM

ulrikft
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p.22 #9 · "Admirable" blur samples

Not my pictures, fetched from nikons archives, nikon 5cm/50mm 1.1:

This image is copyrighted by the owner

Interesting lens

Nov 12, 2008 at 09:17 AM

Ronan O Keeffe
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p.22 #10 · "Admirable" blur samples

Loving it all so far! Blur and macros is kind of cheating a bit but I like this one nevertheless.

Nov 12, 2008 at 09:57 PM

Daniel Heineck
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p.22 #11 · "Admirable" blur samples

Ronan,

Awesome shot of the dragonfly, I love the look of the wings OOF. What lens were/are you using here?

D

Nov 12, 2008 at 09:59 PM

Ronan O Keeffe
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p.22 #12 · "Admirable" blur samples

Hi Daniel,

cheers for that, it's a canon 100mm ƒ2.8 macro on a 20D. Used @3.5 1/400s

Nov 13, 2008 at 01:53 PM

PhotoMaximum
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p.22 #13 · "Admirable" blur samples

Doing a little focus testing on the 58/1.2 Rokkor.

Dim light, hand held at 1/8th, wide open at ISO 100...

This image is copyrighted by the owner

Nov 14, 2008 at 01:11 AM

asbalyan
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p.22 #14 · "Admirable" blur samples

"Could you please keep iPhone in your Pocket...."

[url=http://flickr.com/photos/asbalyan/3029437186/]

[/url]

"OK.. enough of iPhone.... Aren't you listening.... forget about change... first listen to soon-2-B-CiC"

[url=http://flickr.com/photos/asbalyan/3029439096/]

[/url]

Both captured with M42 mount Pentacon 200mm f4....

Nov 14, 2008 at 07:24 AM

thrice
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p.22 #15 · "Admirable" blur samples

ovredal73 wrote:
thrice wrote:
It's a 50% crop, sorry. It's the SMC Pentax-A 50/1.2 at f/2.0
This is 100%:
This is the whole image (was testing bokeh):

Still great bokeh and rendering for that tight. I have been looking at that lens. You like?
André

Love it

Nov 14, 2008 at 01:05 PM

ziyadj
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p.22 #16 · "Admirable" blur samples

with my new 50D and rokkor 58 (focusing is soo much easier now compared to my old 20D)

This image is copyrighted by the owner

?v=0

Nov 14, 2008 at 01:09 PM

ziyadj
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p.22 #17 · "Admirable" blur samples

photomaximum, awsome picture. Love the face. Which camera?

Nov 14, 2008 at 01:23 PM

ovredal73
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p.22 #18 · "Admirable" blur samples

thrice wrote:
It's a 50% crop, sorry. It's the SMC Pentax-A 50/1.2 at f/2.0

Love it

Somewhere out there, there is a copy on it´s way to me

I am getting quite ridiculously addicted to these 50-ish lenses. Must have ten different now

Nov 14, 2008 at 01:42 PM

thrice
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p.22 #19 · "Admirable" blur samples

I think my summicron-R 90/2 is the best portrait lens I've ever used

The 35/2 does a great job too but suffers from coma and is a little busy

Nov 14, 2008 at 02:09 PM

PhotoMaximum
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p.22 #20 · "Admirable" blur samples

ziyadj wrote:
photomaximum, awsome picture. Love the face. Which camera?

Canon 5D with Ee-S screen with newly installed screen shim/washer for more accurate focusing...

Nov 14, 2008 at 05:03 PM

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