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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 04 Apr 2008 (Friday) 11:00
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How to get nice bokeh/blur with an F4 zoom lens?

 
skywalkerbeth
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Apr 04, 2008 11:00 |  #1

Hi!

I have a new Canon 24-105 F4L lens.

I know F4 isn't going to have super blur. How do I work around that?

Should I set the aperture on F4, move back from the subject while zooming in? Or what method would work best? thanks...


Canon 7D, 30D, G1X Mark II, S90, SD800IS | Canon 35mm 1.4L | Canon 24-105 F4L IS | Polarizers | Canon 100mm F2.8 macro |Lowepro Slingshot 200 | Gitzo 1550T Tripod with 1780qr head | Remote | Diffuser
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timnosenzo
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Apr 04, 2008 11:03 |  #2

The closer you are to your subject, the better... the faster the aperture, the better... the longer focal length you're using, the better... and the further your subject is away from the background, the better.... :)


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timnosenzo
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Apr 04, 2008 11:07 as a reply to  @ timnosenzo's post |  #3

Just as an example, here's a picture of my nephew taken with my 5D & 24-105. Background is pretty blurry. 73mm @ f/5.6... so this isn't even the best it can do.

IMAGE: http://www.timnosenzo.com/photos/272003086_uLQJo-M.jpg

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skywalkerbeth
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Apr 04, 2008 11:09 |  #4

OK, thanks! I will experiment. What I was thinking of was taking Cherry Blossom photos this weekend, and how to achieve it with my new lens. I DO have a lens with a really fast aperture, but I want to learn how to make this new one sing too.


Canon 7D, 30D, G1X Mark II, S90, SD800IS | Canon 35mm 1.4L | Canon 24-105 F4L IS | Polarizers | Canon 100mm F2.8 macro |Lowepro Slingshot 200 | Gitzo 1550T Tripod with 1780qr head | Remote | Diffuser
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shutterfiend
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Apr 04, 2008 11:09 |  #5

lasso subject, inverse selection, apply gaussian blur, adjust accordingly.


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timnosenzo
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Apr 04, 2008 11:11 |  #6

A couple things that will work in your favor are...

a) this lens has a pretty close minimum focusing distance
b) @ 105mm, you're at a good telephoto FL, so you're able to compress the scene which helps isolate the subject better
c) this lens is pretty sharp even wide open

Have fun!
Tim


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ed ­ rader
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Apr 04, 2008 11:15 |  #7

skywalkerbeth wrote in post #5258943 (external link)
Hi!

I have a new Canon 24-105 F4L lens.

I know F4 isn't going to have super blur. How do I work around that?

Should I set the aperture on F4, move back from the subject while zooming in? Or what method would work best? thanks...

you're listening to the chatter of the parrots again :D!

ed rader


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skywalkerbeth
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Apr 04, 2008 11:18 |  #8

ed rader wrote in post #5259049 (external link)
you're listening to the chatter of the parrots again :D!

ed rader

ok, so it actually will?


Canon 7D, 30D, G1X Mark II, S90, SD800IS | Canon 35mm 1.4L | Canon 24-105 F4L IS | Polarizers | Canon 100mm F2.8 macro |Lowepro Slingshot 200 | Gitzo 1550T Tripod with 1780qr head | Remote | Diffuser
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skywalkerbeth
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Apr 04, 2008 11:19 |  #9

shutterfiend wrote in post #5259009 (external link)
lasso subject, inverse selection, apply gaussian blur, adjust accordingly.

er, what?


Canon 7D, 30D, G1X Mark II, S90, SD800IS | Canon 35mm 1.4L | Canon 24-105 F4L IS | Polarizers | Canon 100mm F2.8 macro |Lowepro Slingshot 200 | Gitzo 1550T Tripod with 1780qr head | Remote | Diffuser
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skywalkerbeth
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Apr 04, 2008 11:19 |  #10

timnosenzo wrote in post #5259028 (external link)
A couple things that will work in your favor are...

a) this lens has a pretty close minimum focusing distance
b) @ 105mm, you're at a good telephoto FL, so you're able to compress the scene which helps isolate the subject better
c) this lens is pretty sharp even wide open

Have fun!
Tim

thanks for the advice, this will be fun!


Canon 7D, 30D, G1X Mark II, S90, SD800IS | Canon 35mm 1.4L | Canon 24-105 F4L IS | Polarizers | Canon 100mm F2.8 macro |Lowepro Slingshot 200 | Gitzo 1550T Tripod with 1780qr head | Remote | Diffuser
My Blog: http://skywalkerbeth.b​logspot.com/ (external link)
My site: www.compassrosegalleri​es.com (external link)

  
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timnosenzo
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Apr 04, 2008 11:21 |  #11

skywalkerbeth wrote in post #5259070 (external link)
er, what?

Basically saying you could fudge it in Photoshop. I find it almost always look fake, but some people are better at it than others. :)


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ed ­ rader
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Apr 04, 2008 11:35 |  #12

skywalkerbeth wrote in post #5259068 (external link)
ok, so it actually will?

so what are you comparing the 24-105L too? the 300 f2.8....85 1.2....35 1.2?

ed rader


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5D4, 80d, 16-35L III, 24-70L II, 70-200L F4 IS II, 100-400L II, sigma 15mm FE, tc 1.4 III, 430exII, gitzo 3542L + markins Q20, gitzo GT 1545T + markins Q3T, gitzo GM4562

  
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skywalkerbeth
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Apr 04, 2008 12:39 |  #13

my 35mm F1.4 is the comparison point.

OK, so let's say I'm trying to get a great shot of my brother and sis-in-law in front of the cherry blossoms with the 24-105 F4.

It sounds like I want to have them stand FARTHER away from these trees... and use my zoom to zoom in on them (meaning I have to stand farther away, since it's a long zoom?) and set it on F4?


Canon 7D, 30D, G1X Mark II, S90, SD800IS | Canon 35mm 1.4L | Canon 24-105 F4L IS | Polarizers | Canon 100mm F2.8 macro |Lowepro Slingshot 200 | Gitzo 1550T Tripod with 1780qr head | Remote | Diffuser
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JoYork
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Apr 04, 2008 12:41 |  #14

Post #2 nailed it.


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versedmb
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Apr 04, 2008 14:15 |  #15

Get a 5D. ;)

DOF at f/4 on a 5D is like f/2.8 on a 1.6X crop....

In your case though, you should just use your 35L whenever you can!!

24-105 on 5D at f/4....

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How to get nice bokeh/blur with an F4 zoom lens?
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