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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 24 Aug 2011 (Wednesday) 10:18
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Canon EF 100-400

 
whu-1
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Aug 24, 2011 10:18 |  #1

sorry newbie quetions again :D

I’ve bean looking at the Canon EF 100-400mm f/4.5-5.6 USM L IS to go with a 17-55 , 55-250 and a 6od

If you own this lens could you answer a few question for me .


This lens has bean around since 1998 when phone were the size of bricks , well close , has the lens and hence the electronics in side never bean up graded in the last 14 years ?

Can you even get the electronic parts from 14 years a go :oops:

Would ask if its going to be up graded soon but there are threads say announcing next month back in 2006 ……:D

Is this canons oldest zoom ?

Any problems with the 1st generation Image Stabilizing ?

Where is the air sucked in to the lens ?

I’m assuming the dust sucking is bit urban myth on newer copies …………any one experienced this ?

And dumd newbie question as a rule of thumb , focal length of 400 mm is a 50% crop of image taken at 200 mm ?


Cheers ………




  
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Keyan
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Aug 24, 2011 10:33 |  #2

I just used a friend's 100-400 last weekend to shoot the Air and Water show in Chicago.

The IS is version 1, in that it won't auto detect if you are panning or not, there is a mode selection switch to tell it if you are shooting panning or if the camera is stationary. It sucks in and blows out air around the lens barrel. It will cause air to move in any version of the lens. All zooms with moving barrels act in the same way - this one is just exceptionally long and moves a larger volume of air than most lenses. That said, it did not cause any dust issues for me in the camera or the lens.

Yes you are correct on the focal length question.

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Cameras: 7D2, S100
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howiewu
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Aug 24, 2011 10:50 |  #3

whu-1 wrote in post #12990752 (external link)
sorry newbie quetions again :D

I’ve bean looking at the Canon EF 100-400mm f/4.5-5.6 USM L IS to go with a 17-55 , 55-250 and a 6od

If you own this lens could you answer a few question for me .


This lens has bean around since 1998 when phone were the size of bricks , well close , has the lens and hence the electronics in side never bean up graded in the last 14 years ?

Can you even get the electronic parts from 14 years a go :oops:

Would ask if its going to be up graded soon but there are threads say announcing next month back in 2006 ……:D

Is this canons oldest zoom ?

Any problems with the 1st generation Image Stabilizing ?

Where is the air sucked in to the lens ?

I’m assuming the dust sucking is bit urban myth on newer copies …………any one experienced this ?

And dumd newbie question as a rule of thumb , focal length of 400 mm is a 50% crop of image taken at 200 mm ?


Cheers ………

It is an older lens, but not the oldest; the 1st-gen IS is not as good as the latest, but still very effective. It "sucks" air the same way as all other lenses -- through the gap between lens barrels. The push-pull design does not make it suck (in strictly this sense used here) more or less.

Now a 400mm is also similar to a 1/8 crop of a 50mm lens, or 1/20 crop of a 20mm lens, what is your point??


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whu-1
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Aug 24, 2011 10:54 |  #4

cheers for the reply ,

"It sucks in and blows out air around the rear of the lens and through the camera body"

so its not from around the frount lens or the main body ( along were the focal lengh numbers are printed aka were its pumped :-)...............cheers




  
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whu-1
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Aug 24, 2011 11:00 as a reply to  @ Keyan's post |  #5

Now a 400mm is also similar to a 1/8 crop of a 50mm lens, or 1/20 crop of a 20mm lens, what is your point??

well thinking of 70 - 200 f4 and 1.4 ex from time to time and cropping the image .

im only ever going to print out A4 size max never the size of a wall :D




  
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TBG_Dad
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Aug 24, 2011 11:19 |  #6

Keyan wrote in post #12990855 (external link)
The IS is version 1, in that it won't auto detect if you are panning or not, there is a mode selection switch to tell it if you are shooting panning or if the camera is stationary.

I don't think any of the lenses auto detect panning. Stabilizer Mode 1 corrects all vibrations regardless of how the camera is being held. Stabilizer mode 2 corrects in right angles to the cameras movements and, as was mentioned, is meant for panning.




  
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Keyan
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Aug 24, 2011 11:48 |  #7

TBG_Dad wrote in post #12991137 (external link)
I don't think any of the lenses auto detect panning. Stabilizer Mode 1 corrects all vibrations regardless of how the camera is being held. Stabilizer mode 2 corrects in right angles to the cameras movements and, as was mentioned, is meant for panning.

The newest ones do. Ironically this feature exists on the 55-250 IS, the 18-135 IS, etc. Any lens that has IS but no mode selector has auto-detection of camera movement and it will automatically change accordingly.


Cameras: 7D2, S100
Lenses: 17-55 f/2.8 IS USM, 18-135 STM, 24-70 f/4L IS USM, 50 f/1.4 USM,70-300L IS USM
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Keyan
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Aug 24, 2011 11:49 |  #8

whu-1 wrote in post #12990986 (external link)
cheers for the reply ,

"It sucks in and blows out air around the rear of the lens and through the camera body"

so its not from around the frount lens or the main body ( along were the focal lengh numbers are printed aka were its pumped :-)...............cheers

I might be incorrect there. I edited my post, it looks like someone else says it breaths around the barrel.


Cameras: 7D2, S100
Lenses: 17-55 f/2.8 IS USM, 18-135 STM, 24-70 f/4L IS USM, 50 f/1.4 USM,70-300L IS USM
Other Stuff: 430 EX II, Luma Labs Loop 3, CamRanger

  
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TBG_Dad
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Aug 24, 2011 13:01 |  #9

Keyan wrote in post #12991275 (external link)
The newest ones do. Ironically this feature exists on the 55-250 IS, the 18-135 IS, etc. Any lens that has IS but no mode selector has auto-detection of camera movement and it will automatically change accordingly.

... but not on the 70-200 mkII.

interesting to know. Both of the lenses you mentioned are ef-s. Auto-panning detect isn't a standard feature on any of the L lenses, that I know of. They all have the mode switch.




  
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TBG_Dad
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Aug 24, 2011 13:07 |  #10

whu-1 wrote in post #12990986 (external link)
so its not from around the front lens or the main body ( along were the focal lengh numbers are printed aka were its pumped :-)...............cheers

from the front element? no
the main body where the focal numbers are printed? yes
the rear element? yes, some of the air will go through here when pumped.

keep in mind, your not trying to build a charge in a water pistol. air flow is minute but it is there




  
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krb
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Aug 24, 2011 13:27 |  #11

Keyan wrote in post #12991275 (external link)
The newest ones do. Ironically this feature exists on the 55-250 IS, the 18-135 IS, etc. Any lens that has IS but no mode selector has auto-detection of camera movement and it will automatically change accordingly.

The above is not correct. For example, the 24-105L does not have a mode selection switch and it only operates in Mode 1. While doing a Google search to confirm this I found a post on another forum by Chuck Westfall from back in '07 where he said that any lens that does not have a mode switch only operates in mode 1.

There are some newer lenses that can automatically select the panning mode, but as stated above they are all EF-S lenses. On all L lenses that support Mode 2, Canon includes a switch so that the photographer can make the decision about which mode is used rather than letting the camera/lens take a guess at what is correct.


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Madweasel
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Aug 24, 2011 13:38 |  #12

whu-1 wrote in post #12990752 (external link)
...Can you even get the electronic parts from 14 years a go :oops:

The 14-year old design does not mean all of the components in a new lens are 14 years old. If it is still being manufactured, then of course parts are available.


Mark.

  
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whu-1
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Aug 24, 2011 21:24 |  #13

If it breath around barrel , you can see how dust can get sucked in , and the blown on to the sensor etc .

If you own this lens is it a problem or pritty much a myth ?




  
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TeamSpeed
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Aug 24, 2011 21:32 |  #14

Way too much worry about dust. It is a fact of life, it will end up on your sensor and in the lens. Nothing worrying about, the sensor can be blown off with a Giottos or wet-cleaned, and the dust in the 100-400L won't have an impact on images. Great lens, get it if you can.


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bob_r
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Aug 24, 2011 21:44 |  #15

I've been shooting in very dusty conditions with mine at least once a week for the last few years and haven't had any problems.

Here's a sample pic - notice all the sand being kicked up (and it gets worse in the summer).
30D - 100-400 - 1/640s f/5.6 at 235.0mm iso200

IMAGE: http://www.pbase.com/bob_r/image/122293193.jpg


Here's one taken in the summer just to show the dust.
IMAGE: http://www.pbase.com/bob_r/image/136425605.jpg

Canon 7D, 5D, 35L, 50 f/1.4, 85 f/1.8, 135L, 200L, 10-22, 17-55, 70-300, 100-400L, 500D, 580EX(2).
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