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Thread started 15 Mar 2005 (Tuesday) 23:10
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Canon EF 100-400mm f/4.5-5.6L IS USM - AKA The Dust Pump

 
KayakPhotos
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Jan 18, 2012 15:02 as a reply to  @ post 13724080 |  #5371

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mmackwan
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Jan 18, 2012 15:23 |  #5372

taken yest with 7d and 100-400mm


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T2i4me
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Jan 18, 2012 15:33 |  #5373

rogertb wrote in post #13724080 (external link)
Same as me really though I don't generally carry my monopod around (mainly 'cause I have a dog on a lead some of the time and I run out of hands - I know a dog is not really helpful when birding but it seems a shame to go out without her) ... anyway, to the point; I did some moon shots recently and noticed no difference between those with IS on and those with it off but it wasn't a scientific test and I have read lots of people on various forums (or is it 'fora') suggest that it's a good idea.

I read an interesting comment by a member of POTN recently where he said that he'd stopped trying to solve his problems by spending money on new 'kit' and was just going to try and improve his 'technique' - I think it's a very good point !

Roger

I took a couple shots last night with my 100-400 on a tripod, it was of a car license plate that was a good 150 yards down the street. I left IS on for one shot and off for the other, the shot with it off was sharper. So there might be something to this.


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Jan 18, 2012 15:37 |  #5374

MATT0404 wrote in post #13698945 (external link)
A shot from today. Anyone know birds and can help with ID of this guy?

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IMG_2571 (external link) by mkrepp (external link), on Flickr

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mmackwan
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Jan 18, 2012 20:34 |  #5375

Todays pictures bit overcast...


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RAW-Shooter
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Jan 18, 2012 21:59 |  #5376

T2i4me wrote in post #13727215 (external link)
I took a couple shots last night with my 100-400 on a tripod, it was of a car license plate that was a good 150 yards down the street. I left IS on for one shot and off for the other, the shot with it off was sharper. So there might be something to this.

If you read the instructions, which came with the lens, you even get it in writing:
Turn IS OFF when using a tripod.

BTW, you can use IS (mode 2) on a monopod if you know you will be panning a lot, like for motor sport.

Regarding birding: I find that @ 400mm the best results can be achieved at f8. If light is an issue and you have to use f5.6 pull back to about 380mm.

One other thing. Something I did not realize for a loong time. Birds - the smaller they are the more erratic they move. Take the time to sit in your backyard and just watch these guys. Even if they just tilt the head, it's not a smooth movement as we are all used to see with human motion. It goes left right in a blink of an eye.

If you hit the shutter button just when they move even a 1/1600 is too long.

One more thing. Don't use high speed shooting (x frames a sec) on IS mode 1. In my opinion this IS generation has a hard time keeping up. If your camera supports 2 high speed shooting modes, pick the slower one.

HTH.


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T2i4me
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Jan 18, 2012 23:33 |  #5377

Good points, thanks. I bought my lens used and it did not come with the instructions, guess I should have consulted the Canon website but have not had that issue with my other IS lenses.


-- Eric --
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Jan 18, 2012 23:37 |  #5378

RAW-Shooter wrote in post #13729376 (external link)
If you read the instructions, which came with the lens, you even get it in writing:
Turn IS OFF when using a tripod.

BTW, you can use IS (mode 2) on a monopod if you know you will be panning a lot, like for motor sport.

Regarding birding: I find that @ 400mm the best results can be achieved at f8. If light is an issue and you have to use f5.6 pull back to about 380mm.

One other thing. Something I did not realize for a loong time. Birds - the smaller they are the more erratic they move. Take the time to sit in your backyard and just watch these guys. Even if they just tilt the head, it's not a smooth movement as we are all used to see with human motion. It goes left right in a blink of an eye.

If you hit the shutter button just when they move even a 1/1600 is too long.

One more thing. Don't use high speed shooting (x frames a sec) on IS mode 1. In my opinion this IS generation has a hard time keeping up. If your camera supports 2 high speed shooting modes, pick the slower one.

HTH.

I really wish this lens was sharper. Seem like no matter what I do everything looks matted. I have the newer generation which I'm told is better but still. I'm going to rent a 500mm for an airshow in the summer and try not to love it...the price tag is insane lol.


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rogertb
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Jan 19, 2012 02:11 |  #5379

RAW-Shooter wrote in post #13729376 (external link)
One more thing. Don't use high speed shooting (x frames a sec) on IS mode 1. In my opinion this IS generation has a hard time keeping up. If your camera supports 2 high speed shooting modes, pick the slower one.HTH.

Good point ... it's so tempting to shoot like that for bif but, of course, IS can't possibly keep up with it. I must admit to not really knowing quite how IS works, if you're wiggling the camera around trying to follow a bird and (I use back focus) holding the back focus button down to keep the bird in focus and hitting the shutter I guess the IS isn't going to work at all.

Again must try and do some tests.

Roger


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Jan 19, 2012 10:56 |  #5380

Well IS will be working - but probably not effectively. IS will engage with either the shutter button or the back button AF. Honestly I just leave it on and my hit rate for BIF is about the same with IS turned off. I haven't found a significant difference. I guess one can say I suck equally well with it on or off :p


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Jan 19, 2012 14:25 |  #5381

jase1125 wrote in post #13731913 (external link)
I guess one can say I suck equally well with it on or off :p

Splendid ... nice to get some realistic and real world comments ... I like this thread ... Roger


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Jan 19, 2012 15:57 |  #5382

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jwcdds
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Jan 20, 2012 01:53 |  #5383

Skies weren't clear, had to shoot through some mist/light clouds. Used the 2x III.

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Jan 20, 2012 05:17 |  #5384

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Jan 20, 2012 06:10 |  #5385

jwcdds wrote in post #13736194 (external link)
Skies weren't clear, had to shoot through some mist/light clouds. Used the 2x III.
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Could you share what i'm looking at? I dont know much about planets and such.


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Canon EF 100-400mm f/4.5-5.6L IS USM - AKA The Dust Pump
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