July 31, 2014, 03:13:34 PM

Author Topic: IS, Tripod,Live view and my confusion....  (Read 564 times)

Dholai

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IS, Tripod,Live view and my confusion....
« on: May 17, 2014, 11:04:53 AM »
...Please educate me.

The 600 mm with 1.4 X is on the tripod. IS is ON.

Looking through the viewfinder, image is shaking and becomes stable when shutter is half pressed engaging the IS.

I switch to live view, magnify the image to the max for precise focusing.
Image is stable- I press the shutter halfway , the IS engages, the image starts shaking !!! I switch the IS off, press the shutter, image remains stable.

Which one is to believe ?? What is the correct technique to get a sharper image?
Where to read about it ??

Thanks

Dholai

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IS, Tripod,Live view and my confusion....
« on: May 17, 2014, 11:04:53 AM »

richro

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Re: IS, Tripod,Live view and my confusion....
« Reply #1 on: May 17, 2014, 01:57:43 PM »
Turn IS off when mounted on tripod.
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9VIII

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Re: IS, Tripod,Live view and my confusion....
« Reply #2 on: May 17, 2014, 02:53:49 PM »
The IS system is always looking for movement, if there is none it just starts to spaz out.
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Dholai

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Re: IS, Tripod,Live view and my confusion....
« Reply #3 on: May 17, 2014, 05:29:07 PM »
Thanks tyo both of you.

But.. you are missing my point. Please read the post . Why is the difference in observation of Image shaking in these 2 scenarios??

BTW, Aren't the latest IS lenses tripod sensing ? Dont they switch off automatically when they are mountd on  a tripod?

Thanks

Dholai

richro

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Re: IS, Tripod,Live view and my confusion....
« Reply #4 on: May 17, 2014, 05:44:46 PM »
I don't know the answer for sure, but maybe it has to do with the the different AF mechanisms between viewfinder and live view.

Either way, it's a moot point. Canon recommends turning off IS when mounted on tripod. This will resolve the shaking you see.
650D | 18-135 STM | 55-250 STM | 35/2 IS | 50/1.8 II | 60/2.8 Macro
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tolusina

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Re: IS, Tripod,Live view and my confusion....
« Reply #5 on: May 17, 2014, 05:59:18 PM »
Best to trip the shutter with the 10 second self timer or a remote, wired, wireless or tethered.
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neuroanatomist

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Re: IS, Tripod,Live view and my confusion....
« Reply #6 on: May 17, 2014, 06:35:42 PM »
Turn IS off when mounted on tripod.


The IS system is always looking for movement, if there is none it just starts to spaz out.


The IS systems of all but the oldest lenses sense when the lens is on a tripod, and disable themselves.  The supertele lenses go a step further, and activate a secondary IS mode that damps mirror/shutter vibrations. 

So, with a supertele you're better off leaving IS on when mounted on a tripod. Do keep in mind that the IS system needs ~0.5 s to stabilize the image – if you just mash the shutter release, that's worse than leaving IS off.

Leaving IS on doesn't affect sharpness, at least based on some limited testing I've done.  See this post, scroll down for results from the 600/4L IS II.

I haven't used live view much with my 600 II, but I do leave IS on when on a tripod, and I don't recall any issues, provided the IS is allowed to operate for a brief period (sometimes there's an initial 'jump' then a 'drift' as it settles).

Question for the OP - which IS mode is set on the lens?
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Re: IS, Tripod,Live view and my confusion....
« Reply #6 on: May 17, 2014, 06:35:42 PM »

richro

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Re: IS, Tripod,Live view and my confusion....
« Reply #7 on: May 17, 2014, 08:59:29 PM »
I stand corrected. Did not know about Canon's tripod-sensing IS. Looks like your 600L should have it, unless it's not sensing properly for some reason. You could try mirror lock and shutter delay to see if that helps.
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EOS M | 22/2 | 11-22 | 18-55 | EF Mount Adapter

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Re: IS, Tripod,Live view and my confusion....
« Reply #7 on: May 17, 2014, 08:59:29 PM »