Author Topic: Using mirror lock for long exposures  (Read 5597 times)

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Offline asildroca

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Using mirror lock for long exposures
« on: April 16, 2009, 06:21:22 PM »
I read a few of the other threads about mirror lock, which some of you seem to do, but the manual (a100) says not to keep it locked up for long, just a quick cleaning, and that you must use a fully charged battery.  So I ask those of you who do use lockup: just what are you doing?  Ignoring the recommendation of the "short time" use?  I'd love to take some long exposures and minimize any and all chance of shake.  I have a kick-butt tripod and a cable release, so the mirror is my final challenge.

Thanks so much!
~Lisa
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Offline Rob aka [minolta mad]

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Re: Using mirror lock for long exposures
« Reply #1 on: April 16, 2009, 06:30:31 PM »
Hi there,

The mirror lock up option that is talked about in the other threads is only avaliable on the A700 and A900.


Rob

Offline skmalladi

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Re: Using mirror lock for long exposures
« Reply #2 on: April 16, 2009, 06:42:10 PM »
You *could* try to set the two second timer. I have no idea whether or not it'll swing the mirror out of the way at the beginning of the clock or after 2 seconds are up, though.
Sashi

Bluebear

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Re: Using mirror lock for long exposures
« Reply #3 on: April 16, 2009, 07:11:04 PM »
The mirror lock up option that is talked about in the other threads is only available on the A700 and A900.

I have wanted to use mirror lockup on my A700 but not been able to work out how!!  I might have missed it in the manual - it's a while since I read it!  Any prompts anyone?

Offline Stef.

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Re: Using mirror lock for long exposures
« Reply #4 on: April 16, 2009, 07:54:37 PM »
2 sec self-timer is mirror lock up.
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Offline Steve Means No

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Re: Using mirror lock for long exposures
« Reply #5 on: April 16, 2009, 08:01:21 PM »
I'm fairly sure the A100 does have MLU, because I was considering buying one last year to try it with macro. Stef persuaded me to save up for an A700 though! It's a shame Mrs Means No won't let me buy one.

That said, I've read that MLU isn't so useful for long exposures, since any vibration caused by the mirror mechanism becomes less significant as exposure time increases; the fraction of the exposure time affected by vibration gets smaller.
I suppose the critical consideration is the definition of long exposure. I'd imagine once you were over a couple of seconds, it wouldn't matter.

EDIT: and there you go - Stef. herself comes up with the goods while I'm scribbling.

Offline Rob aka [minolta mad]

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Re: Using mirror lock for long exposures
« Reply #6 on: April 17, 2009, 04:44:35 PM »
2 sec self-timer is mirror lock up.
Stef.

Is that true of the A100 as i was under the impression that it was jsut a two second timer where you press the shutter, two seconds later the mirror flips up and the curtain opens and the picture is taken (one action) where wit the A700 you press the shutter, the mirror flips up two seconds later the curtain opens and the picture is taken ???


Rob

Offline Stef.

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Re: Using mirror lock for long exposures
« Reply #7 on: April 17, 2009, 07:23:13 PM »
Have been trying to find my manual for the last 20 minutes- gave up... here is a link that confirms what I said about the 2s self-timer and mirror lock up function:

http://www.dyxum.com/dforum/forum_posts.asp?TID=43920&KW=mirror&title=helpspan-classhighlightmirror-span-lock-up-in-a100

http://forums.cnet.com/5208-7593_102-0.html?threadID=303538

And here is a bit more about the A100- look at the conclusion:
http://www.imaging-resource.com/PRODS/AA100/AA100A.HTM

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Offline asildroca

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Re: Using mirror lock for long exposures
« Reply #8 on: April 17, 2009, 07:42:18 PM »
Fabulous!  Thanks everyone.  I had no idea the 2-second timer worked that way.  Can I assume the 10-second works the same way?  I often used the 10 timer even with my tripod because my old tripod could potentially move a bit when I released the shutter.  Now I have a much nicer tripod that doesn't have that difficulty.

And thanks, Stef, for all the research and links!

~Lisa
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Offline Rob aka [minolta mad]

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Re: Using mirror lock for long exposures
« Reply #9 on: April 17, 2009, 08:51:27 PM »
Can I assume the 10-second works the same way? 

The 10 second timer is purley just a 10 second delay before taking the picture (no MLU). Unless Stef is going to correct me on that ;-)

Thanks for the info Stef, wasnt aware of that. I wonder why Sony didnt implement it on the A200/300/350 etc ???


Rob


Offline Stef.

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Re: Using mirror lock for long exposures
« Reply #10 on: April 18, 2009, 02:29:30 AM »
Can I assume the 10-second works the same way? 

The 10 second timer is purley just a 10 second delay before taking the picture (no MLU). Unless Stef is going to correct me on that ;-)

Thanks for the info Stef, wasnt aware of that. I wonder why Sony didnt implement it on the A200/300/350 etc ???


Rob


Exactly as Rob says- yep that was a mistake from Sony's side and I know of some people who looked for a second hand A100 instead of going for the A200 exactly because of the mirror lock up function... bummer.
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