Mirror Lockup

jockwav

jockwav

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James (Retired)
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What is your opinion on this,does liveview do the same as MLU as a few people have mentioned to me or not.:)
 
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Personally, I never use LiveView as I work in
tethered sessions. That said, I use MLU very
often though always woking with mounting rail
in studio for product photography, macro multi-
ple slices shoots for stacking and architecture
on location etc.
 
In order for liveview to work the mirror has to lock up so technically they do the same thing but for potentially different reasons.....unless im missing something really obvious here :thinking:
 
Thanks guys,i think they do the same job is what i have always kinda thought.
I am thinking in terms of using it like slow shutter speed with nd filters for beach & river shots.:)
I am starting to love using my big stopper which i bought a couple of years ago but never used it up until last week,loving it.:):D
 
For LE work the main point of using live view is to avoid mirror slap which may induce camera shake and show unwanted movement in the shot.
 
As i was told mirror slap can show up on exposure up to around 10 sec exposure
 
Ha - I wouldn't normally consider 10s a 'long' exposure :D

There is a potential of course, but I've never seen it at a whole range of exposures and the longer they are the less effect it can have, especially if wider lenses are used as it 'hides' movement more

Crappy tripods, wind, even light wind blowing camera straps are all more likely to be a problem

I recall shooting some 30s exposures on a bridge that clearly bounced a bit as people walked by, I tried for ages to get a period when no-one walked across and finally got a few. When comparing the 'still' with the 'bouncy' ones later even at 100% I couldn't tell a difference

Dave
 
jockwav said:
told mirror slap can show up on exposure up to around 10 sec exposure
Click to expand...


… yes, it is always there but in a long exposure
it is almost invisible.

Just think that some long exposures are made
of monuments where you don't want to see the
tourists passing by!
 
Thanks for that Dave,maybe i shouldn,t listen to some of the know it alls i meet out there.:):D
 
Thanks Kodiak,maybe your right.:)
 
jockwav said:
Thanks for that Dave,maybe i shouldn,t listen to some of the know it alls i meet out there.:):D
Click to expand...

That includes me of course - take pretty much all advice with a pinch of salt, test where you can :)

I read an article in the RPS Journal recently about exposures of 90s or more where the guest writer was advocating mirror lock-up and using a separate release so as not to jolt the shutter button - but come on - 90 or more seconds !!! If you work it out pretty much NOTHING at all records in those first 5-10 seconds so unless you use a hammer on the shutter button quite how it could still be vibrating 5-10s later is beyond me :D

Dave
 
That,s what i always thought,doubting myself here.:):D
 
DG Phototraining said:
Ha - I wouldn't normally consider 10s a 'long' exposure :D

There is a potential of course, but I've never seen it at a whole range of exposures and the longer they are the less effect it can have, especially if wider lenses are used as it 'hides' movement more

Crappy tripods, wind, even light wind blowing camera straps are all more likely to be a problem

I recall shooting some 30s exposures on a bridge that clearly bounced a bit as people walked by, I tried for ages to get a period when no-one walked across and finally got a few. When comparing the 'still' with the 'bouncy' ones later even at 100% I couldn't tell a difference

Dave
Click to expand...

This is a good post, speaking from experience rather than accepted theory. The reality is where longer exposures are used with a reduced intensity of light being 'burnt' onto the sensor at any given moment then a small one of movement will not show up.

Obviously it is still good practice at any time to use good technique but there is a length of exposures that are more critical than others to movement. Obviously very short exposures (fast shutter speeds) can be faster than the movement so record a frozen picture. The much longer exposures can average out the unmoved pixels against the momentary vibration. It is exposures in the middle from tenths, or hundredths of a second (depending on lens and technique) up to 10-20 seconds that require a stable platform the most.

Liveview is better than mirror lock up and a short timer though in my opinion for most situations because the mirror does have plenty of time to settle whilst you look at the screen, but the response is then immediate. Also, when you disable live view and go to take a quick shot you won't get caught out by having mirror lock up on, a situation we call mirror cock up!
 
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