Guests - If You want access to member only forums on HSO. You will gain access only when you sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
machohorn

What is?

4 posts in this topic

What exactly is "mirror lock-up"? What does it do and more specific how do I do that on my canon xsi? I have read and read my book but it is too vague for me Anyone?

Share this post


Link to post
Share on other sites

Mirror lock-up allows you to lock up the shutter mirror. At normal shutter speeds the mirror doesn't cause enough slap to affect image sharpness, but at slower shutter speeds, when you trip the shutter and the mirror slaps up, it can tremble the camera and cause blurry images. This is most commonly an issue for landscape and macro photographers who are using a tripod and stopping their apertures way down to get the best depth-of-focus possible. This causes slow shutter speeds, thus the tripod, remote shutter release, and MLU to ensure sharp images.

When MLU is engaged, your first trip of the shutter button locks up the mirrow, and you wait a second for your camera to stabilize. Then the second trip of the button opens the shutter to capture the image.

I don't have an XSi manual, but on my other camera manuals if you look in the index under "M" for mirror lock-up, you should find it if your body has that feature. It's generally one of the custom functions.

Share this post


Link to post
Share on other sites

Thanks Steve, next ? do you have it locked up most of the time when you are out and about or do you leave it alone just in case da big bad wolfie appears so as you do not miss that shot and only lock it up when you have the right woods setting?

Share this post


Link to post
Share on other sites

With only one body, I would only lock it up when specific conditions demand it. Because MLU requires two trips of the shutter button to take a picture, there would be off-the-cuff photos lost by leaving it enabled. And burst rate doesn't work with it enabled.

My advice was tailored to people with a single camera body. Generally, when I'm shooting macro or landscape requiring MLU, I've got one body/lens on a tripod with the remote shutter release and I leave it that way going from place to place, because I've got a second body with my telephoto and standard settings in case something develops.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0



  • Posts

    • Just use plain old spray paint in a can. I've done it many many times and seems to stick really nice. Nothing special either I can't even tell you the brand because I have no clue. But as mentioned doing 2-3 light coats helps.
    • no expert here, but heat doesn't rise. heat radiates in the direction of least resistance (R value). warm air or water rises because it is less dense than colder air or water.  If you don't insulate you will be heating the ground under your cabin and the earth is a very large heat sink $$$. get some info from an expert in the radiant field as far as tube diameter, spacing, water temp, manifolds, length of runs, and so on. it varies on amount of windows (solar) ceiling height and room type (bed, bath, living area,  storage etc.). once you pour over the tubing you get to live with it. I did my own Home 15 years ago and got some good advise (wish I would have taken it all)
    • Sonar works from above, cameras need to be submerged. What am I missing here?
    • I've also had good luck spray painting PVC.  Biggest thing I found is to do lots of light coats, the PVC makes the paint want to run in a hurry.
    • I believe you can do this with the Lowrance HDS 9 and above.
    • I'll go with another loss in overtime.
    • Calling a win tonight, it's going to happen!
    •   You'll probably run into plenty of "experts" among the experts, too...   Floor heat is nice, but definitely not the best option if you're looking for the best efficiency, since it is a slow recovery system.  If you were looking for efficiency and lowest cost, I would suggest looking into a mini-split heat pump to complement the gas furnace if you have off-peak available.   (Disclaimer: Not an expert either, but I have stayed at a Holiday Inn Express a few times.)      
    •   Same here. I have 3 of them. Use them in the SUV, Boat, Snowmobile, and Dual Sport bike. They seem to work better on my sled in the winter with no issues at all over my old ifinder which would eat batteries in the cold. They are discontinued but you can still find them out there on the List or bay once in a while. I like them as they are a crossover and can be used on the road or with a lake map which is the main thing I use them for. Wish they would bring something like it back.
    • Ridiculous... but it would work.  Sorry to offend, guess I don't get quite so fired up about concrete.
  • Our Sponsors