40D Live View

Discussion in 'Photography Equipment & Products' started by keith204, Sep 7, 2007.

  1. keith204

    keith204 No longer a newbie, moving up!

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    Just wanted to post a brief review on it here.

    It's not as cheesy as I had imagined. Some were concerned that the display didn't tilt/rotate, but it doesn't really need to. The viewing angle is almost 180degrees in all directions. I can literally have it an inch from the wall, and still see what I'm shooting.

    Live histogram is sort of nice, though I still don't fully understand how to use it :D

    But, all in all, I think this 'live view' is neat. I probably won't use it much as I prefer the viewfinder, but I could see my wife, and other people using it. Now, I can't get the response..."oh, you have to look through the thingy to see what you're doing? that's old fashioned... my 50$ easyshare lets you look at the display..."
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    One thing that I am curious about...is sensor heat. Normally, the sensor in a DSLR only sees any light during the exposure...but with live view, it's getting light constantly...which means that it's constantly 'ON'. It might build up some heat, which could lead to noise or dead pixels. That's what I've heard, anyway.
     
  3. sabbath999

    sabbath999 No longer a newbie, moving up!

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    Thanks for the review.

    I think, personally, that I would only turn live view on when I needed it (shotgun shooting above my head, at arms length through a fence, etc.), but I can see where it would be VERY handy.

    Mike, interesting thought you have there... is that a problem for P&S's that have the sensor on all the time (creating dead pixels)?
     
  4. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    I'm not certain if that's a problem with digicams or not. Maybe it has something to do with the size of the sensor and conversely the amount of electricity required. I do know that it has been an issue with DSLR camera and long exposures...so I would assume that live view could suffer the same problems.
     
  5. lostprophet

    lostprophet No longer a newbie, moving up!

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    Canon have an auto shut off on live view when the sensor gets too hot
     
  6. Liveview does not get its feed off the sensor that it uses to capture the image - I don't fully understand how, but my understanding is that it's a different sensor.

    ...but I could be wrong. After all, what would be the point of raising the mirror if it didn't use the primary sensor.

    Anyone?
     
  7. soylentgreen

    soylentgreen TPF Noob!

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    My understanding was that it does use the main sensor. Why else have the mirror lock up? Its not to be used like a point and shoot style live view though. Since it is a CMOS and not a CCD, it will just heat up and drain too much battery power. It's "Live" attribute is kinda slow for real-time. I have been using it more for fine focusing on macro's, low-angle shots, etc. The camera has to be pretty stable to keep the sensor from constantly refreshing. Wasn't a feature I was too sold on anyway so was not a biggy.
     
  8. jstuedle

    jstuedle No longer a newbie, moving up!

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    Don't know about the Canon version, but I was under the impression the new Nikon's had a secondary sensor behind the mirror. Might be wrong, usually am till I have it in my hands.
     
  9. End Game

    End Game TPF Noob!

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    God I wish my 400D had a LiveView
     
  10. Chas

    Chas TPF Noob!

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    I was planning on using Live View for taking shots in a light aircraft, where use of the viewfinder is a bit of a pain while trying to control the bird in a bit of turbulence (or when banked to get that perfect angle). I'll report on success or otherwise in due course. But LV isn't a biggie for me, I doubt I'll use it much otherwise. I didn't even know about live histogram - now that is pretty cool (in theory, anyway).
     
  11. soylentgreen

    soylentgreen TPF Noob!

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    Just be careful Chas, there is a huge warning not to point the exposed sensor towards the sun or bright lights while in Live-View mode.
     
  12. End Game

    End Game TPF Noob!

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    Soy's right, I actually did that once with another camera, not the 40D, and the image burn lasted for hours. It can really ruin it. If you do it longer than a few seconds, it can last days.
     

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