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  1. #21
    Quote Originally Posted by MartyG View Post
    Along with the focal length of the lens there is the lens aperture, think of this as your iris as aperture and your pupil as the camera sensor - this controls the amount of light entering through the lens which hits the light sensor. At maximum aperture, that is, its widest setting and the smallest f number (biggest pupil, little iris), lots of light gets through, but gives the shallowest depth of field (the amount front to back that's in sharp focus). At the minimum aperture, that is, it's narrowest setting and the largest f number (tiny pupil, large iris), little light gets through, but you get a bigger depth of field.
    I think these two pictures shows what MatyG is talking about. Both were taken with the same focus, same camera, same place. The only thing that was change was the aperture. As you can see, the top image is by far the best. I just hope I have labelled them the right way around.




  2. #22
    Cheers for the advice guys - the 450D is now on hold at the shop. Just waiting for a client to pay me (the joys of being self-employed!) and then I'll go and pick it up, hopefully on Friday.

  3. #23
    Quote Originally Posted by Yakumo View Post
    I just hope I have labelled them the right way around.
    That's fine, it does take a while to realise Max and Min are opposite to the actual numbers

    Here's one I did a few years back

    f/1.4



    f/2.5



    f/4.5



    f/7.1



    f/13



    f/22



    Lighting changed a little on it as I forgot I was on ISO3200 for the first few shots!

  4. #24
    Nice demonstration shots. What is Gunness Marmite, though? It's not what I think it is, is it?

  5. #25
    It's just marmite made using the yeast extract from the Guinness brewery, it was a slightly different taste compared to normal marmite.

  6. #26
    Ah, OK. Not what I was thinking. I thought it was a like a "hair of the dog" breakfast for the morning after

  7. #27
    Yep nice shots GT shows DoF perfectly.

    This perhaps belongs in the youtube section but thought I'd drop it here since it's photo (equipment) related.

    http://www.youtube.com/watch?v=LO7rx...ature=youtu.be

    If anyone is interested the DigitalRev channel on there does some pretty good reviews and comparisons etc, real life stuff not just shooting charts and the like.

  8. #28
    Just back from picking up the 450D. No manual included so have downloaded and am reading through it now. Had a quick play and will hopefully be able to take it out tomorrow for some test pictures (weather permitting). Will let you know if I need any help!

    Thanks again for the advice.

  9. #29
    Managed to get out earlier to do a few test shots. Mainly used the camera assisted modes as I'm trying to build up a collection of good images that I can then use the settings of as a basis for experimenting in manual mode.

    Below are a few shots. I'm pretty pleased with the way they came out, although the last one seems a bit overexposed. Looking forward to experimenting more with the settings once I've got a better handle on things.






  10. #30
    That last one looks like a good exposure, the white doesn't look like its clipping anywhere, so you'd have plenty of room to edit.

    The first one is probably a little under exposed, but that might of been intentional to get the sky showing. My experience with that camera would say you probably could of gotten away with a bit more exposure there.

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