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  • Ian
    replied
    Re: Hyperfocal Distance

    Originally posted by David M View Post
    Not really, I suspect you're trying to get the best out of your lenses, even if you're doing it subconsciously.

    Checking Lightroom the vast majority of mine are f5.6 to f8.
    Yes, that's a very sensible range

    Ian

    Leave a comment:


  • Ian
    replied
    Re: Hyperfocal Distance

    Originally posted by maccabeej View Post
    Interestingly the DOFMaster calculator on their site shows 7.91 ft as the hyperfocal distance for 12mm at F4. If you change the camera to an FF like the C****n 1D etc and enter 24mm and F8 you get 7.95ft which is marginally different. I presume, without doing the research and resorting to pythagaros that the diagonals of FF are not exactly 2x 4/3rds or the calculator is internally inconsistent. I have the DOFMaster app on my iphone which I have not yet used in anger so it is worth knowing that it may not be accurate.
    Jim
    There are a lot of approximations in photography arithmetic, so I think this is within the margin of error - it's less than half an inch

    Ian

    Leave a comment:


  • maccabeej
    replied
    Re: Hyperfocal Distance

    Interestingly the DOFMaster calculator on their site shows 7.91 ft as the hyperfocal distance for 12mm at F4. If you change the camera to an FF like the C****n 1D etc and enter 24mm and F8 you get 7.95ft which is marginally different. I presume, without doing the research and resorting to pythagaros that the diagonals of FF are not exactly 2x 4/3rds or the calculator is internally inconsistent. I have the DOFMaster app on my iphone which I have not yet used in anger so it is worth knowing that it may not be accurate.
    Jim

    Leave a comment:


  • ozzie
    replied
    Re: Hyperfocal Distance

    Originally posted by Ian View Post
    By f/8 you are starting to lose resolution through diffraction softening. f/8 is like f/16 on full frame - do you need more depth of field than that? At a moderate wide angle of 18mm, at f/8, the hyperfocal distance is down to 9 feet. At 12mm it's down to 4 feet.

    Ian
    Thanks Ian
    Sounds like I am not even the same ball park. I will start using lower fstop and
    see if things get better. I must admit that I have been happy so far with my images although some are a bit soft and I think you have answered that question for me.
    Thanks again
    John

    Leave a comment:


  • jamie allan
    replied
    Re: Hyperfocal Distance

    Originally posted by snaarman View Post
    Checking with exposureplot I find I am a f8 maniac. The vast majority of my snaps are done at f8 +- 1 stop.

    Creature of habit?

    Pete
    I just tried this for the first time and found that by far I'm
    Focal Length approx 30mm
    Iso 100
    Aperture f6
    Shutter speed 1/80

    Makes you think why we buy all this kit doesn't it?

    Leave a comment:


  • David M
    replied
    Re: Hyperfocal Distance

    Originally posted by snaarman View Post
    Checking with exposureplot I find I am a f8 maniac. The vast majority of my snaps are done at f8 +- 1 stop.

    Creature of habit?

    Pete
    Not really, I suspect you're trying to get the best out of your lenses, even if you're doing it subconsciously.

    Checking Lightroom the vast majority of mine are f5.6 to f8.

    Leave a comment:


  • Graham_of_Rainham
    replied
    Re: Hyperfocal Distance

    Originally posted by jdal View Post
    <snip> I made up a card with focal lengths and f-stops I commonly use for landscape work and had a try out, but something isn't right. <snip>
    I put togeather an XL sheet that produces a chart, by entering the lens details, CofC etc...

    If you want a copy send an e-mail and I'll send you it.

    Leave a comment:


  • snaarman
    replied
    Re: Hyperfocal Distance

    Originally posted by Ian View Post
    By f/8 you are starting to lose resolution through diffraction softening. f/8 is like f/16 on full frame - do you need more depth of field than that? At a moderate wide angle of 18mm, at f/8, the hyperfocal distance is down to 9 feet. At 12mm it's down to 4 feet.

    Ian
    Checking with exposureplot I find I am a f8 maniac. The vast majority of my snaps are done at f8 +- 1 stop.

    Creature of habit?

    Pete

    Leave a comment:


  • Ian
    replied
    Re: Hyperfocal Distance

    Originally posted by ozzie View Post
    I find most of my shots are between F11 and F16 on the 12-60 and mostly F11 on 7-14 and I have always pre focused one third into the scene
    Thanks John
    By f/8 you are starting to lose resolution through diffraction softening. f/8 is like f/16 on full frame - do you need more depth of field than that? At a moderate wide angle of 18mm, at f/8, the hyperfocal distance is down to 9 feet. At 12mm it's down to 4 feet.

    Ian

    Leave a comment:


  • ozzie
    replied
    Re: Hyperfocal Distance

    I find most of my shots are between F11 and F16 on the 12-60 and mostly F11 on 7-14 and I have always pre focused one third into the scene
    Thanks John

    Leave a comment:


  • Ian
    replied
    Re: Hyperfocal Distance

    I
    Originally posted by ozzie View Post
    I have been focusing one third of the way into the scene with all lenses.Will Hyperfocal Distance focus improve the sharpness in my landscapes ?
    Thanks
    John
    It depends on what focal length and aperture you are using.

    Ian

    Leave a comment:


  • ozzie
    replied
    Re: Hyperfocal Distance

    I have been focusing one third of the way into the scene with all lenses.Will Hyperfocal Distance focus improve the sharpness in my landscapes ?
    Thanks
    John

    Leave a comment:


  • Ian
    replied
    Re: Hyperfocal Distance

    Originally posted by sapper View Post
    Not sure if it does.
    If the chart for FF says 24mm lens @ f8 gives a hyperfocal distance of 2.4m would a 4/3 lens at 12mm need f16 give the same hyperfocal distance?
    Halve the focal length and the f-number (not the aperture size) so that gives 12mm @f/4. The hyperfocal distance is about ten and half feet.

    Ian

    Leave a comment:


  • Daveart
    replied
    Re: Hyperfocal Distance

    Originally posted by jdal View Post
    This website looks really good for working out the Hyperfocal Distance, so I made up a card with focal lengths and f-stops I commonly use for landscape work and had a try out, but something isn't right. Here's an example with the E1 and the 12-60.

    Exif: 24mm, F9, so according to the chart the hyperfocal distance should be 4.5 metres.

    The rock in the lower left is about 5 metres away so I focussed on it.
    [ATTACH]510[/ATTACH]

    Here's a 100% crop of the rock:
    [ATTACH]512[/ATTACH]
    Not pin sharp, but ok

    Here's the village in the distance:
    [ATTACH]511[/ATTACH]

    Looks pretty OOF to me, but my understanding is if I focus on the hyperfocal distance, everything from closer than that to infinity should be in focus. Does anyone have any tips/advice/clues?

    Hi John the distant houses could very well be soften by heat haze, couldn't say really about the rock not being in focus though. At f9 with a 24mm lens should have given you most in focus I would say.

    Dave

    Leave a comment:


  • sapper
    replied
    Re: Hyperfocal Distance

    Originally posted by Ian View Post
    Hyperfocal distance basically means focusing on the nearest point where the dof beyond the subject just makes infinity. My articles on Four Thirds and apertures:

    http://fourthirds-user.com/2011/04/a...our_thirds.php

    ..shows that compared to full frame, you will get equivalent full frame DOF by halving the full frame focal length and halving the f-number.

    So you should be able to use that to ready reckon from a full frame chart.


    Hope that helps,

    Ian
    Not sure if it does.
    If the chart for FF says 24mm lens @ f8 gives a hyperfocal distance of 2.4m would a 4/3 lens at 12mm need f16 give the same hyperfocal distance?

    Leave a comment:

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