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12mm lenses...too wide?

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  • Harold Gough
    replied
    Re: 12mm lenses...too wide?

    Originally posted by Harold Gough View Post
    The Magic Shift Adapter (Nikon a.i.) is about to be dispatched to me from China.
    It has new arrived and I have started playing with it. See my initial findings in the Converters, etc. section.

    Harold

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  • Harold Gough
    replied
    Re: 12mm lenses...too wide?

    Originally posted by Harold Gough View Post
    What you don't get is any variation in parallax as the lens rotates.

    The Laowa 12mm is the only lens, which has passed through my hands, which has the position of the entrance pupil marked. (It is about 2mm in front of the focusing ring).
    The Magic Shift Adapter (Nikon a.i.) is about to be dispatched to me from China.

    Harold

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  • OM USer
    replied
    Re: 12mm lenses...too wide?

    A better example would be a picture of the infamous brick wall. An ultra wide rectilinear lens would show the line of the bricks being horizontal and vertical along all four sides of the photo. Take 2 shots of the same wall with a lens with a higher focal length, pointing the lens at the middle of each half of the wall. As the lens will not be perpendicular to the wall you will get perspective distortion (in this case conventional parallax) with the sides of the wall being smaller than the join in the middle. Easily corrected with the same amount (but opposite) keystone correction on a two photo stitch but on a three or more stitch you would need to stitch first, then split into two for the correction. With a stitched panorama of scenary it is not so obvious if the major elements of the composition are some way away but even a shot looking down on a straight road will end up with it looking curved as it tails off into the distance.

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  • Harold Gough
    replied
    Re: 12mm lenses...too wide?

    Originally posted by Petrochemist View Post
    If you are rotating the camera & lens around the nodal point you won't get any perspective distortion from stitching.
    What you don't get is any variation in parallax as the lens rotates.

    The Laowa 12mm is the only lens, which has passed through my hands, which has the position of the entrance pupil marked. (It is about 2mm in front of the focusing ring).

    Harold

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  • OM USer
    replied
    Re: 12mm lenses...too wide?

    Originally posted by Petrochemist View Post
    If you are rotating the camera & lens around the nodal point you won't get any perspective distortion from stitching.
    Actually you will on any camera rotation as the focal plane for each shot will be different from each other and different from the focal plane of a very wide angle rectilinear lens (even though the latter would have some continuous curvature to it). Imagine a sequence of shots, taken from the ground, going up a tall building - the converging verticals would be a series of lines at different angles. I prefer to put on a 7mm, point it horizontal, and crop off the bottom half.

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  • Harold Gough
    replied
    Re: 12mm lenses...too wide?

    Originally posted by OM USer View Post
    I often shoot at 12mm and sometimes needed a bit more which is why I now have the 7-14mm. There are occassions when you just can't step back and still take the picture you want, either due to crowds or the size of the subject (tall buildings, trees etc). Stitching is not an option if it will introduce perspective distortion.
    The images with my 7.5mm were from within arm's reach of the bumper.

    Harold

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  • Petrochemist
    replied
    Re: 12mm lenses...too wide?

    Originally posted by OM USer View Post
    Stitching is not an option if it will introduce perspective distortion.
    If you are rotating the camera & lens around the nodal point you won't get any perspective distortion from stitching.

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  • OM USer
    replied
    Re: 12mm lenses...too wide?

    I often shoot at 12mm and sometimes needed a bit more which is why I now have the 7-14mm. There are occassions when you just can't step back and still take the picture you want, either due to crowds or the size of the subject (tall buildings, trees etc). Stitching is not an option if it will introduce perspective distortion.

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  • Harold Gough
    replied
    Re: 12mm lenses...too wide?

    I have just posted some car images from the Laowa 12mm in Foto Fair.

    Harold

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  • shenstone
    replied
    Re: 12mm lenses...too wide?

    I still think they can be convenient and they can produce useful results

    I had a picture used on a book cover (wrap around) that was taken with my 7-14 at 7mm and the publisher was very happy with the quality. yes if you pixel peep in corners there is a slight amount of distortion but unless you get a magnifying glass out on the book you are not going to see it

    It is less fuss than stitching
    I can see it in camera

    So I'll keep using mine when i feel like it

    Regards
    Andy

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  • Graham_of_Rainham
    replied
    Re: 12mm lenses...too wide?

    With "sweep panorama", in camera stitching etc., wide and ultra wide lenses are not needed unless you want the effect that you get from these lenses.

    I find myself using the W/UW a lot less than I did.

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  • alfbranch
    replied
    Re: 12mm lenses...too wide?

    Originally posted by pdk42 View Post
    Ah - in which case I agree. I think 12mm is too wide for this sort of thing. The Panasonic 15mm (or 14mm) would be better. I use the 17mm for that sort of photography and that usually works too.
    I would say the 17mm would be my choice which is about the same as fixed lens compact would have generally.


    Sent from my SM-G930F using Tapatalk

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  • iso
    replied
    Re: 12mm lenses...too wide?

    Harold '''Quote:: I obtained a Pentax 15mm of good reputation. All of these are rectilinear.

    Harold - yes a true rectilinear is the best, IMHO. I think I have got one to sell if anyone is interested?

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  • pdk42
    replied
    Re: 12mm lenses...too wide?

    Originally posted by Loup Garou View Post
    But I sometimes go around with a wide-angle lens during parties, family gatherings and such where a 'standard' lens such as the 25mm might be a bit narrow if you want to include several people in the frame, which is often the case with my lot. I should have clarified my point - what I really meant was that to use as a "general purpose wide-angle lens" (if there is such a thing), I found that 15mm is more practical than 12mm.
    Ah - in which case I agree. I think 12mm is too wide for this sort of thing. The Panasonic 15mm (or 14mm) would be better. I use the 17mm for that sort of photography and that usually works too.

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  • Loup Garou
    replied
    Re: 12mm lenses...too wide?

    I have the Olympus 7-14mmtoo but as it is a large, heavy lens, I keep it for planned landscape, cityscape and such photography. But I sometimes go around with a wide-angle lens during parties, family gatherings and such where a 'standard' lens such as the 25mm might be a bit narrow if you want to include several people in the frame, which is often the case with my lot. I should have clarified my point - what I really meant was that to use as a "general purpose wide-angle lens" (if there is such a thing), I found that 15mm is more practical than 12mm.

    Leave a comment:

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