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Thread: Samyang 8mm

  1. #1

    Default Samyang 8mm

    Hi guys,

    I just got this new baby today and here's a quick test shot. I was having fun but was a bit disappointed when I zoomed in to take a peak at 100%. It would seem like my 18-55 kit lens could've done better. I focused to infinity and I'm using f8 and I'm using a 550D. The other pictures I took were 'soft' too. Should I return the lens? The reviews so far is that this lens has superb optics and is super sharp from f8-11. Kindly advise.

    1.



    100%


    P.S. I understand the photos are a bit under exposed.

    Heres another test shot:

    2.



    100%

    Last edited by jreamer; 7th November 2011 at 05:24 PM.

  2. #2
    Moderator daredevil123's Avatar
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    Default Re: Samyang 8mm

    Please note that on Samyang lenses, focusing to infinity is not turning it all the way until it stops. You have to turn back slightly.

  3. #3

    Default Re: Samyang 8mm

    thanks for the tip. i'll give it another go.

  4. #4

    Default Re: Samyang 8mm

    Great lens - samyang 8mm , - i own one


    To check if your focus ring is correct you should use full aperture.
    You should have full sharpness from 0.5meter to infinity by focusing at 1 meter.


    maybe it your first time to manual Lens -

    here a comparsion of 8mm by tomcat : http://www.clubsnap.com/forums/revie...x-fisheye.html
    Last edited by dis28; 7th November 2011 at 08:57 PM.

  5. #5

    Default Re: Samyang 8mm

    Yes. it is my first time using a manual lens. but apart from focusing at infinity and using f8 what else can I do to get a sharp image at 100%?

    Are ur images sharp when u zoom in at 100%?

    Could you perhaps elaborate what you think was wrong with my settings because I dont see what other settings I can meddle with apart from adjusting the focusing ring and setting the aperture?

    Many thanks

  6. #6

    Default

    I would suggest TS to read up on this topic called Hyperfocus distance and scale.

    If this 8mm manual focus is TS's first MF lens, I would suggest him / her to get a AF confirmation chip installed. But of course, that would not be 100% accurate at times.

    Under exposed or Over exposed, it is not the lens that is faulty or the camera body that malfunction. This is because it is strictly a manual lens. Using AV mode or auto exposure may not be 100% accurate compared to your 18-55. I would suggest you to use bracketing.
    Think fast, aim for the best !

  7. #7

    Default Re: Samyang 8mm

    thanks for your reply.

    I understand the concept of hyperfocal length and that is why i'm even more frustrated because I understand that with 8mm and f/8, there is a very short near focus limit and sharpness that extends to infinity. my pictures though, yield less than desirable sharpness when I crop at 100%.
    Last edited by jreamer; 7th November 2011 at 09:12 PM.

  8. #8
    Moderator daredevil123's Avatar
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    Default

    Quote Originally Posted by jreamer
    thanks for your reply.

    I understand the concept of hyperfocal length and that is why i'm even more frustrated because I understand that with 8mm and f/8, there is a very short near focus limit and sharpness that extends to infinity. my pictures though, yield less than desirable sharpness when I crop at 100%.
    If you are using hyperfocal distance, you shouldn't be using infinity focus.

    Btw I don't have the 8mm but I do have the 14mm. And it is tack sharp even at 100%.

  9. #9
    Moderator Octarine's Avatar
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    Default Re: Samyang 8mm

    Haven't checked .. but if the 550D has LiefeView you could use this option to verify your focus. Works perfect for me with all manual lenses.
    EOS

  10. #10

    Default Re: Samyang 8mm

    Well i realised focusing at infinity was sharper than at the hyperfocal distance of 0.43m (8mm, f8, 550d apc sensor). Could be a manufacturing defect. should be returning the lens.

  11. #11
    Senior Member albertri's Avatar
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    Default Re: Samyang 8mm

    I have this lens but Sony mount my copy is sharp at hyperfocal or infinity... but normally i shoot around .45-.7m I find this is the sweet spot.
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