Only 100x: Mitakon 135mm f1.4 lenses for Nikon F

Discussion in 'Photography Equipment & Products' started by Solarflare, Oct 20, 2015.

  1. Solarflare

    Solarflare No longer a newbie, moving up!

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  2. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    It would be very cool if the optical performance (sharpness, colour rendition, etc) lives up to the price tag, but it strikes me as odd that it only has an 11 blade diaphram. I don't see that as rendering the really creamy bokeh I'd expect out of a lens like this.
     
  3. goodguy

    goodguy Been spending a lot of time on here!

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    Very interesting but one piece of info I couldnt find so excuse me for the stupid question....is this lens MF or AF ?
     
  4. Derrel

    Derrel Mr. Rain Cloud

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    It is a manual focus lens.
     
  5. Braineack

    Braineack Been spending a lot of time on here!

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    and redonkulously huge.
     
  6. Derrel

    Derrel Mr. Rain Cloud

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    At 3 kilograms in weight, it is very close to the weight of the superb, AF-S focusing Nikkor 200 f/2 AF-S VR-G, both the original and the Mark II nano-crystal coated model. But...that weight is not really all that unexpected, since this is an uber-fast aperture lens. But the thing is, with manual focusing, it's going to be a challenge to wring the maximum utility out of this lens in many,many real-world shooting situations! But I reallllllly can not see the practical value of a lens that is just one f/stop faster than several really good 135mm f/2 lenses. But it does have that limited edition, esoteric, cutting-edge technology appeal working for it.
     
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  7. Solarflare

    Solarflare No longer a newbie, moving up!

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    I'm always confused by comments like this.

    (a) Rounded aperture blades allow very round apertures even with "only" 9 or 7 blades.

    (b) Bokeh quality has literally nothing to do with the roundness of the aperture opening. That only influences how out of focus highlights look. If you optics give you a gaussian distribution, you could have an aperture formed like a square or like a heart and it would still look creamy.

    (c) Bokeh is strongest wide open, and thats when all apertures are perfectly round anyway.
     
  8. Braineack

    Braineack Been spending a lot of time on here!

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    The sample shots look pretty damn good as far as bokeh is concerned. The combo of 1.4 and 135mm has good results.
     
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  9. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    (a) Fair comment - I didn't see anywhere that it mentioned rounded aperture blades, just "11 pcs".
    (b) While my understanding may be a bit different than yours, I will withhold comment as I am by no means an optical engineer, but I would submit that OOF highlights are a major component of 'bokeh'
    (c) or nearly so, granted, HOWEVER, how many of us regularily shoot wide open, especially with a lens like this, which must have, IMO, been designed with the portrait photographer in mind.
     
  10. goodguy

    goodguy Been spending a lot of time on here!

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    Only MF, big, heavy, expensive
    Nahh sorry if I want to go crazy I would rather go full blast and get the Nikon 200mm f2 which is also AF
    To me it looks like this is a lens for somebody who want you to know you have an uncommon lens rather then really use it.
     
  11. Solarflare

    Solarflare No longer a newbie, moving up!

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    Its also twice as expensive though.
     
  12. Derrel

    Derrel Mr. Rain Cloud

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    The 11-blade aperture design is shared by....drum rollllllllllllllllll. Leica M-series lenses. According to Rockwell, 11- and 13-blade diaphragms create very small sunstars.Sunstars

    Sunstars, or starbursts, whatever you wanna call them, are a HUGE deal these days to landscape and night-scene shooters. Street lights at night can create gorgeous sunstars against night-time blackness in city scenes. This is one area where Canon's 16-35mm L zoom makes very pretty sunset and sunrise images, with an absolutely GORGEOUS sunstar signature!

    Now, what is weird is that odd-numbered irises create TWICE AS MANY points on a sunstar as the blade count, but even-numbered irises create the same number of points on the sunstar as there are blades in the diaphragm. So...lenses with 5,7,9 blades create 10,14,and 18-point sunstars. Lenses with 6 or 8 blades create six- or eight-pointed sunstars. As Rockwell notes, "With 11 or 15 blades, it's very tough to see sunstars becasuse the light is divided up into so many places."

    Even with straight-edged blades, an 11-blade iris has a pretty nice,round aperture. But roundness of aperture is not really all there is to bokeh, but it does affect the shape of OOF specular highlights quite a bit, and can dramatically impact the sunstar pattern.
     

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