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Thread: Suspect TC and IQ

  1. #1
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    Default Suspect TC and IQ

    I have a Kenko 1.4TC that I use with my Nikkor 300mm f4 prime and since I have been using it I am starting to think im loosing sharpness in my photos. I have removed the TC to give it a go on the weekend without it and see what happens. Has anyone found issues with their TC's? Maybe I should have bought the Nikon one :cry:
    CC's, Reposts and Comments welcomed

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    Carlos
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    Land Rover Discovery
    http://www.plottier.net

  2. #2
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    Default Re: Suspect TC and IQ

    Kenko's 1.4 is excellent. In the Canon world it's as good as Canon's.
    Canon's 2x is better though.

    Nikon's TC quality is known to be not-so-hot, inlcluding the new ones.

    Check out the discussions on Naturescapes about Nikon's TC quality. Specifically E.J. Peiker isn't a big fan, and that man knows his gear and has used pretty much everything.

  3. #3
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    Default Re: Suspect TC and IQ

    I think it's not wise to skimp money and buy third-party converters for good quality lenses. On that note I do use my Canon 1.4x and 2x and they both take excellent images with my measly 300mm lens.

  4. #4
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    Default Re: Suspect TC and IQ

    Quote Originally Posted by AdamJL
    Kenko's 1.4 is excellent. In the Canon world it's as good as Canon's.
    Canon's 2x is better though.

    Nikon's TC quality is known to be not-so-hot, inlcluding the new ones.

    Check out the discussions on Naturescapes about Nikon's TC quality. Specifically E.J. Peiker isn't a big fan, and that man knows his gear and has used pretty much everything.
    I am not sure about that, E.J. is a good landscaping photographer but not so active in avian images.
    If you look the Images that Sar have in his collection with TC and other members here using the Nikon 600 plus a TC you will see that the quality is excellent.
    There are few members here that have excellet results with the Nikon 300 f/4 plus the Nikon TC1.4
    With the 1.7 is different case
    http://www.plottier.net
    http://arthur-plottier.megashot.net/
    My gear: Nikon D300s, lens and Land Rover Defender

  5. #5
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    Default Re: Suspect TC and IQ

    I Have a Nikkor 300mm f/4-5.6, and it looses alot of sharpness and quality when at full zoom, so the lens may be your problem, rather then your TC. I know that's why my shots of captive birds look better, only need to be at say 170mm...
    Worldwide: ~900 Australia: 396 Birds on my block*: 113
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    Default Re: Suspect TC and IQ

    I have the Nikkor 300mm f/4, 500mm f/4 and 70-200 f/2.8 lenses. I use the Nikkor 1.4 and 1.7 TCs with all these lenses. I accept there is a loss of IQ with the 1.7 TC., so I go to it only when I need the reach. Having said that, if you use the 1.7 TC under the right conditions it is capable of delivering excellent results. The last two Hooded Plover images were shot with a 500mm +1.7 TC combination. I would expect the 300mm + 1.7TC would produce similar IQ. If you think the VR makes the difference, I should point out that I only turn it on when shooting slower than 1/500 (see Thom Hogan's site for an explanation), or in some circumstances when hand holding.

    http://www.feathersandphotos.com.au/...php?f=9&t=6947

    http://www.feathersandphotos.com.au/...php?f=9&t=6966

  7. #7
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    Default Re: Suspect TC and IQ

    Theorically, there is always lost of sharpness when using TC, especially on a zoom.
    In practice, IQ with TC depends on the lens quality, the camera sensor and the shooting techniques.

    In the field, if you know your gear and have the right techniques you still can get acceptable IQ with the worse combo under a crappy light !

    An example here :
    D7000, 200-400 VR+TC-20EIII, 1/160", @700mm, 8 000 ISO, HH.
    http://img135.imageshack.us/img135/9381 ... esize4.jpg

  8. #8
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    Default Re: Suspect TC and IQ

    Thanks for the input. Unfortunately, as we know, the 300mm f/4 is non-VR. I also generally find that my light is not good, most of the time im shooting under 1/400s, which is to slow IMO, especially with my technique!

    Im disapointed that Nikon dont have a VR 300mm like Canon do, and that the next jump in longer VR lenses in the Nikkor range are hugely expensive!

    But one's gotta work with what tools one's got
    CC's, Reposts and Comments welcomed

    _________________________________
    Carlos
    Nikon D300s
    Land Rover Discovery
    http://www.plottier.net

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