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Pentax Q10 with Nikon Lenses

Discussion in 'All Other Equipment Reviews Forum' started by Roger S, Feb 13, 2017.

  1. Roger S

    IOTM

    Roger S Crazy Canuck Administrator

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    As you know, I obtained a Pentax Q10 a short while ago, and paid peanuts for it. Well I ordered a lens adaptor for it to fit my manual N1kon lenses, just for fun.

    This is not the greatest scenery, but I thought I would have some fun testing. The Q10 has a 1/2.3 sensor, which makes a crop factor of 5.6 in 35mm terms.

    This first is the Pentax 02 lens which covers 5-15 mm.

    5mm or 35mm equivalent of 28mm

    5mm test.jpg

    Then we move to the Nikon nifty fifty, making this a crop equivalent of 280mm

    50mm test.jpg

    Then I went to the Nikon 100-300 lens at 100mm or a 35mm equivalent of 560mm

    100mm test.jpg

    And finally zooming in to 300mm on the Nikon lens, or 35mm equivalent of 1680mm

    300mm test.jpg

    These are all tripod mounted and aimed at exactly the same centre.

    I have come to a couple of stalling points here. Is it the 300mm lens that is not sharp, or is it the VR built into the camera that makes it lose clarity at a high zoom on a tripod?

    I guess that means more tests are in order.

    I might add that the Q10 prompts you to input the lens info whenever there is not an electronic lens attached. I hadn't even noticed what that did until I examined the EXIF in these and found that the lens length had been written into it. :)
     
    Last edited: Feb 13, 2017
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  2. ed taylor

    ed taylor Super Ed Moderator

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    Works well by the look of it. Love the amount of snow you have
     
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  3. mikew

    mikew Here a lot Premium Member

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    Could you crop one from a Nikon body to match the Pentax size image,that should tell you.
     
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  4. Roger S

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    Roger S Crazy Canuck Administrator

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    There's an idea, but it would be one heckuva crop. I'll give it a go.
     
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  5. MikeB

    MikeB Old Hand Premium Member

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    Good start to the tests. The 300mm shot is a puzzler.
     
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  6. SeanNeedham

    SeanNeedham Ol' Sparky Honorary Life Member

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    Could be one or both Roger; try backing the lens off to about 270mm and having a look. Also, if there's VR in the camera and it's on a tripod, turn the VR off; I don't know about how it's implemented in the Pentax, but a lot of stabilisation systems would introduce visual instability if they're on a stable base because they're trying to compensate against nothing... Basically they're trying to fix something that isn't broken.
     
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  7. Roger S

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    Roger S Crazy Canuck Administrator

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    Thanks Sean. I haven't gotten back to more testing yet as the weather has not been co-operating. I used the tripod and a 2 second timer for each shot to try and reduce vibration so maybe it is the VR that was affecting it. I will be backing off the lens and shutting off VR for my next tests. I want to try and get a moon shot at 1600mm equivalent as soon as the weather decides to let me.
     
  8. SeanNeedham

    SeanNeedham Ol' Sparky Honorary Life Member

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    Given that, I'd say that perhaps a lot of it is the vibration reduction (though still test the lens); some newer stuff is meant to be able to detect how much to put in depending on shake (so would, perhaps should, be able to sense when on a tripod and shut down), though VR is one of them things to me where, like a lot of other system functions, if it's not needed don't have it on. Here's a bit of a good read with some pictures about the ins and outs of it though the info is drawn for lens based systems.

    https://www.bhphotovideo.com/explor...ge-stabilization-when-use-it-and-when-turn-it
     
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