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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

    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 Super 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 Always on

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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

    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 Always on 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

    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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  9. bobspez

    bobspez New Member

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    I just bought this camera body on ebay and bought the nikon f-mount adapter. I was intrigued with the 5.6 crop factor (the same as on my Nikon Coolpix B700), the ability to use nikon manual lenses with a wider range of apertures than the coolpix B700 aperture range of f3.3 to f8, and the focus peaking feature of the Q10, which would allow me to get a good manual focus.

    I have been testing it with various Nikkor manual film lenses so far have found that the shallow depth of field is a problem with getting an overall sharp image. If you look at the online depth of field (DOF) calculator you will see that DOF is extremely shallow at the higher focal lengths. Since the calculator doesn't have the Pentax Q series I have used the FF equivalent focal length with a FF Nikon as the camera and lens (for example a 50mm lens becomes a 280mm lens on the Q10). At short distances the DOF is extremely thin.

    Overall I find a softness in the pics taken with the Q10. Looking on flickr at Q10 photos I have yet to see a very sharp pic. The attached pic was taken with the Q10 and a nikon nifty fifty from about 6 or 7 ft away with flash. An oddity on the Q10 is that with flash, it freezes the shutter speed at 1/13 of a second, using the flash to create a virtual faster shutter speed. I'm not seeing the Q10 as an all around camera, or even a replacement for the Coolpix b700, Moth Orchid-rs.jpg but see some possibilities (still to be tested) for use with a 55mm macro lens and for moon shots with a 400mm zoom.
     
  10. Roger S

    Roger S Crazy Canuck Administrator

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    Hello and welcome to the forum.

    I did try moon shots with the Q10 and the Nikkor 70-300. The softness was quite evident there, although light and speed control were easy to achieve.
     
  11. bobspez

    bobspez New Member

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    I have not tried a moon shot yet but have realized that using my 55mm Micro-P Macro lens on the Q10 with the fotodiox adapter does seem to perform as well as the same lens on an APS-C Nikon D3100 dslr.
    Another question, did you notice that using the lens adapter the SCN mode menu does not come up?
     
    Last edited: May 20, 2018
  12. Roger S

    Roger S Crazy Canuck Administrator

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    Short answer is yes. The Q10 uses in camera lens identification, as well as in camera control of aperture and shutter. In the menu, under lens, you have to set it to say "No Lens" or nothing works.
     
  13. bobspez

    bobspez New Member

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    Thanks for your reply Roger. However I don't see any menu item that refers to lens. The only setting I see is on page three of the first menu (camera icon) which says Input Focal Length. (I dont have any Q lenses so I am using the fotodiox f-mount adapter for my Nikon lenses on the Q10).
     
  14. Roger S

    Roger S Crazy Canuck Administrator

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    OK, since In am in the process of moving house I don't have access to all the equipment at the moment. I'll dig it out soon and go through the menus again to fully answer this.
     
  15. bobspez

    bobspez New Member

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    Thank you.
     

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