{"id":7363,"date":"2012-11-16T06:45:49","date_gmt":"2012-11-16T14:45:49","guid":{"rendered":"http:\/\/wkoopmans.ca\/notebook\/?p=7363"},"modified":"2012-11-15T20:16:20","modified_gmt":"2012-11-16T04:16:20","slug":"the-quirk-pentax-q-mount-12mm-f14-5-macro-central-focus-pancake-lens","status":"publish","type":"post","link":"http:\/\/wkoopmans.ca\/notebook\/?p=7363","title":{"rendered":"The Quirk (Pentax Q-mount 12mm f1:4.5 macro, central focus, pancake lens)"},"content":{"rendered":"

Introducing the Quirk<\/strong><\/em><\/p>\n

\"\"<\/span><\/span><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Yes it’s uniQ<\/strong>ue.\u00a0 I’ve taken what I’ve learned from building my own K-mount lenses and am applying it to the Q<\/strong>-mount.\u00a0 In fact this is the main reason I bought the Pentax Q<\/strong> so that I could build tiny little lenses and ultimately have a whole bag of them or pockets which ever.\u00a0 The primary optical element of the lens is a coated convex lens of about 12mm focal length.\u00a0 It once comprised part of the optical system of either a video camera or a super zoom (I have Q<\/strong>uite\u00a0a few lens elements of indeterminate\u00a0lineage).\u00a0\u00a0 For mounting it on the camera I am using an Q<\/strong> to C-mount adapter that I have taken apart.\u00a0 To improve the image Q<\/strong>uality a little I also have created a fixed mechanical aperture that stops the lens down from f2.0 to f4.5.\u00a0 The focus is technically set to 30cm but can be adjusted by\u00a0sQ<\/strong>ueezing\u00a0the front of the lens, I know that sound odd but it allows for amazingly smooth focus during video recording.\u00a0 As you can see the lens is incredibly small even when compared to the diminutive SMC Pentax 1:1.9 8.5mm AL[IF]<\/em><\/strong><\/p>\n

\"\"<\/span><\/span><\/span><\/span><\/span><\/p>\n

With the lens mounted the camera can easily be slipped into a pocket and remains protected, much like a body cap would.<\/p>\n

\"\"<\/span><\/span><\/span><\/span><\/span><\/p>\n

Looking at the sample images you might wonder if I also used the blur control feature of the Pentax Q but I did not.\u00a0 Any distortion of the image is done entirely by the optics. I have done some levels and colour adjustments in Lightroom.\u00a0 There are commercial products for larger sensor mount cameras that generate similar distortions but nothing that I am aware of for the Q yet.<\/p>\n\n\t\t