Yoshizen's Blog

Homemade Lens – Mag Lens


Now I got quite few homemade lenses = call them just a fun camera

lens would be confusing, which one ? — I should call them in their

individual name.   So, the lens here happen to be originated from a

SLR’s view finder magnifier, I name it Mag Lens.  

Unlike the other Fun camera lens which is often omunifocus, this

lens has one focal point, its mean needs to be focused by means of

helicoid or a sort.    And I found a zooming helicoid of a Nikon

compact camera will do the job.   So, I hack-saw out the

helicoid part of the camera from its body frame. (Photo above)


With a test of the lens, I found the lens needs to be mounted 40mm

from the image sensor.   Then, I struggled to mount the helicoid to a

body cap, and to mount the lens into the helicoid.  (The photo above,

middle shows how the position of the fixing screw was marked

on the cap.  🙂  )


With a good extension of the helicoid, the lens can give a focus from

the infinity to the x1 macro.  Though, this lens found to have the

biggest halation among all of my homemade lens.   😀


Since the lens was originally a magnifying lens, the quality of the

macro image was quite good.

(Lens itself was F2.5 —> If I put an iris 5mm = F8, image would be

even better.)

And, it has a fade and dissolve like beautiful out of focus Bokhe !


With its shallow depth of field, a face on the card changes a lot.

This lens was a hit.


25 Responses

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  1. Lemony (Gr)Egghead said, on September 29, 2016 at 12:29

    How fun to have the tools and skills to experiment the way you do. And the results are great!

    • yoshizen said, on September 29, 2016 at 13:15

      To disassenble the camera, we only need some small screw drivers and a fruits knife.
      And to cut the camera frame, I used a junior hack-saw costed £1 from China
      and the same fruits knife.
      On top of that, a sheer power on the finger and a lots of patience. Nothing special.
      I quite doubt about the skill. = anyone can do, with patience (do again little by little)
      Worthwhile result ? —– well, waite and see. 😀

  2. […] a homemade Mag Lens on Sony A7R.) […]

  3. […] photo was taken by a homemade Mag Lens and […]

  4. […] were shot by a homemade Mag Lens and the copy […]

  5. […] popped out carring A7R camera with a homemade “Mag lens” attached on it.   But as I saw the fireworks over a park,  soon I realized that I put a […]

  6. […] photos were taken by the lenses, homemade Mag Lens or Halina wide Lens though, few of them were by the Gaudy Lens on the Tilting Bellows with Sony […]

  7. […] lens used were Homemade Mag lens on Sony […]

  8. […] how sweet !  This image was made by the homemade Mag Lens. — not much details (because of heavy Coma aberration) yet, strangely the image of the tree […]

  9. Winter Cherry (again !) | Yoshizen's Blog said, on December 30, 2016 at 02:30

    […] the photos above, left and middle were the same flower though, the middle photo was by the Mag lens (and heavily […]

  10. Sweet images | Yoshizen's Blog said, on March 15, 2017 at 02:13

    […] Well, this is yet another template like photos — fuzzy cherry flowers created by the homemade Mag-Lens.   […]

  11. Jayna said, on April 26, 2017 at 12:02

    I’m not easily imeersspd. . . but that’s impressing me! 🙂

    • yoshizen said, on April 26, 2017 at 20:30

      Thank you Jayna. The end result wasn’t too bad was it, as I didn’t make
      yet another mediocre but drastically bad lens. Ha ha ha. 😀

  12. […] by Canon Fisheye lens, a bit fuzzy images were taken by a Pinhole, and more fuzzy pictures were by homemade Mag Lens on Sony A7R […]

  13. Autumn Color | Yoshizen's Blog said, on November 8, 2017 at 20:36

    […] last photo was by the Mag’ Lens, not by Gaudy Lens —– any way looks the same = doesn’t matter.  As those both […]

  14. […] D850.)  On the way back, I did some snap shots of the town-scape.  (All of them were shot by Mag lens except the last one which was by Fun camera lens)  = Have a fun.   […]

  15. […] Some more snap shot by a homemade So-called Mag Lens. […]

  16. […] dazzing ! ? ? ?  (of the image of Mag lens or my eyes ?) —– I know.   […]

  17. […] Some pictures of the London = According to the Mag Lens view. […]

  18. […] it was bright day, my Mag Lens (which got strongest halation among my homemade lens) would produce just like a blindingly bright […]

  19. Need lens ? | Yoshizen's Blog said, on July 30, 2018 at 00:46

    […] this is the comparison.  Those three photos were not Pinhole but by the Mag lens. Lens will make one fixed focus = other than this distance, the image will be out of focus, which […]

  20. Mug shot (2) | Yoshizen's Blog said, on August 3, 2018 at 09:55

    […] another collection of Mag lens images around the Oxford street, […]

  21. […] the net.  The original was much sharper, rather normal picture.  When I took screen copy using my homemade Mag lens, in order to avoid a moire, I gave a bit of off-focus.  It was a character of the Mag Lens, when […]

  22. End of the season | Yoshizen's Blog said, on October 3, 2018 at 15:02

    […] left here was taken by the Mag lens, and the right was taken by rather normal  Sony 30mm Macro F3.5 on A7R camera — I can agree, […]

  23. Cherry 2020 | Yoshizen's Blog said, on March 9, 2020 at 21:25

    […] Pla-B lens on NZ-7 by Pla-B too By Nikkor 50mm F1.2 on Sony A7R4 By Tamron SP 90mm on Sony A7R4 By Mag lens on Sony A7R4 By Mag […]

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