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wolan
Joined: 30 Jun 2015 Posts: 576 Location: Zurich
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Posted: Mon Apr 15, 2019 9:27 am Post subject: Adapting a popular lens.. |
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wolan wrote:
So far, the most crazy DIY project I have ever heard of...
https://www.instructables.com/id/How-to-Adapt-a-Door-Viewer-quotFish-eye-Lensquo/
Have a great week
N. _________________ https://www.flickr.com/photos/149089857@N03/ |
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Sciolist
Joined: 29 Mar 2017 Posts: 1445 Location: Scotland
Expire: 2021-04-16
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Posted: Mon Apr 15, 2019 11:19 am Post subject: |
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Sciolist wrote:
Ha! That's excellent.
Best I've seen lately isn't adapting a lens, but adapting ice -
https://www.youtube.com/watch?v=jWvwt3mCu68 |
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kypfer
Joined: 27 Sep 2017 Posts: 516 Location: Jersey C.I.
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Posted: Mon Apr 15, 2019 2:57 pm Post subject: |
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kypfer wrote:
I remember fitting a door viewer into a cap back in the '70's and using it on my Zenit. Once the necessary exposure had been established it was a bit of a novelty, but the image quality hardly justified the effort!
Last edited by kypfer on Tue Apr 16, 2019 7:31 am; edited 1 time in total |
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Lloydy
Joined: 02 Sep 2009 Posts: 7785 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Mon Apr 15, 2019 8:31 pm Post subject: |
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Lloydy wrote:
Not so crazy.....I did it back in 2012 and it worked. I 'fixed' a door viewer threaded into a flexible plastic lens cap and stuck on the front of a lens. For the snowdrop picture I used a 28mm lens, on my Pentax K10. It's not a mega-buck fisheye, it's a bit of fun.
_________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Wed Apr 17, 2019 2:44 pm Post subject: |
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cooltouch wrote:
I did something similar to this with an old 8mm format Wollensack 1/2" lens (about 6mm). I drilled a hole in a 49mm lens cap, and glued it in place, but I reverse mounted it, so that it would increase the magnification. Mounted the cap to my Tamron 90mm macro. Unlike the door lens, it doesn't do a fisheye -- in fact, it delivers a full-frame image, at tremendous magnification. Sharpness is quite good. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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Focusthrow
Joined: 12 Sep 2017 Posts: 209
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Posted: Wed Apr 17, 2019 6:08 pm Post subject: |
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Focusthrow wrote:
cooltouch wrote: |
I did something similar to this with an old 8mm format Wollensack 1/2" lens (about 6mm). I drilled a hole in a 49mm lens cap, and glued it in place, but I reverse mounted it, so that it would increase the magnification. Mounted the cap to my Tamron 90mm macro. Unlike the door lens, it doesn't do a fisheye -- in fact, it delivers a full-frame image, at tremendous magnification. Sharpness is quite good. |
Sounds fascinating indeed! Can you be kind enough to share some stuff done with it? Best, jt _________________ Sabbapāpassa akaraṇaṃ kusalassa upasampadā
Sacittapariyodapanaṃ etaṃ buddhāna sāsanaṃ. DHP |
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kiddo
Joined: 29 Jun 2018 Posts: 1121
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Posted: Thu Apr 18, 2019 1:45 am Post subject: |
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kiddo wrote:
This door viewer would be nicer attached to a new gen 48mp cellphone sensor like Xiaomi note 7 |
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DConvert
Joined: 12 Jun 2010 Posts: 902 Location: Essex UK
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Posted: Thu Apr 18, 2019 9:39 pm Post subject: |
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DConvert wrote:
I really don't need another fish-eye, but this appeals to the point I just couldn't resist spending £1 on a door viewer from e-bay.
If things run true to form by the time it arrives I'll probably have forgotten why I got it... |
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alex ph
Joined: 16 Mar 2013 Posts: 1571
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Posted: Fri Apr 19, 2019 1:39 am Post subject: |
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alex ph wrote:
Lloydy, a very good quality of sample shot that one does not expect from a humble spy hole! |
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Sat Apr 20, 2019 7:28 am Post subject: |
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cooltouch wrote:
Focusthrow wrote: |
cooltouch wrote: |
I did something similar to this with an old 8mm format Wollensack 1/2" lens (about 6mm). I drilled a hole in a 49mm lens cap, and glued it in place, but I reverse mounted it, so that it would increase the magnification. Mounted the cap to my Tamron 90mm macro. Unlike the door lens, it doesn't do a fisheye -- in fact, it delivers a full-frame image, at tremendous magnification. Sharpness is quite good. |
Sounds fascinating indeed! Can you be kind enough to share some stuff done with it? Best, jt |
Sure. Here's a shot of the lens glued to the lens cap. Kinda crude looking, I know, but it works:
Here's a shot of the subject at a "regular" focal length. It's the side of an old Lexmark printer box. Note the lens sitting on top of the box:
And a close up of the area that I was zeroing in on. The "XP" in Windows XP was my final point of focus:
And finally, the high magnification image. Resolution's not bad, eh?
I was kinda surprised I got a full frame image with no vignetting from that tiny 1/2" lens, but coverage was decent. As you can see, the image is getting soft toward the edges, but center sharpness is good.
A great thing about using 8mm format, aka "D" size lens mount lenses, is those old lenses are dirt cheap. Some of them, like the Swiss Kern Palliards built for the old Bolex 8s are optically excellent, but somewhat pricey. But as you can see, even that lowly old Wollensak did a decent job. I don't think I paid more than about $5 for that old Wollensak.
Another important thing to remember whenever reverse-mounting a lens is, the wider angle the lens, the greater the magnification. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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