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Pancolart
Joined: 04 Feb 2008
Posts: 3705
Location: Slovenia, EU
Expire: 2013-11-18
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 Posted: Wed Jun 29, 2011 4:16 pm Post subject: Hacking lenses: Vivitar 2/24mm (Kiron) and MACRO mode |
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Pancolart wrote:
You remove the mount. And Aperture ring. Then remove scale ring by unscrewing three mini-screws.
You'll see two pins acting as focusing ring blocker. Remove first one from left. This way focusing ring will be able to proceed under minimum focusing distance. Don't worry the system won't unscrew, there is still one pin left now having two stopping functions: at infinity and at macro.
And macro it is: now you will be able to reach 10cm!
I wonder why this wasn't enabled by default.
Quick samples:
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casualcollector
Joined: 01 Aug 2008
Posts: 750
Location: Spaced out on Florida's Space Coast
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| Posted: Wed Jun 29, 2011 9:50 pm Post subject: |
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casualcollector wrote:
I did this long ago with a Kiron 28. Due to the longer focal length the difference wasn't as great. I'm sure the designers were being conservative.
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Found: 135/2.8 #R407660, 200/4 #R405526, 300/5.5 #R411127 |
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pat donnelly
Joined: 19 Jan 2010
Posts: 666
Location: Brisbane, Australia
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| Posted: Thu Jun 30, 2011 4:14 am Post subject: |
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pat donnelly wrote:
Wow!!
Thanks and of course, a little experimentation on other lenses might also bring additional range to them, at close or closer focus!!
This almost deserves to be a mass mailout or something?
Thanks again!
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C-Mt: 25mm 1.9, 75mm 1.4, 75mm 1.3, 75mm 1.9, Ultra wides, one inch sensor, 20+ c-mount zooms
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my_photography
Joined: 03 Nov 2008
Posts: 2772
Location: Pearl of the Orient
Expire: 2016-12-25
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| Posted: Thu Jun 30, 2011 5:14 am Post subject: |
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my_photography wrote:
Wow, interesting. I always like my lens to be able to go as close as possible. But I need to get a kiron 24/2 first.
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Zeiss: CJZ Flektogon 20/2.8, CJZ Flektogon 20/4, , CJZ Pentacon 29/2.8, CJZ Flektogon 35/2.4, CJZ Pancolar 50/1.8, Tessar 50/2.8, Biotar 7.5cm/1.5, CJZ Pancolar 80/1.8, CJZ Sonnar 135/3.5, CJZ Pentacon 135/2.8 CJZ Sonnar 200/2.8
Other Germany: Meyer Primoplan 50/1.8, Meyer Trioplan 100/2.8
Takumar: SMC 50/1.4 Super Tak 55/2, Super Tak 85/1.9, S-M-C 135/3.5, Super Tak 150/4
Russian: Zenith 16/2.8, Mir-24M 2/35, Volna-9 50/2.8, Helios 44M (58/2), Helios 44M-3 MC (58/2), Helios 40 (85/1.5), Tair 11A (135/2.8 )
Others: Sears 28/2.8, Sankor 35/2.8, Enna M�nchen Tele-Ennalyt 135/3.5
Zoom Sigma Zoom 28-85/3.5-4.5
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ZoneV
Joined: 09 Nov 2009
Posts: 1632
Location: Germany
Expire: 2011-12-02
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| Posted: Thu Jun 30, 2011 11:20 am Post subject: |
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ZoneV wrote:
Sounds interesting!
I think I have the same lens hacked for only close focus work, saw yesterday the front name ring between some other rings I searched through (for microsope lens work).
But your extended focussing range sounds better, no extra lens needed.
A Fd 20/2.8 I tried to convert to EOS, didn´t work for EOS 5D because of the mirror. After that I used it for close distances:
http://www.4photos.de/galerie/Sonstiges/slides/Marienkaefer.html
But quality was not as high as I want it.
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