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Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.

Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.
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PK Ricoh 4/28-100mm with modificated macro 1:1
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Posted: Thu Mar 25, 2010 3:11 am
Post subject: PK Ricoh 4/28-100mm with modificated macro 1:1
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Posted: Thu Mar 25, 2010 3:11 am
Post subject: PK Ricoh 4/28-100mm with modificated macro 1:1
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I managed to modificate Ricoh macro 1:4 to ratio 1:1. Aperture auto still works, glass is as new.
You can change magnification ratio and minimal focusing distance from 0,5cm to 50cm.
Poppy seeds on an orange and tomato slice.











Last edited by Pancolart on Mon Mar 29, 2010 3:09 pm; edited 3 times in total


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Posted: Mon Mar 29, 2010 10:41 am
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Posted: Mon Mar 29, 2010 10:41 am
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Posted: Mon Mar 29, 2010 2:55 pm
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Posted: Mon Mar 29, 2010 2:55 pm
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Hi, how did you changed the optical formula to get those results?


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Posted: Mon Mar 29, 2010 3:04 pm
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Posted: Mon Mar 29, 2010 3:04 pm
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Optical formula isn't changed only all the limits are off. All three variables can now be taken to their max. values. Many parts became superfluous, outside dust protection is replaced with smooth leather.
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