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Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
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Posted: Sat Sep 20, 2014 5:11 pm Post subject: Olympus Zuiko Macro 20mm F3.5 |
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Gerald wrote:
I bought this lens brand new many years ago. I remember I paid about $ 50. Today, thanks to the collectors of the OM system, this same lens is being sold used for 10x more!
The Zuiko 20mm F3.5 is a small but dense lens because it's all built in brass, as most lenses for microscopy and scientific applications. The thread is the standard RMS. More information can be found here:
http://www.alanwood.net/photography/olympus/macro-lens-20-35.html
The Zuiko 20mm F3.5 is intended for use on a bellows, but can also be attached directly to the camera, as shown in the photo below. Under this conditions, the magnification is 2.6x, i.e., it is very much within the domain of true macro photography. With extension rings or bellows one can reach 12x magnification, or even more.
Most of the photos were taken with the setup shown above. The camera was on a tripod and I used the EFSC (Electronic First Shutter Curtain) feature, which is just what the doctor ordered when you want to eliminate vibration in macro and telephoto photography.
The depth of field was so small I had to use aperture F16. However, the effective aperture was F58 because of the 2.6x magnification used. There is no doubt that an aperture so small is not good for high resolution, but F58 appears to be enough for an image width of 1024 pixels. On a more serious application, you should use larger aperture with focus stacking.
Final Comment
Nature can be beautiful on a microscopic scale: there are colors, textures and shapes that deserve to be photographed. Lovers of bokeh will also be served by macro photography even when using apertures as small as F58! It is amazing how a simple plant can offer opportunity for dozens of interesting pictures. Simply changing the position of the camera a few centimeters is enough to find new angles and interesting compositions.
_________________ If raindrops were perfect lenses, the rainbow did not exist. |
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Attila
Joined: 24 Feb 2007 Posts: 57865 Location: Hungary
Expire: 2025-11-18
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Posted: Sat Sep 20, 2014 6:53 pm Post subject: |
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Attila wrote:
Looks top lens indeed congrats!! _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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fuzzywuzzy
Joined: 18 Dec 2010 Posts: 1258 Location: Down East, Canada, eh?
Expire: 2013-11-30
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Posted: Sat Sep 20, 2014 7:08 pm Post subject: |
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fuzzywuzzy wrote:
Very nice!
You must be very close to the subjects at that magnification? _________________ I welcome C&C, editing my pics and reposting them on the forum is fine.
NEX-F3
~~~~~~~~~
CZJ Sonnar 135/4, Biotar 58/2, Pancolar 50/2, Tessar 50/2.8, Flek 35/2.8, Flek 25/4
Super Takumar 135/2.5, 135/3.5, 100/4 bellows, 50/1.4, 28/3.5
Helios 58/2, 3M-5A 500/8, Mir 20M
Vivitar Series 1 70-210 - - - - - - - - Nikkor 200/4
Rikenon 28/2.8 - - - - - - - - Zeiss 50/1.7 Planar
PB 50/2.4, 135/2.8
Yashica 50/1.9, 28/2.8, 135/2.8
Hexanon 28/3.5, 50/1.4 |
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Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
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Posted: Sat Sep 20, 2014 8:13 pm Post subject: |
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Gerald wrote:
Attila wrote: |
Looks top lens indeed congrats!! |
Thank you Attila!
Yes, I think the Zuiko 20mm F3.5 Macro is an old but interesting lens. Unfortunately this type of lens is not too common because it is not aimed at ordinary photograph, but at scientific and specialized jobs. Interestingly, the Zuiko 20mm F3.5 Macro lens is a Tessar, i.e. it is not very special except for the short focal distance.
An interesting modern lens for macro photography beyond 1:1 is the Canon MP-E 65mm f/2.8 Macro Photo 1-5x, which costs more than $1,000! Many people have used with sucess a common wide-angle 28mm lens reverse mounted to do high-quality macro photography with magnifications higher than 1x.
fuzzywuzzy wrote: |
Very nice!
You must be very close to the subjects at that magnification? |
Thanks!
The working distance is more or less equal to the focal length, i.e. about 20mm. _________________ If raindrops were perfect lenses, the rainbow did not exist. |
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kds315*
Joined: 12 Mar 2008 Posts: 16625 Location: Weinheim, Germany
Expire: 2021-03-09
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Posted: Sat Sep 20, 2014 8:53 pm Post subject: |
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kds315* wrote:
http://www.macrolenses.de/ml_detail.php?ObjektiveNr=39
I have it too and it is computed to be used at 4...12x
It seems to be very patient when used about that range, which
you images nicely show. _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
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listera
Joined: 24 Oct 2013 Posts: 126 Location: Ankara
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Posted: Sun Sep 21, 2014 7:23 am Post subject: |
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listera wrote:
I am not sure I would have your patience. Congrats... _________________ Zuikoware / Rokkorprone / FDthropist
https://www.flickr.com/photos/97103793@N06/ |
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uddhava
Joined: 22 Aug 2012 Posts: 3072 Location: Hungary
Expire: 2021-06-21
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Posted: Sun Sep 21, 2014 8:03 am Post subject: |
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uddhava wrote:
Very nice photos. I would like to try something like this when I have the right lens. |
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Gerald
Joined: 25 Mar 2014 Posts: 1196 Location: Brazil
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Posted: Tue Sep 23, 2014 2:04 am Post subject: |
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Gerald wrote:
Thank you, guys!
I found interesting the comments about my "patience". Actually, I had a lot of fun in taking the photos. I encourage everyone to try macro photography with magnifications greater than 1:1. You do not need special equipment. A reverse mounted 28mm wide angle is well suited. Reverse rings made in China are cheap and almost everyone has a 28mm lens. Of course a 24mm or 20mm lens allow even greater magnification. _________________ If raindrops were perfect lenses, the rainbow did not exist. |
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