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winmazing
Joined: 14 Mar 2009 Posts: 32 Location: Vancouver
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Posted: Mon Apr 06, 2009 5:34 am Post subject: More Aperture Blades the better? |
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winmazing wrote:
It looks cooler to have more aperture blades in a lens, but does it make anything better in your pictures? _________________ Canon EOS 5D MK II | EOS M
AF: Canon EF 24-104mm f/4L IS, Canon EF 70-200mm F/4L IS, Canon 50mm f/1.4, Canon 1.4x EF Extender II
MF: Mir-24H 35mm f/2.0, Pentax Super Takumar 50mm f/1.4 |
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nelmu
Joined: 03 Apr 2009 Posts: 8
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Posted: Mon Apr 06, 2009 6:11 am Post subject: |
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nelmu wrote:
I think more aperture blades create a more circular aperture. The more circular the opening, the more aesthetically pleasing the bokeh (OOF highlight rendition).
Oh, and it looks cooler |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Mon Apr 06, 2009 6:33 am Post subject: |
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Orio wrote:
As Nelmu said, many blades (10 or more) make OOF highlights look circular.
This can make a difference in the bokeh especially at the middle apertures, where lenses with less blades look worse.
However, the more blades, the thinner they must be, and thus the easier to damage (and the harder to repair). Also, more blades mean the necessity of more grease to make the blades run smooth. This can (or can not) cause problems with the time, if grease is in excess. Excess grease is a typical problem of some soviet lenses with many blades. _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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winmazing
Joined: 14 Mar 2009 Posts: 32 Location: Vancouver
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Posted: Mon Apr 06, 2009 6:36 am Post subject: |
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winmazing wrote:
I noticed that the most recent production of the Mir-1 has 10 aperture blades - i'm not sure how many there are in the older versions. The optics are probably the same, so i guess only the bokeh effects change _________________ Canon EOS 5D MK II | EOS M
AF: Canon EF 24-104mm f/4L IS, Canon EF 70-200mm F/4L IS, Canon 50mm f/1.4, Canon 1.4x EF Extender II
MF: Mir-24H 35mm f/2.0, Pentax Super Takumar 50mm f/1.4 |
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no-X
Joined: 19 Jul 2008 Posts: 2495 Location: Budejky, Czech Republic
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Posted: Mon Apr 06, 2009 7:48 am Post subject: |
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no-X wrote:
I think number of blades is the 3rd aspect, which has influence on bokeh. The 1st one is optical design. Some lenses has pleasant bokeh despite low number of iris blades. The second is shape of the blades. And than, number of them.
e.g. this picture was taken by Meogon enlarger lens. It has (only) 5 (but) rounded blades:
http://www.abload.de/img/sdim7763h4eje.jpg _________________ (almost) complete list of Helios lenses |
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LucisPictor
Joined: 26 Feb 2007 Posts: 17633 Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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Posted: Mon Apr 06, 2009 8:10 am Post subject: |
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LucisPictor wrote:
Excellent answers already! _________________ Personal forum activity on pause every now and again (due to job obligations)!
Carsten, former Moderator
Things ON SALE
Carsten = "KAPCTEH" = "Karusutenu" | T-shirt?.........................My photos from Emilia: http://www.schouler.net/emilia/emilia2011.html
My gear: http://retrocameracs.wordpress.com/ausrustung/
Old list: http://forum.mflenses.com/viewtopic.php?t=65 (Not up-to-date, sorry!) | http://www.lucispictor.de | http://www.alensaweek.wordpress.com |
http://www.retrocamera.de |
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poilu
Joined: 26 Aug 2007 Posts: 10472 Location: Greece
Expire: 2019-08-29
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Posted: Mon Apr 06, 2009 9:14 am Post subject: |
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poilu wrote:
more aperture blades mean more circular OOF highlights
quality of bokeh have more to do with optical design
most of my lens have 6 blades but after 100000 digital shots, I never seen any hexagonal highlight
I believe some people compose expressly to get those highlights, like those who only shot walls
If you are a highlight fanatic, check this link for extra shapes
trimbone bokeh |
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A G Photography
Joined: 11 May 2008 Posts: 1480 Location: Bologna - Italy
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Posted: Mon Apr 06, 2009 9:20 am Post subject: |
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A G Photography wrote:
poilu wrote: |
most of my lens have 6 blades but after 100000 digital shots, I never seen any hexagonal highlight
I believe some people compose expressly to get those highlights, like those who only shot walls
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In 100000 digital shots you evidently never shot against some point lights. _________________ Alessandro
My Photography Website
My Blog about Photography and Italian Cuisine
My Photostream on Flickr
--------------------------------------------------------
DSLR: Nikon d80, Olympus e410
SLR: Chinon CX, Fujica ST605n, Nikon f601, Pentacon FM, Pentax Spotmatic SPII, Praktica FX, Praktica FX2, Voigtlander VST1, Yashica FX-3, Zeiss Contaflex
RF: Altissa Altix, Zorki Ie, Kiev 4b
Medium Format: Pentacon Six TL, Zeiss Ikonta 520/2, Mockba 4, Voigtlander Bessa I, Agfa Isolette II, Agfa Isola
Large Format: Cambo SC 4x5, Rodenstock Sinaron 150/5.6, Rodenstock Rodagon 150/5.6, Schneider Kreuznach Symmar 180/5.6
Lenses
Nikkors: 28/3.5 AIS, 35/2, 50/1.8, 50/2 H, Micro 55/3.5, Micro 60/2.8, 85/1.8, 135/3.5 AI, 200/4 NAI, 18-55/3.5-5.6, 28-80/3.5-5.6, 55-200/4-5.6
CY: Distagon 28/2.8, Planar 50/1.4, Yashika 50/1.7, Sonnar 135/2.8
CZJ m42-Exakta: Flektogon 20/4, Flektogon 35/2.8, Tessar 40/4.5, Tessar 50/2.8, Pancolar 50/1.8, Pancolar 50/2, Biotar 58/2, Biotar 75/1.5, Tessar 80/2.8, Sonnar 135/3.5, Sonnar 135/4, Triotar 135/4
CZJ P6: Flektogon 50/4, Flektogon 65/2.8, Biometar 80/2.8, Biometar 120/2.8, Sonnar 180/2.8
Meyer-Pentacon: Orestegon 29/2.8, Pentacon 29/2.8, Lydith 30/3.5, Primagon 35/4.5, Helioplan 40/4.5, Domiplan 50/2.8, Primotar 50/3.5, Oreston 50/1.8, Primoplan 58/1.9, Orestor 100/2.8, Trioplan 100/2.8, Helioplan 135/4.5, Orestor 135/2.8, Pentacon 135/2.8, Primotar 135/3.5, Primotar 180/3.5, Telemegor 180/5.5, Orestegor 200/4, Pentacon 200/4, Orestegor 300/4, Telemegor 300/4.5, Telemegor 400/5.5
Schneider-Kreuznach: Curtagon 28/4, Curtagon 35/2.8, Xenon 50/1.9, Xenar 50/2.8, Tele Xenar 135/3.5, Tele Xenar 200/4
Russians: Arsat Zodiak 30/3.5, Mir-I 37/2.8, Volna-9 50/2.8, Industar-50 50/3.5, Industar-61 50/2.8, Helios 44 58/2, Helios 44-2 58/2, Helios 44-M-4 58/2, Volna-3 80/2.8, Helios 40 85/1.5, Jupiter 9 85/2, Jupiter 11 135/4
Others: Chinon-Tomioka 55/1.4, Helios 28/2.8, Isco Iscotar 50/2.8, Konica Hexanon 40/1.8, Ludwig Meritar 50/2.9, Schacht Travegon 35/3.5, Schacht Travenon 135/4.5, Sekor 55/1.8, Sigma MF 28/2.8, S-Takumar, 28/3.5, S-Takumar 50/1.4, S-Takumar 55/1.8, S-Takumar 55/2, Steinheil Quinar 135/2.8, Steinheil Culminar 135/4.5, Vivitar 135/2.8, Voigtlander Ultron 50/1.8, Yashica Yashinon DX 50/1.4, Zuiko MC Auto-W 28/2.8
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poilu
Joined: 26 Aug 2007 Posts: 10472 Location: Greece
Expire: 2019-08-29
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Posted: Mon Apr 06, 2009 9:34 am Post subject: |
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poilu wrote:
A G Photography wrote: |
poilu wrote: |
most of my lens have 6 blades but after 100000 digital shots, I never seen any hexagonal highlight
I believe some people compose expressly to get those highlights, like those who only shot walls
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In 100000 digital shots you evidently never shot against some point lights. |
many times! but usually it is night and then I shot only wide open |
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sichko
Joined: 20 Jun 2008 Posts: 2475 Location: South West UK
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Posted: Mon Apr 06, 2009 9:50 am Post subject: |
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sichko wrote:
If you do a search for "aperture blades bokeh" you can find quite a few opinions, points of view, analyses & discussions. I have found the follwing two links to be helpful
http://rick_oleson.tripod.com/index-207.html
http://www.rickdenney.com/bokeh_test.htm _________________ John |
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Esox lucius
Joined: 26 Aug 2008 Posts: 2441 Location: Helsinki, Finland
Expire: 2011-11-18
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Posted: Mon Apr 06, 2009 10:50 am Post subject: |
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Esox lucius wrote:
link http://www.flickr.com/photos/mureena/154075085/ _________________ Vilhelm
Nikon DSLR: D4, D800, Nikon D3, D70
Nikon SLR: Nikon F100, Nikon FM2n
Nikkor MF: 20/2.8 Ai-S, 24/2 Ai-S, 24/2.8 Ai-S, 28/2 Ai-S, 28/2.8 Ai-S, 35/1.4 AIS, 35/2 Ai-S, 45/2.8 GN, 50/1.2 Ai, 50/1.2 Ai-S, 50/1.4 Ai, 50/1.4 Ai-S, 50/1.8 AI-S "long", 50/1.8 AI-S "short", 55/1.2 Ai, 85/1.4 Ai-S, 85/1.8H, 105/2.5 Ai, 135/2.8Q, 135/3.5 Ai, 180/2.8 Ai-S ED
Nikkor AF/AF-S FX: 14-24/2.8G, 16/2.8D Fisheye, 16-35/4G VR, 17-35/2.8D, 24/1.4G, 24/3.5D PC-E, 24/2.8D, 24-70/2.8G, 28/1.4D, 28/1.8G, 35/1.4G, 35/2D, 50/1.4D, 50/1.4G, 50/1.8G, 60/2.8 Micro, 60/2.8G Micro, 70-200/2.8G VR, 70-200/2.8G VR II, 80-400/4.5-5.6D VR, 85/1.4G, 85/2.8D PC-E Micro, 105/2D DC, 105/2.8G VR Micro, 135/2D DC, 200/2G VR, 200-400/4G VR, 300/2.8G VR, 300/4D ED, 400/2.8G VR, 800/5.6E VR
Nikkor AF/AF-S DX: 10.5/2.8G Fisheye, 12-24/4G, 18-70/3.5-4.5G
Topcor: Auto-Topcor 58/1.4,
Voigtländer SL: 40/2 Ultron, 58/1.4 Nokton, 75/2.5 Color-Heliar, 90/3.5 APO-Lanthar, 125/2.5 APO-Lanthar, 180/4 APO-Lanthar
Zeiss ZF: Planar T* 85/1.4 ZF
M42 SLR: Voigtländer Bessaflex TM
M42: Flektogon 20/4, Flektogon 35/2.4, Tessar 50/2.8 T, Super-Takumar 55/1.8, Biotar 58/2 T, Pentacon 135/2.8, Sonnar 135/3.5
Medium format: several Zeiss Super Ikonta 532/16 Opton-Tessar 80mm f/2.8, Zeiss Ikonta 524/16 Opton-Tessar 75mm f/3.5
Leica: R7, M4, Super-Angulon-R 4/21, Elmarit-R 2.8/28, Summicron-R 2/35, Summicron-M 2/35, Summicron-M 2/50, Elmarit-R 2,8/180 |
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greg
Joined: 21 Mar 2009 Posts: 683
Expire: 2012-12-03
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Posted: Mon Apr 06, 2009 11:28 am Post subject: |
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greg wrote:
This is very timely for me as I was pondering the same question while looking over the various lenses available to fill out my kit. |
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thePiRaTE!!
Joined: 31 Oct 2008 Posts: 416 Location: Canada
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Posted: Mon Apr 06, 2009 2:57 pm Post subject: |
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thePiRaTE!! wrote:
poilu wrote: |
more aperture blades mean more circular OOF highlights
quality of bokeh have more to do with optical design
most of my lens have 6 blades but after 100000 digital shots, I never seen any hexagonal highlight
I believe some people compose expressly to get those highlights, like those who only shot walls
If you are a highlight fanatic, check this link for extra shapes
trimbone bokeh |
I agree with this and No-X view. Current lens marketing would have us believe counting blades is a measure of bokeh quality - pure fantasy. As above - the only thing it influences is the shape of specular highlights when the lens is stopped down enough for the shape to be imparted. Further remember that the iris has no effect at all when the lens is wide open. Some (like myself) intentionally select a polygonal iris to acheive a specific look - forget the count as a measure of quality, only as a likely guide to the final shape.
A few samples:
Super Takumar - 6 blades (I think f2.8, note the hexagons are not rigid, as the iris was not fully shaped at this aperture)
Super Takumar - 6 blades
Trioplan wide open (blades have no effect, thus perfect circle)
Biotar 75 - wide open, perfect circles but note how the circles are not round as they approach the perimeter of the shot, optic formula has stretched even the perfect circles into 'cats eyes'.
_________________ kellysereda.com
Sony A7ii, A900, NEX-5
_______________________
Helios: 1.5/85 40-2.
Meyer-Optik: Trioplan 2.8/100, Oreston 1.8/50.
Minolta: Rokkor-PG 1.2/58.
Porst: 1.2/55 Color Reflex.
Sony: 4-5.6/70-400 G.
Takumar: Super Takumar 3.5/135, Super Takumar 1.4/50, SMC Takumar 3.5/28.
Topcon: Topcor 1.4/58.
Voigtländer: Nokton Classic SC 1.4/35.
Zeiss: Planar T*1.2/85 "60 jahre" C/Y, Vario-Sonnar T*3.4/35-70 C/Y, Vario-Sonnar T*2.8/16-35 ZA, Distagon T*2/24 ZA.
lenses for sale here |
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naplam
Joined: 22 Mar 2007 Posts: 469 Location: Spain
Expire: 2013-11-30
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Posted: Mon Apr 06, 2009 4:28 pm Post subject: |
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naplam wrote:
Yep, the number of blades is quite irrelevant for a pleasant bokeh.
For instance, in the previous examples posted:
Hexagonal aperture, but uniform brightness and shape in out of focus areas = neutral, pleasant and beautiful bokeh
thePiRaTE!! wrote: |
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Perfectly round aperture, but not uniform brightness (see the bright rings around the oof lights) = unpleasant bokeh. When this happens, usually the situation is reversed at distances closer than the focus distance.
= unpleasant bokeh despite a perfectly round aperture
thePiRaTE!! wrote: |
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Worst case: brightness not uniform + lots of aberrations in out of focus areas = ugly bokeh, despite a circular iris.
thePiRaTE!! wrote: |
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The number of blades will also determine the star shape of strong lights when they're in focus (like the sun during the day). |
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Wormhandler
Joined: 19 May 2008 Posts: 106 Location: Sweden
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Posted: Mon Apr 06, 2009 5:52 pm Post subject: |
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Wormhandler wrote:
Good or ugly bokeh is in the eye of the beholder...
/Jan _________________
Those which I use:
Carl Zeiss Jena:Tessar 5cm 3,5 Tessar 2,8 50mm (3 versions), Sonnar 135mm 3,5, Tessar 135mm 4,5 (Compur), Flektogon 35mm 2,4, Sonnar 180mm 2,8, Sonnar 300mm 4
Cosina Voigtländer:125mm 2,5 Macro APO Lanthar.
Enna Werk Munchen:Tele-zoom 85-250mm
Ernst Leitz Wetzlar:Voort 90mm 4, Hektor 135mm 4,5
Helios:Helios 44-4 (& 44-2) 58mm 2
Industar:Industar 5cm 3,5, Industar-22 5cm 3,5-rangefinder
Isco Göttingen:Tele Westanar 180mm 4
Meyer Optik Görlitz:Lydith 30mm 3,5, Domiplan 50mm 2,8, Primotar 50 3,5, Orestor 135mm 2,8, Telemegor 150 5,5, Telemegor 180mm 5,5, Orestegor 200mm 4 Telemegor 400mm 5,6.
Mir:Mir 1B 37mm 2,8
Nikon:
Nikkor 35 1.4, Nikkor 85 2, Series E 35mm 2,5, Nikkor 35mm 2, Micro Nikkor 55mm 2,8, Series E 100mm 2,8, Nikkor 135m 2,8, Zoom-Nikkor 35-105mm.
Olympus:F-Zuiko Auto-S 50mm 1.8 (m42), E-zuiko Auto-T 135mm 2,5 (m42), Zuiko 85mm 2 MC (OM)
Panagor (Same as vivitar i Guess):28mm 2,5, 200mm 3,5
Pentacon29mm 2,8, 50mm 1,8, 135mm 2,8
Pentax:Auto takumar 35mm 3.5
SMC-takumar 28 3.5, SMC-Takumar 50mm 1.4, SMC-takumar 135mm 3.5, Takumar (bayonet) 135mm 2.5,Takumar 500mm 4
SMC M 35mm 3.5, SMC M 40 2.8, SMC M 50mm 2, SMC M 50mm 1.7, SMC A 50mm 2, SMC M 100 2.8, SMC M 100mm 4 Macro, SMC M 135mm 3,5 SMC M 200mm 4, SMC M 80-200mm 4,5
Shacht af Ulm:Edixa travenar 50mm 2,8, Edixa Travenar 135mm 3,5
Schneider KreuznachXenar 50mm 3,5, Xenar 50mm 2,8, Radionar 80mm 2,9 (Folder), Radionar 10,5cm 4,5 (Folder), Tele-Xenar 135mm 3,5, Symmar 150mm 5,6, Tele-Xenar 200mm 5,5.
Soligor:100-300mm 5 C/D.
Steinheil:Actinar 10,5cm 4,5 (Prontor)
Tamron:Adaptall2 28mm 2.5, Adaptall2 35-70 3.5, Auto Tamron 28 2.8, Auto.tamron 105 2.5, Auto-tamron 135 2.8, Auto Tamron 200 3.5, Auto Tamron 300 5.6 Tamron SP 70-210 3.5-4
Tokyo Koki:Tele-Tokina 135mm 2.8, Tele-Tokina 135mm 3.5 (brand kennex), Tele-Tokina 300 5.5.
Vivitar:Series 1 70-210 (Kiron)
Yashica:
Auto Yashinon-DX 50mm 1.7, Auto Yashinon-DX 50mm 2, Yashica ML 50mm 1.7, Yashica ML 50mm 2 |
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ChrisLilley
Joined: 01 Jan 2008 Posts: 1767 Location: Nice, France
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Posted: Tue Apr 07, 2009 11:24 am Post subject: |
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ChrisLilley wrote:
poilu wrote: |
A G Photography wrote: |
In 100000 digital shots you evidently never shot against some point lights. |
many times! but usually it is night and then I shot only wide open |
And thus, as the aperture blades were fully retracted, their number and shape had no effect on the image. Obviously. _________________ Camera (ˈkæ mə rə), n. Device for taking pictures in bright light
There are 10 kinds of people in the world: those who understand binary, and those who don’t. Key: Ai-P, Ai, Ai'ed, AiS
Camera: Nikon D90, D40, DK-21M eyepiece, ML-3 remote MF lenses: Nikkor 20mm f/4 K, AI'ed | N.K. Nikkor-N 24mm f/2.8 | Nikkor-N.C 24mm f/2.8 | Nikkor 28mm f/2.8 AiS late model | Арсенал (Arsenal) Мир-24Н (Mir-24N) 35mm f/2 | Cosina Voigtländer Ultron SL II 40mm f/2.0 | Micro-Nikkor 55mm f/2.8 AiS | Zoom-Nikkor 80-200 f/4.5 Ai | ЛЗОС (LZOS) Юпитер-9 (Jupiter-9) 85mm f/2 | Cosina Voigtländer APO-Lanthar 90mm f/3.5 SL | Nikkor-P 105mm f/2.5 pre-Ai, Ai'ed | Micro-Nikkor 105mm f/4 | Schneider Kreuznach Componon 105mm f/5.6 | Nikkor 135mm f/2.8, Ai'ed 1976 model | Nikkor 180mm f/2.8 ED AiS | Арсенал (Arsenal) ТЕЛЕАР-Н (Telear-n) 200mm f/3.5 | Nikkor 300 mm f/4.5 Ai (full equipment list) |
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ChrisLilley
Joined: 01 Jan 2008 Posts: 1767 Location: Nice, France
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Posted: Tue Apr 07, 2009 1:38 pm Post subject: |
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ChrisLilley wrote:
nelmu wrote: |
I think more aperture blades create a more circular aperture. The more circular the opening, the more aesthetically pleasing the bokeh (OOF highlight rendition). |
Yes. One way to approximate a circle is to use a polygon with a greater number of sides. Another way is to not use straight lines to draw a circle in the first place. Curved blades is one way to do that. Not using a physical aperture at all, but defining a virtual one by a pair of (opposite direction) apertures equidistant around the optical crossing-point is another way(*).
The other thing that will affect the image, if there are very bright lights, are star-shaped rays. There will be twice as many rays as the number of blades. Their size seems (to me) to depend on the departure from circularity - a polygon gives more than a circle; a jagged polygon with little gaps gives worse ones, and an even-numbered polygon gives worse ones (because the rays reinforce) than a polygon formed by an odd number of blades.
* hand-wavy. There is doubtless a technical term for that place, which may be nodal point? but I don't know what the correct term is. _________________ Camera (ˈkæ mə rə), n. Device for taking pictures in bright light
There are 10 kinds of people in the world: those who understand binary, and those who don’t. Key: Ai-P, Ai, Ai'ed, AiS
Camera: Nikon D90, D40, DK-21M eyepiece, ML-3 remote MF lenses: Nikkor 20mm f/4 K, AI'ed | N.K. Nikkor-N 24mm f/2.8 | Nikkor-N.C 24mm f/2.8 | Nikkor 28mm f/2.8 AiS late model | Арсенал (Arsenal) Мир-24Н (Mir-24N) 35mm f/2 | Cosina Voigtländer Ultron SL II 40mm f/2.0 | Micro-Nikkor 55mm f/2.8 AiS | Zoom-Nikkor 80-200 f/4.5 Ai | ЛЗОС (LZOS) Юпитер-9 (Jupiter-9) 85mm f/2 | Cosina Voigtländer APO-Lanthar 90mm f/3.5 SL | Nikkor-P 105mm f/2.5 pre-Ai, Ai'ed | Micro-Nikkor 105mm f/4 | Schneider Kreuznach Componon 105mm f/5.6 | Nikkor 135mm f/2.8, Ai'ed 1976 model | Nikkor 180mm f/2.8 ED AiS | Арсенал (Arsenal) ТЕЛЕАР-Н (Telear-n) 200mm f/3.5 | Nikkor 300 mm f/4.5 Ai (full equipment list) |
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martinsmith99
Joined: 31 Aug 2008 Posts: 6950 Location: S Glos, UK
Expire: 2013-11-18
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Posted: Tue Apr 07, 2009 2:49 pm Post subject: |
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martinsmith99 wrote:
Wormhandler wrote: |
Good or ugly bokeh is in the eye of the beholder...
/Jan |
Spot on!
And it's probably only other photographers that notice it. _________________ Casual attendance these days |
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djmike
Joined: 01 Apr 2009 Posts: 930 Location: Taiwan
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Posted: Wed Apr 08, 2009 2:15 pm Post subject: |
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djmike wrote:
typically, I pick lens with more blades until I got Flektogon 35/2.4 which has six only. stunning bokeh _________________
DSLR: Canon 400D
SLR: Nikon FM2 + Canon A-1 + Canon AE1-P + Praktica MTL-5B + Pentax Spotmatic F + Fujica ST801 + Voigtlander Bassematic + Voigtlander Vito + Rollei 35S + Rolleiflex SL35 ME + Canon QL17 GIII + Olympus Pen EE-3
Lenses
M42: CZJ Flektogon 35/2.4 + CZJ Flektogon Zebra 35/2.8 + CZJ Pancolar 50/1.8 + CZJ Sonnar 135/3.5 + CZJ Tessar 50/2.8 Chrome + Pentacon 135/2.8 + Pentacon 50/1.8 + SMC Takumar 50/1.4 + SMC Takumar 55/2 + SMC Takumar 135/3.5 + Fujinon 55/1.8 + Jupiter-9 85/2 + Jupiter-37A 135/3.5 + Helios 44-6 58/2
Nikor: Nikkor 50/1.4 + Nikkor 28/3.5 + Nikkor 35-105 Zoom + 36-72 Series E Zoom
Canon: Canon FD + 28/2.8 + 50/1.8 + Canon 35-105 Macro Zoom
Other: Rollei Planar HFT 50/1.8
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Wed Apr 08, 2009 2:40 pm Post subject: |
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Orio wrote:
Shooting wide open at night is the proof that blades number is far from being everything for bokeh. Wide open, all apertures are circular just the same, but the highlights in bokeh are not the same! Some lenses will create perfectly smooth filled circles. Others will create doughnuts. Others will create doughnuts with a bright point in the middle. Other will show dirt or signs on the inside of the circle. Others will show aberrations affecting only one side of the circle, smudging it.
And all these things depend on the optical design and on the physical condition of the glasses, not at all on the number of the blades. _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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