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bogolisk
Joined: 20 Dec 2009
Posts: 448
Expire: 2011-11-18
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 Posted: Thu Dec 09, 2010 11:42 am Post subject: EOS adapter with... 14-blade iris ! |
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bogolisk wrote:
Will this really gonna work? I thought the iris should be designed with the lens and located at a precise location wrt focal point.
Click here to see on Ebay
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When I try to be a photographer I manage to add an f to art. |
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goombles
Joined: 08 Apr 2010
Posts: 136
Location: UK
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| Posted: Thu Dec 09, 2010 9:20 pm Post subject: |
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goombles wrote:
Quite an intersting adapter! Looks like a fancy lens baffle that allows the user to 'stop down' a lens on M43, don't see why it wouldn't work and could come in handy for mirror lenses?
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Cameras: Canon 7D, Olympus OM-2n, Spotmatic SPII
M42: Sonnar 135/3.5, Flektogon 35/2.4, SMC Takumar 50/1.4, SMC Takumar 55/1.8, SMC Takumar 35/3.5
Tamron: SP 90/2.5 Macro |
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visualopsins
Joined: 05 Mar 2009
Posts: 11069
Location: California
Expire: 2025-04-11
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| Posted: Thu Dec 09, 2010 9:29 pm Post subject: |
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visualopsins wrote:
Technically an aperture, however mounted at rear of lens acts like a baffle or mask of image circle, not the same at all as an aperture in the correct placement to cut off faster perimeter light passing through front element. Does nothing at all to DOF. Depending on camera it may help exposure metering, by limiting diameter of image circle.
Imho, a lot cooler would be if it closed completely light tight and had an adjustable timer for use as shutter.
Waste of money? I think so. 
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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visualopsins
Joined: 05 Mar 2009
Posts: 11069
Location: California
Expire: 2025-04-11
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| Posted: Thu Jan 20, 2011 9:49 pm Post subject: |
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visualopsins wrote:
These might be of use with Pentax 110 lenses -- the Pentax 110 has lens diaphragm in the body. Depends on how close is position of diaphragm in adapter to position of diaphragm when lens is mounted on Pentax 110 body.
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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William
Joined: 26 Nov 2009
Posts: 489
Location: London
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| Posted: Thu Jan 20, 2011 11:25 pm Post subject: |
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William wrote:
Looks similar to Voigtlander/Kodak DKL mount to Pentax adapter. Those lenses have their apertures in the body so presumably it works properly and is in the right place. Shame that the adapters cost so much! |
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cooltouch
Joined: 15 Jan 2009
Posts: 9096
Location: Houston, Texas
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| Posted: Fri Jan 21, 2011 5:32 am Post subject: |
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cooltouch wrote:
Reminds me of Waterhouse stops, but on the opposite end of the lens.
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pat donnelly
Joined: 19 Jan 2010
Posts: 666
Location: Brisbane, Australia
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| Posted: Sun Jan 30, 2011 2:31 pm Post subject: Vandals! |
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pat donnelly wrote:
It might be good to find out where they got the beautiful 14 leaf mechanism from?
If they have many sources for them? I doubt they are manufacturing them? Quite an investment too!
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EP-1, E-410, E-300, D100, D1,
C-Mt: 25mm 1.9, 75mm 1.4, 75mm 1.3, 75mm 1.9, Ultra wides, one inch sensor, 20+ c-mount zooms
OM 350mm f2.8, Nikkor 180 f2.8, Exa 180 f2.8,
Tamrons: 90mm f2.5, 500mm f8 x3, 135 f2.5, 200 f3.5, 24mm 2.5, 28mm 2.5 x8,
FD 500mm mirror lens |
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calvin83
Joined: 12 Apr 2009
Posts: 7588
Location: Hong Kong
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| Posted: Sun Jan 30, 2011 2:57 pm Post subject: Re: Vandals! |
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calvin83 wrote:
| pat donnelly wrote: |
It might be good to find out where they got the beautiful 14 leaf mechanism from?
If they have many sources for them? I doubt they are manufacturing them? Quite an investment too! |
I think they manufacturing it themself.
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