| View previous topic :: View next topic |
| Author |
Message |
thebbm
Joined: 11 Dec 2013
Posts: 295
Location: France montpellier
|
 Posted: Thu Aug 21, 2014 8:12 pm Post subject: Why voigtlander nokton 35mm 1.4 get 2 iris blade? |
 |
|
thebbm wrote:
Hello
I get a voigtlander nokton 35mm 1.4 and i notice that there is two iris blade inside :
Any one know why they build it with this 2 iris blade?
Best regards |
|
| Back to top |
|
 |
Nordentro
Joined: 24 Jun 2010
Posts: 4713
Location: Lillehammer, Norway
Expire: 2015-01-29
|
| Posted: Thu Aug 21, 2014 8:22 pm Post subject: |
|
|
Nordentro wrote:
It`s just an "L" shape of the iris blades 
_________________
Lars | Manuellfokus.no |
|
| Back to top |
|
|
Layer-cake
Joined: 18 Mar 2013
Posts: 560
Location: Cape Town
|
| Posted: Thu Aug 21, 2014 8:24 pm Post subject: |
|
|
Layer-cake wrote:
indeed, I have made the same mistake before on a different lens.... open and close the blades and you will see the L shape. |
|
| Back to top |
|
|
thebbm
Joined: 11 Dec 2013
Posts: 295
Location: France montpellier
|
| Posted: Fri Aug 22, 2014 5:47 am Post subject: |
|
|
thebbm wrote:
Ok thank You.
I'm curious to see how it is inside |
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10543
Location: California
Expire: 2025-04-11
|
| Posted: Fri Aug 22, 2014 3:09 pm Post subject: |
|
|
visualopsins wrote:
Here is process lens with dual diaphragm:
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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 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 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
calvin83
Joined: 12 Apr 2009
Posts: 7554
Location: Hong Kong
|
| Posted: Fri Aug 22, 2014 4:20 pm Post subject: |
|
|
calvin83 wrote:
The STF have two sets of blades too.
_________________
https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
|
| Back to top |
|
|
philslizzy
Joined: 07 Aug 2012
Posts: 4748
Location: Cheshire, England
|
| Posted: Sat Aug 23, 2014 12:06 am Post subject: |
|
|
philslizzy wrote:
The Helios 103 appears to have to sets of iris blades. Lloydy posted a video some time back. I think its the shape of the blades.
_________________
Hero in the 'messin-with-cameras-for-the-hell-of-it department'. Official. |
|
| Back to top |
|
|
Lightshow
Joined: 04 Nov 2011
Posts: 3669
Location: Calgary
|
| Posted: Sat Aug 23, 2014 3:49 am Post subject: |
|
|
Lightshow wrote:
Blades come in a verity of shapes.
Images From google image search.
There are usually 2 tabs on a blade, 1 is in a fixed position, the other is moved via a ring with typically a slot for the other tab to fit in.
This is what most 3-9 blade aperture blades look like.
All of which look like this on one side.
And like this on the other.
High blade count apertures 14-20+
Look like this when taken apart, putting it back together is a big pain in the butt.
This is close to what the double aperture blade looks like that the OP was asking about.
The dual iris of the STF
_________________
A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
|
| Back to top |
|
|
Basilisk
Joined: 21 Mar 2013
Posts: 356
Location: UK
|
| Posted: Sat Aug 23, 2014 9:46 am Post subject: |
|
|
Basilisk wrote:
Some fantastic nerdy pics on this thread. Really interesting. |
|
| Back to top |
|
|
mo
Joined: 27 Aug 2009
Posts: 8982
Location: Australia
Expire: 2016-07-30
|
| Posted: Sat Aug 23, 2014 11:02 am Post subject: |
|
|
mo wrote:
Thank you for showing these blades in their unnatural state,looks like a jigsaw puzzle you don't want to mess with!
_________________
Moira, Moderator 
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
|
|
| Back to top |
|
|
BurstMox
Joined: 04 Dec 2011
Posts: 1998
Location: France
Expire: 2016-08-02
|
| Posted: Sat Aug 23, 2014 12:00 pm Post subject: |
|
|
BurstMox wrote:
The Mir-1A has 2 set of diaph too
https://www.youtube.com/watch?v=z6j6QX_wfXw
_________________
Pierre
sovietlenses.fr
Soviet lenses Facebook group |
|
| Back to top |
|
|
Lightshow
Joined: 04 Nov 2011
Posts: 3669
Location: Calgary
|
| Posted: Sun Aug 24, 2014 5:38 am Post subject: |
|
|
Lightshow wrote:
| mo wrote: |
| Thank you for showing these blades in their unnatural state,looks like a jigsaw puzzle you don't want to mess with! |
Not if you don't have to, but it can be done, as I have taken 2 apart to clean the oil out before the optics became contaminated, it's quite easy till they start to overlap, then the trick is to keep the ones that are done in their proper locations as you add new ones under them to their proper locations, once that's done, it's just a matter of joining the aperture to the lens body and having everything lined up.
_________________
A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
|
| Back to top |
|
|
bernhardas
Joined: 01 Jan 2013
Posts: 1437
Expire: 2017-05-23
|
| Posted: Sun Aug 24, 2014 5:48 am Post subject: |
|
|
bernhardas wrote:
Edited
Last edited by bernhardas on Sun Jul 03, 2016 12:03 pm; edited 1 time in total |
|
| Back to top |
|
|
Lightshow
Joined: 04 Nov 2011
Posts: 3669
Location: Calgary
|
| Posted: Sun Aug 24, 2014 7:56 am Post subject: |
|
|
Lightshow wrote:
I've taken apart and successfully put back together my Topcor R 135/3.5 which has 12 'L' shaped blades,
and my Carsen 135/2.8 has 15 blade 'C' type.
The 'L' type seem to be an attempt at getting a rounder small aperture.
_________________
A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
|
| Back to top |
|
|
mo
Joined: 27 Aug 2009
Posts: 8982
Location: Australia
Expire: 2016-07-30
|
| Posted: Sun Aug 24, 2014 8:01 am Post subject: |
|
|
mo wrote:
I have some apertures from lenses that were pulled apart because they were already broken when bought.I will practice on these and see if I can put them back together. I am waiting on a lens spanner that seems to be taking forever to get here,I hope it comes next week.
_________________
Moira, Moderator
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
|
|
| Back to top |
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
