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koji
Joined: 21 Jul 2008 Posts: 2106 Location: Hiroshima, Japan
Expire: 2012-12-27
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Posted: Tue May 10, 2011 9:24 pm Post subject: |
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koji wrote:
no-X wrote: |
That's quite atypical lens. I have never seen it. The lens diagram is also a bit uncommon - retrofocal lenses often have negative front elements. It could mean, that the lens is quite late optical design based on modern types of glass.
Does it state something like "made in ..."? |
It is not so atypical, Nikon makes such wide angles lenses. Ai20/2.8S &
Ai24/2.8S for example. They say in the lens brochure, the first positive
element makes "wide angle" lens physically smaller. See>
This is for Ai AF Nikikor 20mm F2.8S, same as Manual Ai Nikkor 20/2.8S.
Ai24/2.8S has similar lens block diagram, so as AF 24/2.8S they are
optically same. And famous Flektogon 20/2.8 has a positive front element!!
And this Flektogon 20mm is much smaller than its brother Flektogon 25/4.
Btw, you have done a great work. _________________ Our Home Page has 18,200 photos in 575 directories today.
Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses |
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koji
Joined: 21 Jul 2008 Posts: 2106 Location: Hiroshima, Japan
Expire: 2012-12-27
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Posted: Tue May 10, 2011 11:03 pm Post subject: |
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koji wrote:
I was also very curious, so I disassembled my Prakticar 28/2.8 (plastic version).
(I have three Prakticar 28/2.8s, the other two are metallic construction.)
Optical block diagram looks like in RED.
(black one is Orestgor 29/2.8 )
The first element has very strong negative, aperture is between 3-rd and
4-th element, I am not quite sure about 2-nd and 3-rd element but they
form very strong positive power. Yes, the lens has 7 element and 7 group.
in short:
The second and third elements are much closer than this diagram indicates, I think. _________________ Our Home Page has 18,200 photos in 575 directories today.
Lenses: https://www.pbase.com/kkawakami/top_level_my_lenses |
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Wed May 11, 2011 12:42 am Post subject: |
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cooltouch wrote:
Guys, I've made the offer before, but I figure I should again since it's been so long ago. I have the Cooper books for both Nikon and Minolta system and the Canon F-1 book. Each of these books shows lens diagrams for all of the current lenses as of the date of their publication. In the case of the Nikon and Minolta books, these dates are probably sometime in the early 1970s (non AI Nikkors for example, and no MD Rokkors -- just MC), but the Canon books I have go to 1977 I believe, so they include all of the breechlock FD lenses.
So if you are interested in any of the lens formulas that were current during these time frames, let me know. I can scan them and post them here for your perusal. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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kelsonbueno
Joined: 29 Apr 2011 Posts: 7
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Posted: Wed May 11, 2011 6:04 pm Post subject: |
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kelsonbueno wrote:
cooltouch
Is there any 4 element teleconverter on this book?
Thank you. |
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Wed May 11, 2011 6:36 pm Post subject: |
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cooltouch wrote:
Good question. I looked for teleconverters in both Joseph Cooper publications (Nikon and Minolta) and in the Canon F-1 Guide. In one of the Nikon books, Cooper discussed teleconverters at some length, and mentioned that Nikon did not make any. This was back in 1974, so pre-AI days. Coopers books on Minolta were copyrighted 1972, 73, and 76, and showed only MC lenses, and his book showed no teleconverters either. The Canon F-1 guide showed a 2x converter along with a few of its fluorite telephotos, and while the book showed the optical formulas for the teles, it did not for the 2x. Oh well. I tried. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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kelsonbueno
Joined: 29 Apr 2011 Posts: 7
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Posted: Wed May 11, 2011 8:10 pm Post subject: |
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kelsonbueno wrote:
cooltouch
thank you for the search!
I think that teleconverters are not much "well seen" from the manufacturers, just in case that it could be sold and make money. |
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cooltouch
Joined: 15 Jan 2009 Posts: 9097 Location: Houston, Texas
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Posted: Wed May 11, 2011 9:21 pm Post subject: |
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cooltouch wrote:
Interestingly enough, I did a google search on the topic, looking at the "images" and found quite a few optical formulas for 7-element TCs, but none for 4-element TCs. _________________ Michael
My Gear List: http://michaelmcbroom.com/photo/gear.html
My Gallery: http://michaelmcbroom.com/gallery3/index.php/
My Flickr Page: https://www.flickr.com/photos/11308754@N08/albums
My Music: https://soundcloud.com/michaelmcbroom/albums
My Blog: http://michaelmcbroom.com/blogistan/ |
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kelsonbueno
Joined: 29 Apr 2011 Posts: 7
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Posted: Thu May 12, 2011 2:48 am Post subject: |
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kelsonbueno wrote:
cooltouch
I did the same, but with no success.
The modern canon 1.4x TC use 4 element, but I didn´t saw any diagram, just some specs.
I´d found some 5 elements TC but in this case reference isn´t enough.
The vivitar series 1 also have one 4 element TC, but there´s no more info about it. |
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calvin83
Joined: 12 Apr 2009 Posts: 7547 Location: Hong Kong
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Posted: Thu May 12, 2011 4:29 am Post subject: |
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calvin83 wrote:
kelsonbueno wrote: |
cooltouch
I did the same, but with no success.
The modern canon 1.4x TC use 4 element, but I didn´t saw any diagram, just some specs.
I´d found some 5 elements TC but in this case reference isn´t enough.
The vivitar series 1 also have one 4 element TC, but there´s no more info about it. |
The canon 1.4x II use five elements four groups.
http://www.canon.com.hk/en/product/catalog/productItemDetails.do?categoryID=25&seriesID=10034&prrfnbr=349 _________________ https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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kelsonbueno
Joined: 29 Apr 2011 Posts: 7
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Posted: Thu May 12, 2011 5:13 am Post subject: |
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kelsonbueno wrote:
My mistake!
I found this nice info about tele converters!
http://www.pierretoscani.com/echo_focal_length.html#FocalLength07 |
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taunusreiter
Joined: 20 Mar 2007 Posts: 127
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Posted: Mon Jun 20, 2011 8:03 am Post subject: |
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taunusreiter wrote:
nixland wrote: |
Summicron 90/2 looks like 5 element Takumar?
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Nope. Canon Tele lens patented in 1960 by the great Jiro Mukai, see here: http://www.google.com/patents?vid=USPAT3066575&id=jMBjAAAAEBAJ&pg=PP1&dq=jiro-mukai#v=onepage&q&f=false
This is quite interesting because it prevented Nikon 18 years bringing a short 85/1.8 to the market. They kept with a large Gaussian 85/1.8, or the Sonnarish 105/2.5. Then they took nearly the same formular. (Nikon F AI/AIS 85/2 1977-1995) (alike focussing helicoids, Nikon makes things reversed here...)
The Takumar 85/1.8(1.9)
was a "classic" Ernostar design, retrait from a Sonnar type. Not bad, since this design is still widely spread. But optical correction of the Canon was superior by a wide margin.
BTW, in the main diagram the Canon RF 50/1.5 is missing among the 7 elements Sonnars. _________________ My flickr Gallery
My Classic Camera Website |
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Irrbloss
Joined: 06 Jul 2011 Posts: 3 Location: Stockholm, Sweden
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Posted: Wed Jul 06, 2011 8:54 pm Post subject: Nikkor 50/2 (H, H.C, K and AI) to add att Biotar/Xenon list. |
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Irrbloss wrote:
Nikkor 50/2 (H, H.C, K and AI) to add att Biotar/Xenon list.
A very common lens on the s-h market and an cheap one to. F-mount makes it usable on a lot of things using 24x36 or smaler.
Bad link or am I doing something wrong? Test this:
http://www.flickr.com/photos/37824513@N08/4961516527/in/set-72157623666967030
WTF, it wont even take a link?!? _________________ Civilisation is measured in the amount of commonly owned/mantained/used parts of the society.
Last edited by Irrbloss on Wed Jul 06, 2011 8:58 pm; edited 1 time in total |
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ludoo
Joined: 18 Sep 2009 Posts: 1397 Location: Milan, Italy
Expire: 2011-12-05
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Posted: Wed Jul 06, 2011 8:58 pm Post subject: Re: Nikkor 50/2 (H, H.C, K and AI) to add att Biotar/Xenon l |
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ludoo wrote:
Irrbloss wrote: |
Nikkor 50/2 (H, H.C, K and AI) to add att Biotar/Xenon list.
A very common lens on the s-h market and an cheap one to. F-mount makes it usable on a lot of things using 24x36 or smaler.
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quote for first poster _________________ My galleries
Digital: Samsung EX-1
Past Digital: Samsung NX10, Sigma SD9, Sigma SD10, SD14, DP2, Pentax *istD, Kx, Fuji S2 Pro, Canon 5D
Analog: packfilm Polaroids, 6x9 Kodak folders, Pentacon Taxona half-frame, Fujica ST605n, Walz Envoy, Olympus 35 S-II, Olympus Wide S
Past Analog: Polaroid 600se, Polaroid 110B, Canon IIF, various fixed-lens and Russian rangefinders, ...
Past Lenses: Nikkor 24/2.8, Nikkor SC 50/1.4, Nikkor 50/2, Nikkor H 85/1.8, Nikkor P 105/2.5, Nikkor Q 135/3.5, Fujinon 100/2.8, Fujinon EBC 100/2.8, Fujinon EBC 135/3.5, Fujinon EBC 200/4.5, Mamiya SX 135/2.8, CZJ Flektogon 35/2.4, CZJ Pancolar 50/1.8 zebra, CZJ Sonnar 135/3.5, ...
altroformato
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Irrbloss
Joined: 06 Jul 2011 Posts: 3 Location: Stockholm, Sweden
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Posted: Wed Jul 06, 2011 8:59 pm Post subject: |
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Irrbloss wrote:
I dont understand what went wrong but thanks for geting it done for me! _________________ Civilisation is measured in the amount of commonly owned/mantained/used parts of the society. |
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ludoo
Joined: 18 Sep 2009 Posts: 1397 Location: Milan, Italy
Expire: 2011-12-05
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Posted: Wed Jul 06, 2011 9:00 pm Post subject: |
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ludoo wrote:
Irrbloss wrote: |
I dont understand what went wrong but thanks for geting it done for me! |
Antispam measure, image links for the first post of a new user don't work. You'll be fine now. _________________ My galleries
Digital: Samsung EX-1
Past Digital: Samsung NX10, Sigma SD9, Sigma SD10, SD14, DP2, Pentax *istD, Kx, Fuji S2 Pro, Canon 5D
Analog: packfilm Polaroids, 6x9 Kodak folders, Pentacon Taxona half-frame, Fujica ST605n, Walz Envoy, Olympus 35 S-II, Olympus Wide S
Past Analog: Polaroid 600se, Polaroid 110B, Canon IIF, various fixed-lens and Russian rangefinders, ...
Past Lenses: Nikkor 24/2.8, Nikkor SC 50/1.4, Nikkor 50/2, Nikkor H 85/1.8, Nikkor P 105/2.5, Nikkor Q 135/3.5, Fujinon 100/2.8, Fujinon EBC 100/2.8, Fujinon EBC 135/3.5, Fujinon EBC 200/4.5, Mamiya SX 135/2.8, CZJ Flektogon 35/2.4, CZJ Pancolar 50/1.8 zebra, CZJ Sonnar 135/3.5, ...
altroformato
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Irrbloss
Joined: 06 Jul 2011 Posts: 3 Location: Stockholm, Sweden
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Posted: Wed Jul 06, 2011 9:06 pm Post subject: |
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Irrbloss wrote:
Ahhh...well thats good to know. _________________ Civilisation is measured in the amount of commonly owned/mantained/used parts of the society. |
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WolverineX
Joined: 19 Apr 2009 Posts: 1694 Location: Zagreb , Croatia , Europe
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Posted: Thu Oct 20, 2011 6:38 pm Post subject: |
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WolverineX wrote:
#1
_________________ my tools:Oly E-M5 + 45mm/1.8 + Oly E-520 + 12-60 + 14-42 + 70-300 + Sigma 105mm + FL-50R + EC20 + SRF-11 ring flash
http://forum.mflenses.com/wolverinex-testing-my-lenses-series-link-list-t39524.html |
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Pancolart
Joined: 04 Feb 2008 Posts: 3693 Location: Slovenia, EU
Expire: 2013-11-18
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Posted: Fri Mar 22, 2013 10:46 pm Post subject: |
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Pancolart wrote:
Beautiful chunky cemented elements that give lenses the edge: Pentacon (Meyer) 2.8/135mm and Jupiter 4/200mm.
_________________ ---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Pancolart
Joined: 04 Feb 2008 Posts: 3693 Location: Slovenia, EU
Expire: 2013-11-18
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Posted: Mon Apr 22, 2013 9:26 am Post subject: |
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Pancolart wrote:
It seems to me both Meyer / Pentacon Orestor 2.8/100mm and 2.8/135mm are still listed as Primoplan designs with wrong scheme.
Both lenses have nearly the same design (135mm in my previous post):
Orestor 2,8/100 by alf sigaro, on Flickr _________________ ---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS |
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edri
Joined: 26 Oct 2014 Posts: 315 Location: walking in the air
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Posted: Sun Feb 15, 2015 8:19 am Post subject: |
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edri wrote:
One can find somewhere this pdf? Excellent these previous lists.
no-X wrote: |
Relayer: Done
+ added some other designs: fujinon/unar, elmar, orthoscope, tair, hektor, telyt...
list of triplets, v.5:
PDF: high quality / optimized |
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woodrim
Joined: 14 Jan 2010 Posts: 4060 Location: Charleston
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Posted: Sun Jul 05, 2015 3:06 pm Post subject: |
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woodrim wrote:
Spotmatic wrote: |
Tremendous work, thank you! I have stored it locally for future reference. |
Here too. Thank you very much for that valuable reference. _________________ Regards,
Woodrim |
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duckrider
Joined: 11 Dec 2013 Posts: 437 Location: Germany
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Posted: Mon Jul 06, 2015 12:28 pm Post subject: spherics adieu! |
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duckrider wrote:
looking at these lens desings for smartphones makes me drunken:
http://bit.ly/1yrwgiM
link comes originally from Zeiss page:
http://blogs.zeiss.com/photo/de/?p=5280
Kind regs
Thomas _________________ T*homas
(from the origin land of Zeiss, an obligation )
Zeiss ZF 3.5/18, 2.8/25, 2.0/35, 2/50macro, 1.4/50, 1.4/85, 2/100macro
Nikon Df, F2AS, F2A, F3/T, FM
ALPA 11Si, Angulon 2,8/35 ; Xenar 1,9/50 ; Tele-Tessar 4/200
Leica R3 SAFARI Safari Lenses 2.8/28 ; 2/50 ; 4/180
Rolleiflex SL 350 , Zeiss 2,8/16 ; 4/18 ; 2,8/25 ; 2,8/35 ; 1,4/35 ; 1,8/50 ; 2,8/85 ; 1,4/85 ; 4/135 ; 4/200
Leica M9-P, Leica M4-2, Tri-Elmar "Wate", Distagon 2,8/21, Biogon 2,8/28, Biogon 2/35, Planar 2/50, Tessar 4/85, M-Elmar 50mm, Summicron 90
Sony alpha 7r & adapters for all lenses above |
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francotirador
Joined: 17 Sep 2009 Posts: 894
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Posted: Mon Jun 11, 2018 11:42 pm Post subject: |
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francotirador wrote:
Does anyone know what optical scheme has the Color Lanthar 50 2.8 of the Voigtlander Vitoret DR?
Thank you very much. |
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calvin83
Joined: 12 Apr 2009 Posts: 7547 Location: Hong Kong
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Posted: Tue Jun 12, 2018 3:50 am Post subject: |
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calvin83 wrote:
francotirador wrote: |
Does anyone know what optical scheme has the Color Lanthar 50 2.8 of the Voigtlander Vitoret DR?
Thank you very much. |
It is a triplet. _________________ https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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