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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Mon Dec 03, 2012 4:08 pm Post subject: Spiratone Plura-coat Minitel 100mm F2? |
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Velectron wrote:
Hi everyone,
I came across this Spiratone lens marked as Spiratone Plura-coat Minitel 100mm F2. Couldn't find anything on the net on this lens.
Does anyone know anything about this lens? Not sure if this is a Sigma or Tokina-made lens. Filter diameter is 58mm.
Another one in different mount
Last edited by Velectron on Mon Dec 03, 2012 4:19 pm; edited 2 times in total |
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hifisapi
Joined: 25 Sep 2012 Posts: 941 Location: USA
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Posted: Mon Dec 03, 2012 4:13 pm Post subject: Re: Spiratone Plura-coat Minitel 100mm F2? |
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hifisapi wrote:
Velectron wrote: |
Hi everyone,
I came across this Spiratone lens marked as Spiratone Plura-coat Minitel 100mm F2. Couldn't find anything on the net on this lens.
Does anyone know anything about this lens? Not sure if this is a Sigma or Tokina-made lens. Filter diameter is 58mm.
Another one in different mount
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I quoted your post to make it show up. _________________ ===========
ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
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Attila
Joined: 24 Feb 2007 Posts: 57849 Location: Hungary
Expire: 2025-11-18
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Posted: Mon Dec 03, 2012 4:15 pm Post subject: |
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Attila wrote:
Welcome, nice to see you here! Must be rare I never seen it, my guess is Tokina and excellent stopped down. If you have it already please share photos taken with this lens. _________________ -------------------------------
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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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Mon Dec 03, 2012 4:19 pm Post subject: |
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Velectron wrote:
Thanks for helping to make the pictures show up. I tried to upload instead of using direct links but it seems to screw thing up worse.
I do pay attention to Spiratone lenses but this is the first time I have seen this lens.
I do not have this lens yet but may be able to update in a month or so.
Cheers! |
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hifisapi
Joined: 25 Sep 2012 Posts: 941 Location: USA
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Posted: Mon Dec 03, 2012 6:05 pm Post subject: |
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hifisapi wrote:
what is the lens mount? Pentax K? _________________ ===========
ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
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simbon4o
Joined: 19 Dec 2011 Posts: 390 Location: Bulgaria
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Posted: Mon Dec 03, 2012 7:20 pm Post subject: |
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simbon4o wrote:
photos with it? _________________ 10-300мм 4.0 - 1.2 - 4.5 NIKON&Sony bodies / Sony 10-18, Pentax 28 2.8 II, CZJ 35 2.4, Nikkor DX 35 1.8, Samyang 35 1.4, KMZ 50 1.7, FDn 50 1.2 L, Nikkor 55 2.8, Rokkor 58 1.2, Soligor 85 1.8 Preset, Samyang 85 1.4, Canon FDn 85 1.2 L, Tokina AT-X 90 2.5, Canon FDn 135mm 2.0, Nikkor 180 2.8 ED, Tair 300 4.5
________
snimo.net |
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Mon Dec 03, 2012 8:49 pm Post subject: |
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luisalegria wrote:
It does look more like a Tokina than a Sigma, but it could be nearly anything.
In any case this thing is certainly uncommon in any brand.
I have never heard of a 3rd party late 1970's 100/2. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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Pancolart
Joined: 04 Feb 2008 Posts: 3693 Location: Slovenia, EU
Expire: 2013-11-18
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Posted: Mon Dec 03, 2012 9:53 pm Post subject: |
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Pancolart wrote:
Interesting! _________________ ---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS
Last edited by Pancolart on Tue Dec 04, 2012 10:52 am; edited 1 time in total |
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stingOM
Joined: 27 Sep 2007 Posts: 3168 Location: Ireland
Expire: 2012-12-27
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Posted: Mon Dec 03, 2012 11:07 pm Post subject: |
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stingOM wrote:
Wow. That's a very uncommon looking lens.
It is however listed here:
www.jcolwell.ca/MM/listFocalLength.pdf
http://camera-wiki.org/wiki/Spiratone |
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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Mon Dec 03, 2012 11:29 pm Post subject: |
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Velectron wrote:
I just realised it could be related to the Soligor C/D 100mm F2, which is probably made by Tokina.
Same filter ring size and about the same size, but the DOF scale looks quite different. [edit: sorry for the mistake, the DOF scale are actually the same]
Last edited by Velectron on Fri Dec 28, 2012 2:35 pm; edited 1 time in total |
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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Thu Dec 27, 2012 11:53 am Post subject: |
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Velectron wrote:
Just an update.
I managed to grab both lenses and just got them today.
One is Canon FD and another one is Pentax K-mount. But unfortunately....both had haze inside, on the 3rd element from the front
Managed to clean up the Canon but the Pentax one cannot be saved. The coatings are degraded. Strange to have both lenses having haze in the exact same surface of the same element!
And behold, these two 100mm F2 are the exact same lens as my Soligor MC 100mm F2, as I had guessed earlier! Same design, same construction, same lens elements. Probably made by Tokina.
More to update later! |
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dimitrygo
Joined: 01 Apr 2009 Posts: 561
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Posted: Thu Dec 27, 2012 2:45 pm Post subject: |
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dimitrygo wrote:
Velectron wrote: |
Just an update.
I managed to grab both lenses and just got them today.
One is Canon FD and another one is Pentax K-mount. But unfortunately....both had haze inside, on the 3rd element from the front
Managed to clean up the Canon but the Pentax one cannot be saved. The coatings are degraded. Strange to have both lenses having haze in the exact same surface of the same element!
And behold, these two 100mm F2 are the exact same lens as my Soligor MC 100mm F2, as I had guessed earlier! Same design, same construction, same lens elements. Probably made by Tokina.
More to update later! |
Can you post some pictures of your Soligor or at least say its serial number? |
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Thu Dec 27, 2012 10:06 pm Post subject: |
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luisalegria wrote:
Degraded coatings aren't a huge problem.
The effects of coatings are cumulative on all surfaces.
So is the effect of lack of coatings.
So if just one surface has a problem, out of perhaps 8 surfaces in a 4-group lens, I don't think it would have much effect. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Fri Dec 28, 2012 2:15 pm Post subject: |
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Velectron wrote:
Here are the pictures of the 3 lenses. Sorry for the quick snapshots.
Soligor at bottom. Serial number starts with 279xxxx. Does this actually means this is made by Sun Optical in 1979 instead of Tokina as I had though earlier?
Soligor is at the extreme left
Some quick snapshots pics with NEX 5N and the lens with degraded coating.
Wide open until about F2.8, the lens is glowy. At F2.8 onwards, contrast and sharpness starts to improve significantly.
Regarding the lens formula, i can report that it consists of a total of 6 elements in 2 main groups. Front group consist of 4 elements - 2 separate front elements and a fused 2-element group in front of the diaphragm. Rear group consist of 2 elements fused together. |
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Fri Dec 28, 2012 4:09 pm Post subject: |
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luisalegria wrote:
In the usual convention, your lens would be called 6 elements in 4 groups. A "group" would be any unit of glass, whether it is made of one, two or three cemented pieces.
This lens therefore, because it has four groups, has eight coated surfaces.
Which surface is bad, and in what way ?
Bad coating wont created a "glow" - which seems like typical spherical aberration, which should be expected on a lens with a simple formula but large aperture.
Bad coating may reduce contrast, but one out of eight should not be very noticeable. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Sat Dec 29, 2012 2:16 am Post subject: |
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Velectron wrote:
Yes I agree with you. The glow is not because of the damaged coatings but because of spherical aberrations. It is present in all 3 lenses.
The coating is damaged on the front surface of the 3rd group from the front, i.e., the 2 fused elements in front of the diaphragm. If you look through the lens, it looks a bit like fungus (pale, slightly whitish) but is not fungus. Not that obvious when viewed from front but more obvious when viewed from the rear.
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luisalegria
Joined: 07 Mar 2008 Posts: 6627 Location: San Francisco, USA
Expire: 2018-01-18
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Posted: Sat Dec 29, 2012 6:21 am Post subject: |
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luisalegria wrote:
Have you tried cleaning it ?
I can't tell from the picture, but it looks like the problem could be condensate deposits.
Its also possible that it is signs of separation.
You should be able to tell if you can open the lens and get to this surface. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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Velectron
Joined: 03 Dec 2012 Posts: 13 Location: Singapore
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Posted: Sat Dec 29, 2012 6:34 am Post subject: |
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Velectron wrote:
Yup, tried cleaning and polishing. Helped a little but not too much. Looks like some etching had took place.
Its on the outer surface, definitely not separation. |
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