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montecarlo
Joined: 04 Apr 2007
Posts: 1865
Location: Romania
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 Posted: Thu Jan 10, 2008 7:16 am Post subject: Pentacon 100 and Meyer 180 with sticky iris blades |
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montecarlo wrote:
Hello,
I have the opportunity to buy two lenses . These are:
Pentacon 100mm f:2.8
and
Meyer Optik Gorlitz Primotar 180 f:3.5 (http://www.mflenses.com/gallery/v/german/meyer/primotar_180mm_f3_5/)
but both has sticky iris blades.
What to do ? Can the diaphragm cleaned easily (can the lens be dismantled and have easy access to the blades) ?
Thank you.
_________________
Canonet QL17 III
Zenit E , Helios-44 58mm f:2.0 , Tair-11A 135mm f:2.8, Jupiter-9 85mm f:2.0,
Carl Zeiss Jena Flektogon 35mm f:2.4
Pentax MX, ME Super, Chinon CE4/CM4, Petri MC 28mm f:2, smc Pentax-M 50mm f:1.7, Soligor T 135mm f:2.8
Minolta X500, Tokina 28/2.8, Rokkor 50/1.7, 80-205/4.5
Nikon D90, Nikkor 35/2.0, Nikkor 50/1.8, Sigma 24/2.8, Nikkor 18-105 VR |
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Thu Jan 10, 2008 7:48 am Post subject: |
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Attila wrote:
Pentacon 100mm f2.8 a wonderful lens , usable very well even at wide open. Another one wide open very soft I am not sure you will lake it. To clean blades need practice I am not sure you able to do it by your self. Here an experts can clean it around 15-20 EUR each ask at your home place who able to clean it before decide to buy Primotar.
_________________
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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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Nelson
Joined: 06 Jan 2008
Posts: 618
Location: close to Paris, France
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| Posted: Thu Jan 10, 2008 9:34 am Post subject: |
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Nelson wrote:
it depends on the lenses
On Pentacon 200 F4 MC, it is easy to clean the blades. (but this is note the reason of the problem on my lense, the reason is still unknown).
I believe on Pentacon 135 f2.8 MC, it is also easy.
this is just my testimony |
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Helios
Joined: 05 Jan 2008
Posts: 537
Location: East of France
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| Posted: Thu Jan 10, 2008 1:25 pm Post subject: |
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Helios wrote:
The meyer primotar 3,5/180 has a preset diaphragm , an automatic version exists in Pratisix mount .the preset version has an interchangeable mount for P-6,Exakta,Praktica(M-42), Praktina . It cannot be "sticky"!. Or something is broken elsewhere , and the preset ring cannot move. Have you got pics from this lens ?
The pentacon 2,8/100 (Meyer orestor) is quite easy to dismantle . It is like the pentacon 2,8/135 , at least not so far.
Last edited by Helios on Thu Jan 10, 2008 1:34 pm; edited 1 time in total |
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Flor27
Joined: 13 Sep 2007
Posts: 1195
Location: Paris, France
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| Posted: Thu Jan 10, 2008 1:33 pm Post subject: |
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Flor27 wrote:
| Helios wrote: |
| The meyer primotar 3,5/180 has a preset diaphragm . It cannot be "sticky"!. |
What does a preset diaphragm has to do with blades ? I own sticky J-9, Pentacon 300/4, both are preset lenses.
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Switching from M42 to Minolta MD & Contax/Yashica |
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Helios
Joined: 05 Jan 2008
Posts: 537
Location: East of France
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| Posted: Thu Jan 10, 2008 1:52 pm Post subject: |
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Helios wrote:
?? Sticky blades don't prevent the use of the preset ring. Blades are directly connected to the closing ring , so sticky or not , the diaph is usable. However , the closing action can be more difficult .
Depending of course what we call "sticky" . I'd never seen a preset totally stuck blades . |
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montecarlo
Joined: 04 Apr 2007
Posts: 1865
Location: Romania
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| Posted: Thu Jan 10, 2008 2:50 pm Post subject: |
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montecarlo wrote:
Well the deal is off  The person to whom I sent a Pentacon 135mm lens this monday give me a address which was not identical with the one in his ID so the postal employee did not give him the package. I'll do the whole shipping again (return and shipping again). Here I use here (Romania) the payment on arrival (pay the parcel when it arrives at the postal office). So, got no money now, for lenses. And those two lenses (Meyer and pentacon 100) would have been about 12 GBP (shipping included).
May be some other time.
Thank you all.
_________________
Canonet QL17 III
Zenit E , Helios-44 58mm f:2.0 , Tair-11A 135mm f:2.8, Jupiter-9 85mm f:2.0,
Carl Zeiss Jena Flektogon 35mm f:2.4
Pentax MX, ME Super, Chinon CE4/CM4, Petri MC 28mm f:2, smc Pentax-M 50mm f:1.7, Soligor T 135mm f:2.8
Minolta X500, Tokina 28/2.8, Rokkor 50/1.7, 80-205/4.5
Nikon D90, Nikkor 35/2.0, Nikkor 50/1.8, Sigma 24/2.8, Nikkor 18-105 VR |
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Thu Jan 10, 2008 7:09 pm Post subject: |
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Attila wrote:
| Quote: |
| And those two lenses (Meyer and pentacon 100) would have been about 12 GBP (shipping included). |
Is it real ? This is the price of these two lenses ??!!
_________________
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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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Pancolart
Joined: 04 Feb 2008
Posts: 3693
Location: Slovenia, EU
Expire: 2013-11-18
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| Posted: Mon Jun 02, 2008 3:18 pm Post subject: Pentacon 100mm construction |
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Pancolart wrote:
Hi!
Could someone please let me know how should one before last element be turned in the lens? I had it disasambled and forgot how it was:(.
Thanks. |
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estudleon
Joined: 15 May 2008
Posts: 3754
Location: Argentina
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| Posted: Mon Jun 02, 2008 4:36 pm Post subject: |
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estudleon wrote:
HI.
Let me know:
Which lens we are talking about?
_________________
Konica 2,8/100
CZJ: 4/20, 2,4/35, 1,8/50 aus jena, 3,5/135MC, Pentacon 1,8/50
Pentax S-M-C-1,4/50
Helios 44-3
Mamiya 2,8/135
Misc. : jupiter 9
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Asahi pentax spotmatic super takumar 1,4/50
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Leica R3 electronic summicron 2/50 elmarit 2,8/35
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Minolta XG9 2,8/35, 2/45, 3,5/135
Nikkormat FTn 1,4/50, 2,8/135
Fujica ST 801, 605, 705n. 3,5/19, 1,4/50, 1,8/55, 4/85, 3,5/135.
Praktica MTL 5 and a lot of M42 lenses.
Voigtlander. Bessamatic m, bessamatix de luxe, bessamatic cs, ultramatic and ultramatic cs.
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Canon AV1, 1,8/50
Rolleiflex SL35 and SL35 E. 2,8/35 angulon, 2,8/35 distagon, 1,4/55 rolleinar, 1,8/50 planar, 4/135 tessar, 2,8/135 rolleinar, x2 rollei, M42 to rollei adap.
Etc.
RF
Yashica Minister III
Voightlander Vito, vitomatic I, Vito C, etc.
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macrotak
Joined: 30 Dec 2017
Posts: 4
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| Posted: Fri Apr 03, 2020 10:14 am Post subject: |
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macrotak wrote:
I am looking (unsuccessfully) for dismantling info on Pentacon f2.8 135mm. Those available only cover the knurled focus ring variant. The inside of the variant with the thin, horizontally barred focus ring is totally different. Anyway, the point of this is to comment on an earlier assertion that you can't get 'sticky' blades with a preset aperture. I fear you CAN. If they are oily the oil will dry on storage and the blades will stick together. The force of turning the aperture ring will cause the offending blade to bind with its neighbour, distort and spring out of its slot, producing the classic, "Oh damn, what's happened to that?" situation. And that's why I want to dismantle this particular one!
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Even my Pentax DSLRs suffer from LBA |
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