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sceptic
Joined: 01 Jun 2013 Posts: 255
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Posted: Sun Nov 23, 2014 9:05 pm Post subject: Regreasing Flektogon 35/2.8 M42 preset - any ideas? |
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sceptic wrote:
I've regreased several lenses and understand the general principles involved in doing so, but this lens has me beat. I've opened the front and rear (removing all the optics in the process) and am now left with the barrel and aperture assembly intact.
I've read that removing the outer of the four retaining rings in the back is supposed to separate the focusing mechanism from the rest of the lens, but all I got out was the rear optic assembly.
There are no screws found on the barrel, and nowhere to "hide" a little grub screw either.
I have removed a plastic retaining ring (not the threaded type used for holding lenses in place, but the "springy" type with an opening) that seems to hold the aperture housing in place, as that was the only movable part I found inside the lens. I'd rather keep the aperture intact, they can be a pain to reassemble
Any ideas would be highly appreciated. _________________ Sony A7R and wildly varying flora of lenses |
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Ramon
Joined: 01 May 2007 Posts: 71 Location: Kent, UK
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Posted: Tue Nov 25, 2014 4:48 pm Post subject: |
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Ramon wrote:
This may help:
http://www.kolumbus.fi/uusilehto/img/lenses/zeiss/disass/slides/lens.html
To get to the helicoid you need to remove the front filter ring housing, normally by gripping it and turning in the usual anti-clockwise direction it will unscrew from the body, it will be stiff to start with and there could be a tiny grub locking screw on the side that can only be seen when the lens is fully extended, if so then remove this first. There are a few variations with this lens so your may be different.
Oh, and don't take that retaining ring out of the aperture assembly, unless you want lots of trouble. |
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sceptic
Joined: 01 Jun 2013 Posts: 255
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Posted: Wed Nov 26, 2014 1:49 pm Post subject: |
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sceptic wrote:
Thanks for the tip! I've tried unscrewing various parts of the barrel, without successivt, but not the filter ring.
The aperture housing is still intact, I've learned the hard way what happens when those paper thin blades come loose and need to be reinserted...
Unfortunately, the link is of little use; my lens looks almost nothing like that one (no screws in the mount, for instance) _________________ Sony A7R and wildly varying flora of lenses |
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sceptic
Joined: 01 Jun 2013 Posts: 255
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Posted: Tue Dec 02, 2014 9:16 am Post subject: |
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sceptic wrote:
Update: No luck with the filter ring. It is integrated in the preset-mechanism, so it can´t be turned.
Really frustrating to not find any "point of entry" on the lens.
Does anyone have any info on preset CZJ-lenses (other than Rick Oleson´s drawings and Zeiss manuals, I´ve read those)? _________________ Sony A7R and wildly varying flora of lenses |
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lucca1x
Joined: 09 Feb 2014 Posts: 93 Location: Romania
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Posted: Tue Dec 16, 2014 8:29 am Post subject: |
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lucca1x wrote:
Take a look at this:
http://k10dpentax.blogspot.ro/2008/05/cleaning-flektogon-35mm-chrome-barrel.html
I think that version from the link could be the version that you have. The name ring can be unscrewed with a special rubber tool. I remember the exakta mount black version of this lens can be opened the same way. If you don't have a set of rubber tools it could be difficult to unscrew the ring ... but first thing first: take a look at the link and see if it's the same lens. |
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Lloydy
Joined: 02 Sep 2009 Posts: 7776 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Tue Dec 16, 2014 11:17 am Post subject: |
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Lloydy wrote:
A cheap roll of electrical insulating tape makes a very good substitute for the rubber tool, just unwind tape until it is the right size, There's enough glue on the edge of the roll to make it sticky and give a good grip on the name ring. _________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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sceptic
Joined: 01 Jun 2013 Posts: 255
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Posted: Wed Dec 17, 2014 6:27 am Post subject: |
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sceptic wrote:
Thanks for the link, lucca1x. Yes, that is the same version as mine, but he only explains how to remove and clean the lens elements (which is very similar to most lenses, i.e. held in place with threaded retaining rings). Once all the lens elements are out, you are lett with an empty metal tube, with no screws to remove anywhere; not on the back, not in the front and not on the sides. I've pretty much given up the idea of regreasing the lens and will sell it "as is".
@Lloydy: great tip for a make shift rubber tool. I have, however, a full set of dedicated rubber tools in various sizes (a very good investment, by the way) so I'm covered in that department. _________________ Sony A7R and wildly varying flora of lenses |
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sceptic
Joined: 01 Jun 2013 Posts: 255
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Posted: Tue Dec 23, 2014 8:14 pm Post subject: |
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sceptic wrote:
Update: finally found the way in! I've read that there are four retaining rings on the back of the lens, keeping the optics in place and connecting the focusing mechanism with the rest of the lens. It turns out the fourth, outer ring was hidden under another retaining ring (similar to the name ring covering screws on the front). _________________ Sony A7R and wildly varying flora of lenses |
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mo
Joined: 27 Aug 2009 Posts: 8982 Location: Australia
Expire: 2016-07-30
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Posted: Tue Dec 23, 2014 11:26 pm Post subject: |
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mo wrote:
That is good news,you didn't take any photos did you of this last ring? _________________ 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
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sceptic
Joined: 01 Jun 2013 Posts: 255
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Posted: Wed Dec 24, 2014 11:47 am Post subject: |
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sceptic wrote:
mo wrote: |
That is good news,you didn't take any photos did you of this last ring? |
Actually, no. But, since you asked:
Back of Flektogon 35/2.8 M42 alu by scepticswe, on Flickr
It's the ring just behind (or above, in the picture) the mounting threads. _________________ Sony A7R and wildly varying flora of lenses |
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