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Kathmandu
Joined: 09 Dec 2009 Posts: 1479 Location: (Kathmandu,Nepal. Currently)Pacific Northwest, USA
Expire: 2012-04-08
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Posted: Sat Oct 02, 2010 4:25 am Post subject: Spiratone Expandar Wide Angle 28mm f2.8 |
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Kathmandu wrote:
Got this lens a few months ago as a project lens for $5.00 from a local consignor when I bought some lenses from him. The lens mount was gone, looked like may have been a T-mount . The focus ring felt like it was glued down-no sign of any movement. I brought it back and applied lighter fluid, alcohol, I even used acetone to no avail. The great thing was the elements were in perfect shape and accessible easily. I took the focusing ring and distance marker label out.I soaked the focusing threads in lighter fluid overnight with no results so I put it away for a rainy day project.
My "loosening focusing ring" moral has recently gone up since my success withe Sun lens in my latest project. I took the elements out and used the heat gun on the exposed helical assembly.
The heat did the trick to reveal a dried and gummed up inside.
I cleaned inside the threads of the brass ring that holds the focus ring-with alcohol and naptha on Qtip swabs(lots of it) and cleaned the residue in the grooves with toothpicks soaked in alcohol(lots used) .
After the threads were dry I coated all threads and grooves with the SpeedX lubricant. I wiped this dry with cloth like I was cleaning it . I then applied more lubricant. This lens needed a small amount as the threads and grooves were very fine -you may need more for other lenses that have wider threads and grooves to dampen the possibility of "wobbly focus ring"- the consistency of the grease would have to be thicker too.
Screwed the ring on(the ring you mount the focus ring on to with set/grub screws)-the movement is very fluid now.
Screwed on the next ring(this holds the distance label marker -by means of 2 set/grub screws). It is also the mounting boss for the T-mount.
Screwed the focus ring on , and the distance label ring-both temporarily with one screw each. I then screwed on the new Minolta AF T-mount adapter. I tested for infinity focus on my Sony DSLR and had to rotate the focus ring and the ring under it until I achieved infinity at the infinity marker. Having done this I proceeded to svrew in all set/grub screws on the 2 rings until secure.
There were 2 limiting screws -located in the slots on the side of the back cells hat prevents the back element from rotating as you focus but allows it to slide in and out. I had taken these out in the beginning, I put them back on now. i took the back element out and cleaned it with naptha, alcohol and wiped it off with lens tissue. The lens tissue was folded in 4 fold so I did not contaminate it with any oils from my finger.
Put back element back in screwed down retaining ring and then the knurled ring to cover it all up-lastly .
This lens was now ready to be mounted and used- from dead weight to gem.
I have documented this hoping it helps someone-I may not have been very thorough. I will gladly reply if you have any queries, or if I missed something.
I have posted some images taken with this lens in the other sub-forum.
Regards
Last edited by Kathmandu on Sun Oct 03, 2010 4:42 am; edited 1 time in total |
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martyn_bannister
Joined: 23 May 2010 Posts: 1151
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Posted: Sat Oct 02, 2010 9:40 am Post subject: |
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martyn_bannister wrote:
I know how long it takes to photograph and describe a process like this. Thanks for doing so and posting for ecveryone's benefit. |
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fatdeeman
Joined: 13 Jun 2009 Posts: 780 Location: UK
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Posted: Sat Oct 02, 2010 9:43 am Post subject: |
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fatdeeman wrote:
Yes thank you for taking the time and effort to do this for us! _________________ - Dave
www.lensporn.net
www.flickr.com/photos/fatdeeman/
DSLR: Canon EOS 60D, Samsung GX-1S (Pentax *ist DS2)
Mirrorless: Panasonic DMC-G1, Sony NEX-5N
Compact: Canon PowerShot G3
Lenses:
Wide: Tokina RMC 28mm F/2.8, Tamron Adaptall 2 28mm F/2.5, Sun Optical 28mm F/2.5, Super paragon 28mm F/2.8, Sigma filtermatic 24mm F/2.8, Fujinon 35mm F/2.8, Sun Optical 35mm F/2.8
Standard: Industar 50-2, Helios 44-2, Helios 44M, Helios 44M-3, Pentax-M 50mm F/1.4, Pentax-M 50mm F/1.7, Pentax-M 50mm F/2, Ricoh 50mm F/1.7, Chinon 50mm F/1.7
Tele: Pentacon 135mm F/2.8, Pentacon 200mm F/3.5, Optomax 200mm f/3.5, Sun Optical 135mm F/3.5, Soligor 350mm F/5.6
Zoom: Tokina 28-70mm f/3.5-4.5 SZ-X270 SD, Sigma Zoom Pi 35-200mm F4-5.6, Sun Optical 28-80mm F/3.5-4.5, Sunagor 80-205mm F/3.8, Tokina RMC 80-200mm F/4, Vivitar 70-150mm F/3.8, Tamron 95-205mm F/6.3, Tamron Adaptall 28-200mm F/3.8-5.6 LD Aspherical, Tokina RMC 70-210mm F/3.5
Mirror: Falcon (Samyang) 800mm F/8, MTO-11CA 1000mm F/10, Tamron Adaptall 2 500mm F/8
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walter g
Joined: 20 Feb 2010 Posts: 2463 Location: NC, USA
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Posted: Sat Oct 02, 2010 11:53 pm Post subject: |
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walter g wrote:
Nice job fixing the Komine lens. Nice documentation.
This thread is also really handy for the people that have the Soligor 28mm f2.8 version of this lens. _________________
Main cameras
Panasonic G5,Nikon J1,Pentax Q10,Sony Nex 6
Minolta MC W SI 2.5/28, MD 2.8/28, MC W SG 3.5/28, MC Celtic 3.5/28, MC W HG 2.8/35, MD Celtic 2.8/35, QE 4/35, Rokkor X 2/45, MC Rokkor X PG 1.4/50, MC Rokkor X PG 1.7/50, MD Rokkor X 1.7/50, MD 2/50, MC Rokkor PF 1.7/55, MC Rokkor PF 1.9/55, Auto Tele Rokkor PG 2.8/135, MC Tele Rokkor QD 3.5/135, TC 4/135, MC Celtic 4/200, MC Tele Rokkor PE 4.5/200
MD 28-70 f3.5-4.8, MD Macro 35-70 f3.5, Md 70-210 f4, MD Rokkor X 75-200 f4.5, MD 100-200 f5.6
Nikon Nikkor 4/20, O Auto 2/35, S Auto 1.4/50..... Miranda Auto 2.8/28, Auto 2.8/35, Auto 1.4/50, Auto EC 1.4/50, Auto 1.8/50, Auto EC 1.8/50,Auto 1.9/50, Auto 3.5/135
Various Soligor,Sun,Fujita,Komura,Spitatone, etc. Lenses
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Kathmandu
Joined: 09 Dec 2009 Posts: 1479 Location: (Kathmandu,Nepal. Currently)Pacific Northwest, USA
Expire: 2012-04-08
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Posted: Sun Oct 03, 2010 4:42 am Post subject: |
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Kathmandu wrote:
Thank you all |
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