truls
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Post by truls on Oct 18, 2012 16:10:17 GMT -5
It seems as a good purchase. Don't know much about Yashica, so I may have to get one.
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truls
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Posts: 568
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Post by truls on Oct 18, 2012 16:05:01 GMT -5
Happy Birthday, hope you get a lot of cameras!
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truls
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Posts: 568
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Post by truls on Oct 14, 2012 8:03:57 GMT -5
The new Tenax I test after cleaning was not promising, something must have been wrong during reassembly. There is a loss of sharpness. Could the middle lens element have been reversed mounted or misaligned? The church, bad lightning conditions: I will investigate this, doing a new assembly. Fomapan ISO400 1/100 @f.5.6 Normal development in fomadon R09 No lens hood or filter
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truls
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Posts: 568
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Post by truls on Oct 11, 2012 17:19:20 GMT -5
The assembling of Tenax I has begun. All lens elements looks clean and shiny. This has been a great experience for me. Thanks to all comments and advice. I will take some new shots tomorrow. Here is the aperture assembly, it also worked afterwards
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truls
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Post by truls on Oct 11, 2012 6:55:49 GMT -5
I will do the cleaning several times, and apply the advice from Stephen, thanks!!
It looks like dust but it is not, the picture is a close up which shows what the eye not is able to see unless enlarged.
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truls
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Post by truls on Oct 11, 2012 6:47:21 GMT -5
A lens hood for the Tenax I could easily be made from an used 35mm film cartridge, just cut it in half and apply with some Scotch tape, it will fit nicely. The lens is exposed to unwanted light and a hood comes in handy. Maybe it should be painted inside black matte to reduce light stray.
If picture quality is most important Tenax I is not the camera of choice. I like the old look of the pictures, and if I can improve the quality by doing som lens cleaning I am happy. Anyway it is a nice camera showing a bit of camera history at the time. peltigera's shots are sharp but shows the same artifacts as my pics.
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truls
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Posts: 568
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Post by truls on Oct 10, 2012 6:19:04 GMT -5
Now I need an expert opinion. I have cleaned the lens elements but a close up exmination shows some artifacts in the lens, what could it be? Is this due to age or maybe fungus? It looks like air bubbles, but don't know... It is non-cleanable.
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truls
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Posts: 568
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Post by truls on Oct 9, 2012 7:43:06 GMT -5
GULP Now ready to clean lens. I am afraid Mickey and Berndt was right, this will maybe never put together again? It could of course be framed and make a nice view on the wall... In the front we can se the front, middle and rear lens element. The aperture will be a puzzle to assemble.
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truls
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Posts: 568
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Post by truls on Oct 8, 2012 13:09:52 GMT -5
I had to unscrew the outside ring, here: then I had this: Here is what the inner remainings of the lens looks like: There is a small screw in the lens, should I disassemble? If this is the aperture will it fall apart or something? I assume I am ready to shop some detergents now Also I am concerned of what to do now...
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truls
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Posts: 568
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Post by truls on Oct 8, 2012 4:16:44 GMT -5
Rachel, you at Camera Collector has inspired me to dare this. In the end if this can make a tutorial for others we have a success. Time will tell. Some more progress. So far this has been a fairly simple operation, I believe now comes the hard part. Well, the lens could at this point removed by turning it counter clockwise. Here we can se the lens taken off: The lens from behind: The front:
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truls
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Post by truls on Oct 7, 2012 14:31:57 GMT -5
I must be blind... After removing the protruding screws the distanse scale fell off. There a more very tiny screws to take off, i will continue later.
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truls
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Posts: 568
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Post by truls on Oct 7, 2012 14:06:49 GMT -5
As I look at the shots of the lens I see more to unscrew. My eyes are not as they was before...
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truls
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Post by truls on Oct 7, 2012 14:03:04 GMT -5
Thanks Stephen, I will continue tomorrow as it is evening here now. Here are some pictures from the side of the camera. Upper side: Right side (seen from behind the camera): Left side (seen from behind the camera): Bottom:
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truls
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Posts: 568
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Post by truls on Oct 7, 2012 10:35:40 GMT -5
I think you have two options. Full manual exposure, you deside shutter speed and aperture. Second I assume you can use aperture priority, you pick an aperture, and the camera choose shutter speed. I remember the T70 displays selected shutter speed in the top display, not in the viewfinder.
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truls
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Posts: 568
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Post by truls on Oct 7, 2012 10:29:03 GMT -5
I will try to dismantle the tenax to clean the lens. This is somewhat a new experience, so if someone have any propositions now I can get further. The work stopped due to no more tiny screws to unscrew... Here are some pictures: I did remove the four screws, and removed 3 small covers. Here is the inside of the back after removing the four screws and covers. Then I removed four tiny (really tiny) screws from the focus ring. The lens becomes somewhat loose but it wil not come off. Here are the disassembled parts. Well, what to do now? Should I put some force to get off the lens?
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