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Forum: Pentax SLR Lens Discussion
07-03-2022, 07:56 PM
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Hello abubela,
It has been a few years when I did this and I can't remember correctly how I separate the cemented lenses. If my memory serve me well, I use a hot air blower to separate them, not using the boiling water method.
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Forum: Pentax SLR Lens Discussion
04-27-2022, 11:52 PM
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thanks for the guidance. I'm too lazy to do now, lol
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Forum: Pentax SLR Lens Discussion
01-17-2019, 07:41 PM
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yes, i'm using it now without any cementing, just that wide open at f1.4 a lot of flair, f2.8 to f5.6 is the sweet spots
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Forum: Pentax SLR Lens Discussion
10-02-2018, 05:53 PM
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Besides Canadian balsam, you can use epoxy or UV curable glass cement but once you use it, it's harder for you to separate them in future if compare to Canadian balsam.
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Forum: Pentax SLR Lens Discussion
12-26-2017, 07:57 AM
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Alright, here are some finished assembly pics of the lens after done the cleaning:
And below is the photo taken by that lens:
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Forum: Pentax SLR Lens Discussion
08-08-2017, 08:24 AM
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Some in progress photos for the lens disassembly:
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Forum: Welcomes and Introductions
08-08-2017, 08:18 AM
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Forum: Pentax SLR Lens Discussion
07-27-2017, 01:43 AM
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Forum: Pentax SLR Lens Discussion
07-26-2017, 06:19 PM
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OK, thanks for the tips...
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Forum: Pentax SLR Lens Discussion
07-24-2017, 07:33 PM
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Yes, you are right, some of the element got some serious fungus but it is easy to clean up.
---------- Post added 07-24-17 at 07:37 PM ----------
Do you know which lens elements with the coating and how to identify those coating and how to tell if the coating is still good?
I'm not sure if I will use boiling water method or will use hot air gun to slowly heat up the group lens to separate them yet. I need to think of how to take out the group lens from underneath the aperture assembly first.
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Forum: Pentax SLR Lens Discussion
07-24-2017, 07:27 AM
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Thanks for the tips and guidance on the rejoin process.
---------- Post added 07-24-17 at 07:30 AM ----------
Thanks for the info on how to remove the center group lens which I'm stuck currently. So I will try to pull out the aperture assembly after removing the 3 worm screws that held on top of the aperture assembly from the center assembly. Thanks for the tips on the lens group repair process as well.
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Forum: Welcomes and Introductions
07-24-2017, 12:53 AM
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sure, my pup called "black mouth" in our local dialect ,lol. Just playing around with the f1.7 lens around my house, nice lens and easy to capture my subject in focus.
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Forum: Pentax SLR Lens Discussion
07-24-2017, 12:49 AM
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Hello all,
I just got my Asahi Pentax-M 50mm f1.4 in very bad condition (at a very cheap price with a vintage Pentax-ME, flash light, zoom lens and 2x tele-converter). I'm trying to clean it up over the weekend and I found that the center group lens unable to clean up after several attempts. This lens contains 7 lens in 6 groups, so that means got 2 lens obviously in 1 of the group and it's balsam glued together. I'm trying to disassembly the center unit until I'm stuck in removing the group lens out from the unit. Photos as below is where I'm currently stuck at. Any one of you know how to remove this group lens and remove the hazy glue and re-glue it back?
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Forum: Welcomes and Introductions
07-23-2017, 10:40 PM
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Nice to meet you guys and girls here that link photography, especially with Pentax camera.
I just got myself a used Pentax K-r, with the kit lens and also the Pentax-F 50mm f1.7, also a wide angle vivitar lens 17-28mm if not mistaken.
Starting to play with old vintage lens and got myself a Asahi Pentax-M SMC 50mm f1.4
Some of the photo below, enjoy and please comment if any. Newbie here and still learning.
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