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07-13-2016, 11:59 PM   #16
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Thanks, but the problem is, that I can not focus at 0.45m. itīs blocked. The Limit is between 0.55 and 0.6m (as you can see on one of the pictures).
=( I didnīt know where the error is.

07-14-2016, 01:36 AM   #17
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QuoteOriginally posted by MilkaSchokoHase87 Quote
Thanks, but the problem is, that I can not focus at 0.45m. itīs blocked. The Limit is between 0.55 and 0.6m (as you can see on one of the pictures).
=( I didnīt know where the error is.
loose the screw on the focus barrel and adjust it and re tighten it
07-14-2016, 03:31 AM   #18
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thanks, but I hope to get solved my problem of close focus

---------- Post added 07-14-16 at 03:38 AM ----------

QuoteOriginally posted by niceshot Quote
loose the screw on the focus barrel and adjust it and re tighten it
would be fine if it will be as easy, but for this I had to do some dissambling first =(
07-14-2016, 06:27 AM   #19
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Here is your problem.

See these pieces:


The piece on the left is actually two pieces. the ring with the silvered portion unscrews from the focus ring. Once you separate the two, you can fully reassemble everything (including the optical assembly) except for the front barrel (held in by three screws from the side) and that ring and then fine tune the infinity focus by loosening the screws on the inner brass ring with, which will now be accessible from the front.Once it is adjusted to your satisfaction, then re-attach the barrel and the ring, and you will be all set.

If this doesn't solve your close focus problem. Then you will need to back the lower half of the helical out by a turn or two before inserting the guide rails in order to to allow the focus throw to extend further forward, then set infinity using the procedure detailed in the previous paragraph.

Note that the thread entry points on the front half of the helical don't much matter, since by making the adjustments listed above, you can generally achieve the full focus range from any entry point.


Last edited by dcshooter; 07-14-2016 at 08:39 AM.
07-14-2016, 08:24 AM   #20
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Great Thanks, I will try it tonight and let you know tomorrow =).
07-16-2016, 12:45 PM   #21
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Great Thanks for the trick DCShooter and thanks a lot to all helpers.
I fixed it for a little bit. Now close focus is at near 0.53 m but not at 0,45.
For me itīs okay and I decided to use it like this. Maybe I fix it later but I think Itīs okay for me to have 10cm lost.

Here are some more examples
1) F1.2_at infinity
2) F4_at infinity
3) F1.2_at infinity
4) close focus (about 55cm) @ F1.2
5) close focus (about 55cm) @ F2
6) close focus (about 55cm) @ F2.8
7) close focus (about 55cm) @ F4
8) close focus (about 55cm) @ F5.6
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07-16-2016, 01:25 PM   #22
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Are you sure you have the element back in the proper order? I looks really out of focus
07-17-2016, 05:10 PM   #23
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Here's the optical diagram if you need to double check orientations:



Note, the rear cemented doublet is prone to separation, so you might want to check closely for that while it is apart.

QuoteOriginally posted by niceshot Quote
Are you sure you have the element back in the proper order? I looks really out of focus


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