New testing, with one paper shim. Still backfocus but not too bad...
It´s an Industar 61 L/D from 1994 like new
1 meter at f/2.8
1 meter at f/2.8
1 meter at f/4
I will try to add one more shim thinner than this.
As delivered is back-focus. With one shim... it´s difficult for me in my portraits to see if it´s slight back focus or slight front focus... I need to do a new test.
With two shims it´s really front focus.
I know that the best is not to clean them, but how to clean an old lens when we have fingerprints and the glass or the coating is very soft? Summar, Summitar, Jupiters...
I use a cotton swab with some cleaning fluid for lenses, but I do not know if it is the best option.
Brian, I have another black Jupiter created for export in which I will work later. It needs new lubrication because the focus ring is very loose.
In the model of the 50s I followed the instructions I found in pentax-manuals but from this model of the 70s I have not seen anything.
Do you know...
I´ve received my new tools today and it has been very easy to reindex the ring.
Now I will do some definitive tests at different apertures and distances and if everything goes well I would like to secure the screws with nail polish.
What is the best way to apply the nail polish? With the...
I do not worry then if it is like this in those of this age.
When I focus on something far away, it remains in the infinite symbol, but I will try something more distant like an airplane.
I'll do some tests before reindexing the opening ring. But I have some doubts here: Once the screws are...
I will take some pictures in the "real world".
Now I need to reindexed the aperture ring but I have some doubts about the focus ring because at minimum focus the red line is far from the M letter than in other Jupiter I have, and at Infinity does not stop at the right place either.
I do not know how to thank you for so much information.
I have other Jupiter 8 that I use to learn with it and I have seen the retaining ring and set-screw.
It's easier than I thought. But I do not understand this: "Use a sharp piece of metal for a tap for the screw set to hold in place." By...
I am trying to adjust a 1957 Jupiter 8 for Leica. I´ve created several paper shims and after adding one it has improved a lot, but still has backfocus.
Wide open and one meter after adding one shim:
I do the tests with an M7, so I have to wait for the next development ... but I think with...
Two days ago I received a Jupiter 8 from 1975 (export version) that I bought from Brian. He has done a great job. The aperture and focus rings are smooth but with the proper resistance. Clean and clear glass... I love it!
Some pictures with my Leica IIF and Ilford HP5 Plus
My Mom. At f/2.0 and...
I thought the lens was well lubricated, but it had some sticky grease.
Today I´ve removed all the grease and relubricated it. What a difference!
I´ve relube with "Lithium grease for general use". I do not know if it's the best for the helicoid. I´ve read that many recommend white lithium.
Yes BrianS, that was the problem... but today I put the lens on my Leica III and it´s matching perfect at infinity. I don't know what happened yesterday :crying:
Thanks for your comment and MoomMind, thanks for your useful links!
I have a Jupiter 8 from 1957. Is not adjusted for Leica but focus at one meter and wide open is very very close. The problem is the lens don't focus properly at infinity. The distance scale is at infinity, but the camera rangefinder is not.
Any advice? Can I easy fix the lens?
Thanks to all!!
The picture is on heavy overcast and hazy winter day. It may be a few days like this picture and others may be sunny. I think the weather is similar than south England but with mild temperatures, not so cold in winter.