NikonGear'23
Gear Talk => What the Nerds Do => Topic started by: richardHaw on March 18, 2018, 02:07:25
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http://richardhaw.com/2018/03/18/repair-nikkor-h-c-5cm-f-2-ltm/
don't know how many people here are interested in LTM lenses :o :o :o
i imagine that there aren't many ::)
from my site's statistics, i can see that my rangefinder articles are viewed the least but i really have to include these.
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I think LTM is nice after getting a Nikon Z body.....
Easy to adapt.....and now I by accident won one of these lenses on ebay (chrome version).....and must admit the one with black aperture ring looks better.
I learned that a 6-element lens can be a Sonnar type......and not the usual Gauss type in the 50/2 H-C for SLR.
Some like the bokeh of Sonnars over Gauss types but I don't know if this is a general accepted statement.....
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LTM lenses are all right, but being more rare tend to command higher asking prices .... most Nikon RF lenses can easily be mounted via a RF(S)-Z adapter.
As to the "normals" in LTM livery they are more adaptible than their RF(S) counterparts as the latter are devoid focusing helicoids.
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Rangefinder lenses in general are very compact on a Nikon-Z body. They look good on a Z-body. The Z-body itself has a classic look.
The Nikkor 5cm f2 rangefinder lens seems to be one of the most "price friendly" even in LTM it seems.
The 3.5cm/1.8 is a bit more pricy......and also the 5cm/1.1....
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the LTM versions have gotten cheaper these days :o :o :o
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I have a fairly comprehensive line of the RF Nikkors ... too many lenses in the cupboards already ... will nevertheless pick up your hint, Rick. The tiny Z50 looks great with a classic RF Nikkor on it.
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The 50/1.1 in LTM will look impressive on a Z50 :-)
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don't know how many people here are interested in LTM lenses :o :o :o
More than you would imagine ! ;D
The fever for these tiny lenses started with Sony mirrorless cameras. With Z system, the fever becomes epidemic.
Japan is a gold mine of these LTM lenses which are very common there, (mostly Canon 50mm f/1.8, Nikon rangefinder are rarer and even more expensive than L39 Leitz/leica.
Even tired, hazed and full of fungus, these lenses are proposed on the second hand market, and they sell ! :o
I've got this fever... ::)
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I as well own several Japanes LTM lenses, so I like your input very much
my 50mm Nikon is the 1.4 LTM sonnar, the 2.0 is on my list, but I have so many 50mm lenses that there is no hurry
another very fine Japanese 50mm lens is the 1.8 Chiyoda Kogaku Super Rokkor
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It was by search I found Richards article which is from 2018......and at that time with no Z-cameras?.....the interest seems not very high......but this has changed....
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one big bonus for these LTM nikkors is the 50mms focus closer :o :o :o
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one big bonus for these LTM nikkors is the 50mms focus closer :o :o :o
This is a big bonus indeed, Richard !
Most of 50mm LTM focuse around 1 meter.
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Which rubber cup tool did you use to unscrew/fasten the name ring on this lens?
I have one where the front lens element is loose and I guess it is the name ring that hold the front element in place with just pressure?
I have several rubber cups but none that just fits.....also have rubber conical "rings".....but none has the right diameter....
http://richardhaw.com/2018/03/18/repair-nikkor-h-c-5cm-f-2-ltm/
don't know how many people here are interested in LTM lenses :o :o :o
i imagine that there aren't many ::)
from my site's statistics, i can see that my rangefinder articles are viewed the least but i really have to include these.
-
i have several so it was not a problem :o :o :o look for some used for walking canes
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I ended up ordering a rubber-set tool like this:
https://www.ebay.com/itm/283919571845
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please tell me how well it works when you get it. :o :o :o
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Yes, I will do......it usually take some weeks from China......
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I have got the rubber tool set and I think it is quite nice.
Compared to my two other sets of rubber tools the grip is about the same but maybe the grip could be better.
I will try to de-grease it and see if grip becomes better. With grip I mean "friction" so a lot of torque can be applied.
The nice thing is that the tool has a curved profile so it will not interfere with a curved lens element.
I think I need experience with how much friction the best rubber tools has to really compare the quality of the tool.
For the price I think it is good.
I found out that my 5cm LTM is different from the lens in this thread. Maybe because it is an older version?
The ring with serial no. etc. seems to be one piece of metal (the label-ring is not separate). And I think the front element is glued (or was glued.....my version has a loose element and rattles when I shake the lens).
I think I can press the element backwards out of the front part. I will later make a few images of the disassembled front part of the lens.
Lens was advertised as near mint but it has a few scratches in front element and filter ring is not mint either and also a L39 filter was missing. There was no images of the front part so after I complained I got a full refund and I could keep the lens. So I have a free lens to play with.
How do I find out if the front element was original glued into place? .....and which glue is normally used for such purpose? :-)
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I have here the front assembly of the lens where front element should be secured.
Front element seems to be inserted from the back and my guess is that it was secured by glue?
It is loose now. There are some rather thin aluminium foil at the back. Is that a sign that front lens element was glued into place?
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I have never seen a Nikkor with lens elements glued into the lens housing nor glued into the element retaining rings.
Looks like a faulty lens or wrongly repair attempt.
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So it should be kept into place just with pressure by the part it is attached to?
It looks a bit strange with that aluminium foil. Maybe a thin shim is missing in order to apply the pressure when the front lens part is screwed into the front lens assembly in picture.....
Apart from front lens and filter ring the rest of lens is in nice condition so could be a good repair part......maybe.....or it will be trashed......we will see :-)