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Mamiya/Sekor 55mm F1.2 wide open samples
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PostPosted: Mon Mar 25, 2013 2:29 pm    Post subject: Mamiya/Sekor 55mm F1.2 wide open samples Reply with quote
This lens has a M42 mount and yes the largest aperture is F1.2, not the 55mm F1.4 or 55/1.8 as is commonly encountered.
I think this lens quite rare, did not find any info on the net about this lens so I was curious and decided to buy it.

just got this lens, and took some sample pictures with my nikon D60.
since I used a regular M42-nikon adapter so infinity focus can't be obtained

all pictures are straight out of camera JPEGs, just resize.











PostPosted: Mon Mar 25, 2013 4:00 pm    Post subject: Reply with quote
Nice - looks reasonably sharp to me. What is your maximum focus distance? - actually infinity focus is less important on a specialist lens like this where you are usually isolating a subject from a background.


PostPosted: Mon Mar 25, 2013 4:45 pm    Post subject: Reply with quote
Basilisk wrote:
Nice - looks reasonably sharp to me. What is your maximum focus distance? - actually infinity focus is less important on a specialist lens like this where you are usually isolating a subject from a background.


thanks basilisk, a bit soft but acceptable wide open performance.
I dont see the distance scale on the lens, so I do not know exactly but I think approximately 2-3 meters.
I agree with you, I have some other M42 lenses such as pancolar80 and takumar85, because I liked the half-body portrait so infinity focus less important for these lenses.


PostPosted: Mon Mar 25, 2013 6:17 pm    Post subject: Re: Mamiya/Sekor 55mm F1.2 wide open samples Reply with quote
kopi234 wrote:
This lens has a M42 mount and yes the largest aperture is F1.2, not the 55mm F1.4 or 55/1.8 as is commonly encountered.

Can you post some pictures of the lens itself? Front, rear, side.


PostPosted: Mon Mar 25, 2013 7:13 pm    Post subject: Re: Mamiya/Sekor 55mm F1.2 wide open samples Reply with quote
dimitrygo wrote:
kopi234 wrote:
This lens has a M42 mount and yes the largest aperture is F1.2, not the 55mm F1.4 or 55/1.8 as is commonly encountered.

Can you post some pictures of the lens itself? Front, rear, side.


here dimitryo, pictures of the lens.











the optical slightly yellowish, has 6 diaphragm blades.


PostPosted: Mon Mar 25, 2013 8:18 pm    Post subject: Reply with quote
Very, very interesting!


PostPosted: Mon Mar 25, 2013 8:31 pm    Post subject: Reply with quote
Yes, really very interesting. Looks different than Tomioka lenses.
What is it's minimal focusing distance?


PostPosted: Mon Mar 25, 2013 8:43 pm    Post subject: Reply with quote
casualcollector wrote:
Very, very interesting!

indeed Smile

dimitrygo wrote:
Yes, really very interesting. Looks different than Tomioka lenses.
What is it's minimal focusing distance?


i dont know about Lens construction, yes different design with the Tomioka lenses but the same yellowish maybe contains thorium glass.
the MFD listed 0.5m /1.5 feet.


PostPosted: Mon Mar 25, 2013 9:04 pm    Post subject: Reply with quote
The ambar reflection is great. Seems similar to the yashinon ones.

Nice kens. COngrats.


PostPosted: Tue Mar 26, 2013 4:03 am    Post subject: Reply with quote
Very interesting. Obviously not a Tomioka product, and obviously even less common than one of those. I like how they went with a flat "pin" instead of cutting a section out of the rear element to have room for a round pin and provide space for the aperture plunger.


PostPosted: Tue Mar 26, 2013 5:40 am    Post subject: Reply with quote
Mine is 48mm f/1.9. Just got from 'rombengan' Om !


PostPosted: Tue Mar 26, 2013 8:28 am    Post subject: Reply with quote
The first I've heard of this lens, cool find.


PostPosted: Tue Mar 26, 2013 10:48 am    Post subject: Reply with quote
DR.JUAN wrote:
The ambar reflection is great. Seems similar to the yashinon ones.

Nice kens. COngrats.


thanks dr.juan Smile


Mos6502 wrote:
Very interesting. Obviously not a Tomioka product, and obviously even less common than one of those. I like how they went with a flat "pin" instead of cutting a section out of the rear element to have room for a round pin and provide space for the aperture plunger.


you're right, I was thinking the same, viewed from the rear element this is not tomioka typically.


bang2 wrote:
Mine is 48mm f/1.9. Just got from 'rombengan' Om !


di tempat saya yang ada rombengan kain om Laughing ,
ngga kaya di kota-kota besar p. jawa rombengannya lensa. Laughing



Lightshow wrote:
The first I've heard of this lens, cool find.


thanks Smile


PostPosted: Thu Mar 28, 2013 12:19 am    Post subject: Reply with quote
What a find !
Never heard about this one !
Bravo


PostPosted: Thu Mar 28, 2013 1:06 am    Post subject: Reply with quote
never saw this one either, i do have the 55 1.4 (much more common for sure).


PostPosted: Thu Mar 28, 2013 8:17 am    Post subject: Reply with quote
Phenix jc wrote:
What a find !
Never heard about this one !
Bravo


thanks phenix,
I also never heard before.
unfortunately very limited use of the M42 lenses on my nikon camera.
I will be saving money, to be able to buy a mirrorless camera in order to maximize its use.


clockwork247 wrote:
never saw this one either, i do have the 55 1.4 (much more common for sure).


neither do I, and even the 55/1.4 rarely at my country.


PostPosted: Thu Mar 28, 2013 12:28 pm    Post subject: Reply with quote
kopi234 wrote:
and even the 55/1.4 rarely at my country.


If that is so, the likelihood of you finding this lens in Indonesia (Djakarta?) would seem against impossible odds. I find the serial number most interesting. Possibly the first of a very small group of lenses made for internal evaluation at Mamiya. Perhaps ten or fewer?


PostPosted: Thu Mar 28, 2013 3:08 pm    Post subject: Reply with quote
casualcollector wrote:
kopi234 wrote:
and even the 55/1.4 rarely at my country.


If that is so, the likelihood of you finding this lens in Indonesia (Djakarta?) would seem against impossible odds. I find the serial number most interesting. Possibly the first of a very small group of lenses made for internal evaluation at Mamiya. Perhaps ten or fewer?


I saw this lens at an online auction japan, then I buy it through a friend who is in Japan.
Im googling but didn't find anything about this lens, so about the serial number,maybe you're right.
the serial number shows No. 41001 , This could be the first of a very small group of lenses made for internal evaluation and never in mass production. a prototype? i dont know.
in fact, I have never seen nor heard anything of this lens. even after I looked it up on the internet.


PostPosted: Thu Mar 28, 2013 10:49 pm    Post subject: Reply with quote
I have an original mamiya/sekor interchangeable lens chart from the 60`s and that is definitely not on it.

It lists the following 28 2.8, 35 2.8,55 1.4, 55 1.8, 50 2, 60 2.8 macro, 135 2.8, 135 3.5, 200 3.5, 200 4.5, 400 6.3, including lens construction.

Congratulations on a nice and very rare find, a non production lens.
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