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01-13-2010, 07:41 PM   #1
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Opinions on Asahi Auto-Takumar 50mm/1.2

I have this possible deal to buy an old Asahi Auto-Takumar 50/1.2 lens but I am not sure at all this would be adaptable to a K20D/K7.
Here are two pics of the lens, still attached to an old Pentax film camera:

If anyone has any idea about this, please let me know what that is exactly.

JP


Last edited by jpzk; 08-30-2015 at 06:47 PM.
01-13-2010, 08:23 PM   #2
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Typos here. The lens is 1:2/55 (55mm f/2) not 1.2/50 (50mm f/1.2). The Auto-Takumar is a manual focus/manual aperture lens; need to use stop down metering on modern Pentax dslr. The lens is screwmount; a k-mount adapter is required to use it on K body. The lens has excellent IQ, however, without lens coatings some care is needed to prevent flare & ghosting.

Last edited by rhodopsin; 01-13-2010 at 08:54 PM.
01-13-2010, 08:39 PM   #3
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It's a 55 1:2.0, not a 50 1:1.2......
01-13-2010, 09:34 PM   #4
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JP, it's a 1:2.

basing from the condition of the lens, I would buy it for 10 bucks. if it's clean and glittering, maybe 40-50 bucks.

01-13-2010, 09:53 PM   #5
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QuoteOriginally posted by Pentaxor Quote
JP, it's a 1:2.

basing from the condition of the lens, I would buy it for 10 bucks. if it's clean and glittering, maybe 40-50 bucks.
You're too cheap. Just the super-cool cocking mechanism is hours of fun. And look at all the aperture blades - ten? It's worth quite a bit just to be the right lens for a particular camera. I think the photo of the front is mostly showing a dusty filter. With the right golden/purple reflection off the glass, you would be raising your bid.
01-13-2010, 10:10 PM   #6
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QuoteOriginally posted by rhodopsin Quote
Typos here. The lens is 1:2/55 (55mm f/2) not 1.2/50 (50mm f/1.2). The Auto-Takumar is a manual focus/manual aperture lens; need to use stop down metering on modern Pentax dslr. The lens is screwmount; a k-mount adapter is required to use it on K body. The lens has excellent IQ, however, without lens coatings some care is needed to prevent flare & ghosting.
The aperture isn't manual. its actually semi-automatic hence the name Auto Takumar. They are cocked with the lever for each photo. This started with the K and evolved into the Super Tak. There is actually an Auto Tak that is actually a Super Tak with the automatic aperture. It is identifiable by the fact it as the A-M switch like the Super Taks have rather than a cocking lever.


Edit: BTW, that is an Asahi H2 body in the pic!
01-13-2010, 10:46 PM   #7
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QuoteOriginally posted by Just1MoreDave Quote
You're too cheap. Just the super-cool cocking mechanism is hours of fun. And look at all the aperture blades - ten? It's worth quite a bit just to be the right lens for a particular camera. I think the photo of the front is mostly showing a dusty filter. With the right golden/purple reflection off the glass, you would be raising your bid.
if someone offers it to you for $10 bucks, are you not going to purchase it because it's being sold cheap?
01-13-2010, 11:07 PM   #8
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QuoteOriginally posted by Pentaxor Quote
if someone offers it to you for $10 bucks, are you not going to purchase it because it's being sold cheap?
I would try really hard not to, because I just got the other kind of Auto-Takumar 55mm f1.8 that Blue referred to, without the semi-auto cocking lever. And I have the SMC Takumar 55/2, the K55/1.8, Auto Rikenon 55/1.4, Mamiya 55/1.4, Cosina 55/1.2, a Vivitar 55/2.8 macro and a CZJ Biotar 58/2. I have owned and sold three varieties of Super-Takumar 55/1.8, a Super-Takumar 55/2, the Super-Multi-Coated and SMC Takumar 55/1.8 and a K55/2. I kind of like 55mm.

I don't think I could resist all those aperture blades. The lenses above all have six blades. I'd probably pay $50 without even knowing how the semi-auto feature works on DSLRs.

01-13-2010, 11:14 PM   #9
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QuoteOriginally posted by Blue Quote
The aperture isn't manual. its actually semi-automatic hence the name Auto Takumar. They are cocked with the lever for each photo. This started with the K and evolved into the Super Tak. There is actually an Auto Tak that is actually a Super Tak with the automatic aperture. It is identifiable by the fact it as the A-M switch like the Super Taks have rather than a cocking lever.


Edit: BTW, that is an Asahi H2 body in the pic!
OP has K20D/K7, this lens is manual aperture on that camera.

I'm not disagreeing with you; I know what you are saying. Pentax used the term Auto Diaphram in that era; now they use Auto Aperture to describe electronic lens.
01-13-2010, 11:23 PM   #10
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QuoteOriginally posted by rhodopsin Quote
OP has K20D/K7, this lens is manual aperture on that camera.

I'm not disagreeing with you; I know what you are saying. Pentax used the term Auto Diaphram in that era; now they use Auto Aperture to describe electronic lens.
I believe JP knows what he's doing. regardless what it does or what Auto means, he would be happy to use set it manually or automatically. setting the aperture is not a difficult thing to do.
01-13-2010, 11:29 PM   #11
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QuoteOriginally posted by Just1MoreDave Quote
I would try really hard not to, because I just got the other kind of Auto-Takumar 55mm f1.8 that Blue referred to, without the semi-auto cocking lever. And I have the SMC Takumar 55/2, the K55/1.8, Auto Rikenon 55/1.4, Mamiya 55/1.4, Cosina 55/1.2, a Vivitar 55/2.8 macro and a CZJ Biotar 58/2. I have owned and sold three varieties of Super-Takumar 55/1.8, a Super-Takumar 55/2, the Super-Multi-Coated and SMC Takumar 55/1.8 and a K55/2. I kind of like 55mm.

I don't think I could resist all those aperture blades. The lenses above all have six blades. I'd probably pay $50 without even knowing how the semi-auto feature works on DSLRs.

probably we should call you DAVE 55 from now on. anyways, usually with those kinds of of items being sold with dusts on them, you can get them for a real bargain or find them in a garage sale selling for 10 bucks for the whole thing. I do believe that an owner who is much up to what is going on nowadays and keeps his lens in very good condition, knows how much his lenses value are even in today's standards.

all we need is to look for a granpa seller.
01-14-2010, 08:16 AM   #12
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Ooops! I certainly goofed again: that is a 55/2 and not a 50/1.2.
However, no matter if this is manual/semi-auto or whatever, if it does fit on the K7 and/or K20D, I woulnd't mind having it.
Would be interesting to find out what sort of results one can get with this.
I appreciate the comments and opinions, and especially the friendly reminder that this is not a f1.2 lens.
Cheers to all, and I will report back to this thread if I ever decide to buy it.

JP
01-14-2010, 08:33 AM   #13
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QuoteOriginally posted by jpzk Quote
Would be interesting to find out what sort of results one can get with this.
JP, You might consider searching for "auto takumar 55 2" on Flickr; there are many nice results there (although that search catches some non-55/2 shots, too). Forum member Mike Cash has some particularly nice photos with this lens.

Last edited by indytax; 01-14-2010 at 08:41 AM.
01-14-2010, 08:33 AM   #14
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QuoteOriginally posted by rhodopsin Quote
OP has K20D/K7, this lens is manual aperture on that camera.

I'm not disagreeing with you; I know what you are saying. Pentax used the term Auto Diaphram in that era; now they use Auto Aperture to describe electronic lens.
Regardless of how the K200d, K20d, K7, K10d, K-x etc work, it is still not a manual diaphragm. For collectors and users of m42 gear, correct terminology does matter especially given the fact that it is on a Pentax Asahi H2 body. This holds true whether you are talking about the m42 lenses, k or M lenses.

Edit: Some of the Auto-Taks are amazingly small compared even to their Super Tak siblings. Look at the K200d camera mount.


Auto-Tak 35mm f3.5 on K200d


Super Tak 35mm f3.5

Last edited by Blue; 01-14-2010 at 08:40 AM.
01-14-2010, 08:35 AM   #15
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the ideal 50mm and there are many varients are the F1.4. they come in Takumar, auto takumar, super takumar and SMC takumar varients at least.
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