Chinon Auto 50mm f1.4

DocComPhoto · 01-06-2022, 11:54 AM - **2 Likes**

I tried to post this review on that page but as a new member I have to post one here first. That is fine. I have two of these lenses, which appear identical, but to my total shock one has six blades and the other has eight blades! The review of this lens, which I believe was made by Tomioka, shows a photo with six blades. I have both versions, side by side and they only vary by about 40,000 in serial number. Mine with serial number C639xxx is six blades, and C674xxx is eight! Other than that they are identical. Needless to say, the 8 blade version should give a softer bokeh.

I have about 15 of the 50mm f1.4, Nikon, Yashica, Pentax, Canon, Tomioka, Minolta, and these. I must say, the Chinon 50mm f1.4 give the best color, beating all others so far.

Raymond Oelrich

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**.a.t.** · 01-06-2022, 12:48 PM

Welcome, Raymond!
Beautiful colors indeed! And I share your fascination with fast 50s.

That's an interesting discovery about the 6 vs 8 iris blades. My Auto Sears MC 50mm f/1.4 #C675617 is a rebadged Chinon with 8 blades. And I see in the lens review database, the pictured Chinon 50mm f/1.4 appears to have 6 blades.
Chinon 50mm f1.4 Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

As mentioned, if you add your information there it would be appreciated.

**Kerrowdown** · 01-06-2022, 02:31 PM

Welcome to the forum from the Highlands of Scotland.

I only have eyes for my "Special Lady" Pentax-A 50mm F1.2

DocComPhoto · 01-06-2022, 07:26 PM

Originally posted by .a.t.

Welcome, Raymond!
Beautiful colors indeed! And I share your fascination with fast 50s.

That's an interesting discovery about the 6 vs 8 iris blades. My Auto Sears MC 50mm f/1.4 #C675617 is a rebadged Chinon with 8 blades. And I see in the lens review database, the pictured Chinon 50mm f/1.4 appears to have 6 blades.
Chinon 50mm f1.4 Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

As mentioned, if you add your information there it would be appreciated.

That is a great lens too! A Tomioka-made lens as well. At one time Tomioka tried to void the Sears contract because their manufacturing costs exceeded revenue from Sears but they had to fulfill the agreement. Great lenses.

**.a.t.** · 01-06-2022, 10:30 PM

Originally posted by DocComPhoto

That is a great lens too! A Tomioka-made lens as well. At one time Tomioka tried to void the Sears contract because their manufacturing costs exceeded revenue from Sears but they had to fulfill the agreement. Great lenses.

DocCom, that's really interesting to hear about Sears and Tomioka. Can you give me more details about that situation, please?

**.a.t.** · 01-14-2022, 09:39 AM

@DocComPhoto,

If you have a chance, I'd enjoy hearing anything you know about the Sears and Tomioka relationship.

DocComPhoto · 01-15-2022, 08:50 AM

Originally posted by .a.t.

DocCom, that's really interesting to hear about Sears and Tomioka. Can you give me more details about that situation, please?

All I know is what is online, you will have to search it there, sorry.

Raymond

**.a.t.** · 01-15-2022, 07:07 PM

Originally posted by DocComPhoto

All I know is what is online, you will have to search it there, sorry.

Raymond

Will do. Thanks for the reply.

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01-06-2022, 12:48 PM	#2
.a.t. Site Supporter Join Date: Mar 2011 Location: yesterday Photos: Gallery Posts: 1,261	Welcome, Raymond! Beautiful colors indeed! And I share your fascination with fast 50s. That's an interesting discovery about the 6 vs 8 iris blades. My Auto Sears MC 50mm f/1.4 #C675617 is a rebadged Chinon with 8 blades. And I see in the lens review database, the pictured Chinon 50mm f/1.4 appears to have 6 blades. Chinon 50mm f1.4 Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database As mentioned, if you add your information there it would be appreciated.

01-06-2022, 02:31 PM	#3
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,835	Welcome to the forum from the Highlands of Scotland. I only have eyes for my "Special Lady" Pentax-A 50mm F1.2

01-06-2022, 07:26 PM	#4
DocComPhoto New Member Join Date: Mar 2021 Posts: 3 Original Poster	Originally posted by .a.t. Welcome, Raymond! Beautiful colors indeed! And I share your fascination with fast 50s. That's an interesting discovery about the 6 vs 8 iris blades. My Auto Sears MC 50mm f/1.4 #C675617 is a rebadged Chinon with 8 blades. And I see in the lens review database, the pictured Chinon 50mm f/1.4 appears to have 6 blades. Chinon 50mm f1.4 Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database As mentioned, if you add your information there it would be appreciated. That is a great lens too! A Tomioka-made lens as well. At one time Tomioka tried to void the Sears contract because their manufacturing costs exceeded revenue from Sears but they had to fulfill the agreement. Great lenses.

01-06-2022, 10:30 PM	#5
.a.t. Site Supporter Join Date: Mar 2011 Location: yesterday Photos: Gallery Posts: 1,261	Originally posted by DocComPhoto That is a great lens too! A Tomioka-made lens as well. At one time Tomioka tried to void the Sears contract because their manufacturing costs exceeded revenue from Sears but they had to fulfill the agreement. Great lenses. DocCom, that's really interesting to hear about Sears and Tomioka. Can you give me more details about that situation, please?

01-14-2022, 09:39 AM	#6
.a.t. Site Supporter Join Date: Mar 2011 Location: yesterday Photos: Gallery Posts: 1,261	@DocComPhoto, If you have a chance, I'd enjoy hearing anything you know about the Sears and Tomioka relationship.

01-15-2022, 08:50 AM	#7
DocComPhoto New Member Join Date: Mar 2021 Posts: 3 Original Poster	Originally posted by .a.t. DocCom, that's really interesting to hear about Sears and Tomioka. Can you give me more details about that situation, please? All I know is what is online, you will have to search it there, sorry. Raymond

01-15-2022, 07:07 PM	#8
.a.t. Site Supporter Join Date: Mar 2011 Location: yesterday Photos: Gallery Posts: 1,261	Originally posted by DocComPhoto All I know is what is online, you will have to search it there, sorry. Raymond Will do. Thanks for the reply.