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RE Auto Topcor serial number and name ring description
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PostPosted: Sat Apr 30, 2016 12:18 am    Post subject: Cleaning 58/1.4 Reply with quote

You need good mechanical intuition and good tools to clean out an oily diaphragm on the 58/1.4. It's not harder or easier than other RE. Auto-Topcors.

It would be necessary to remove the optical block from the lens, and then unscrew the front and rear sections from the diaphragm assembly. Then you at least have to flood clean that with naphtha, although that may not be enough. You may have to remove the front ring and clean each blade with naphtha by hand.

However, due to the design, if you don't want to have to do it again soon, you would want to split the helical, remove all lube, and then re-lube with proper lube that won't separate into goo and volatile oil. Getting the helical properly reassembled is tricky, many starts to the threads. The design of the 58/1.4 has a much shorter path from the helical to the diaphragm blades than other Topcors.

I'll bet that Eric Hendrickson (http://www.pentaxs.com) would be willing to do it, and would charge a reasonable price. It's not a Pentax, but he's got lots of experience, and there's no real surprises in this lens.


PostPosted: Sat Apr 30, 2016 7:06 pm    Post subject: Reply with quote

Thank you for the informations. I don't think I have the skills to disassemble the whole thing. I will look if I find someone in Germany that could do it for a good price.


PostPosted: Thu Jun 23, 2016 4:19 pm    Post subject: Reply with quote

Well, it's fixed, and it's probably the last serial number known for a silver 1.4...



PostPosted: Mon Jul 11, 2016 2:56 am    Post subject: Reply with quote

35/2.8 (Topcon Code 74B)

Black RE AUTO TOPCOR N 1:2,8 f=35mm TOKYO KOGAKU with SN. 7422057

Click here to see on Ebay


PostPosted: Mon Jul 11, 2016 8:50 am    Post subject: Reply with quote

Billou wrote:
Well, it's fixed, and it's probably the last serial number known for a silver 1.4...



Looks beautiful.
Congratulations.
Possibly not the last known serial.
Here is one that seems to be later.
OH


#1


PostPosted: Tue Jul 12, 2016 4:14 am    Post subject: Reply with quote

Nice. This is indeed the last known serial number for silver 58/1.4 112series with centimetre marking. Does it have a kidney-shape grooving on the back side?

Billou wrote:
Well, it's fixed, and it's probably the last serial number known for a silver 1.4...



Last edited by tao on Tue Jul 12, 2016 4:28 am; edited 1 time in total


PostPosted: Tue Jul 12, 2016 4:19 am    Post subject: Reply with quote

This is the first known copy of silver 58/1.4 112 series with millimetre marking.

Oldhand wrote:


#1


PostPosted: Tue Jul 12, 2016 4:22 am    Post subject: Reply with quote

Nice catch! Thank you Calvin.

calvin83 wrote:
35/2.8 (Topcon Code 74B)

Black RE AUTO TOPCOR N 1:2,8 f=35mm TOKYO KOGAKU with SN. 7422057

Click here to see on Ebay


PostPosted: Tue Jul 12, 2016 4:38 am    Post subject: Reply with quote

tao wrote:
Nice catch! Thank you Calvin.

calvin83 wrote:
35/2.8 (Topcon Code 74B)

Black RE AUTO TOPCOR N 1:2,8 f=35mm TOKYO KOGAKU with SN. 7422057

Click here to see on Ebay

You are welcomed. Do remember this is a Black one. Wink


PostPosted: Tue Jul 12, 2016 4:46 am    Post subject: Reply with quote

Right ho. Fixed that. Thank You Dog

calvin83 wrote:
tao wrote:
Nice catch! Thank you Calvin.

calvin83 wrote:
35/2.8 (Topcon Code 74B)

Black RE AUTO TOPCOR N 1:2,8 f=35mm TOKYO KOGAKU with SN. 7422057

Click here to see on Ebay

You are welcomed. Do remember this is a Black one. Wink


PostPosted: Tue Jul 12, 2016 7:16 am    Post subject: Reply with quote

tao wrote:

25/3.5 (Topcon Code 93B)
V3 [not described by A&R]
RE.Auto-Topcor 1:3.5 f=2.5cm Tokyo Kogaku Japan 933xxx
Black
First known: 933676
Last known: 933885


New aquisition: Black Topcor 25mm (2.5cm), serial no #933852 (V3)







PostPosted: Wed Sep 21, 2016 12:24 pm    Post subject: Reply with quote

Silver RE,Auto-Topcor 1:1,8 f=5,8cm Tokyo Kogaku Japan
s/n 99005302 - Previous last known is 99003686.

Btw what are the differences in optics among 58/1.8 variants mentioned by the OP?


PostPosted: Wed Sep 21, 2016 2:38 pm    Post subject: Reply with quote

This one on eBay at the moment.


PostPosted: Fri Oct 21, 2016 7:27 am    Post subject: Reply with quote

SOLD Topcor 1.8/85mm 13300531 $782 Click here to see on Ebay


PostPosted: Sat Oct 22, 2016 10:39 am    Post subject: Reply with quote

#1


I watched this go recently on the bay, too rich for me at £142, but I believe its the latest serial for any 100mm 2.8, a fair margin later than the last ones in Antonetto. It also has the focus limiter.


PostPosted: Mon Oct 24, 2016 7:57 pm    Post subject: Re: RE Auto Topcor serial number and name ring description Reply with quote

tao wrote:

25/3.5 (Topcon Code 93B)

V3 [not described by A&R]
RE.Auto-Topcor 1:3.5 f=2.5cm Tokyo Kogaku Japan 933xxx
Black
First known: 933676 {Thank you Calvin - http://forum.mflenses.com/viewtopic,p,1422876.html#1422876}
Last known: 933885 {member John Shriver - http://forum.mflenses.com/viewtopic,p,1330167.html#1330167}



I found an earlier SN 933166 on an auction (unfortunately not my own collection....) that appears to open up this range quite a bit, comparatively.




PostPosted: Mon Oct 24, 2016 8:10 pm    Post subject: Re: RE Auto Topcor serial number and name ring description Reply with quote

Warm welccome here!!


paleblue wrote:
tao wrote:

25/3.5 (Topcon Code 93B)

V3 [not described by A&R]
RE.Auto-Topcor 1:3.5 f=2.5cm Tokyo Kogaku Japan 933xxx
Black
First known: 933676 {Thank you Calvin - http://forum.mflenses.com/viewtopic,p,1422876.html#1422876}
Last known: 933885 {member John Shriver - http://forum.mflenses.com/viewtopic,p,1330167.html#1330167}



I found an earlier SN 933166 on an auction (unfortunately not my own collection....) that appears to open up this range quite a bit, comparatively.




PostPosted: Tue Oct 25, 2016 3:14 am    Post subject: Re: RE Auto Topcor serial number and name ring description Reply with quote

Thank you. I have updated the first known for the series.

kds315* wrote:
Warm welccome here!!

paleblue wrote:
tao wrote:

25/3.5 (Topcon Code 93B)

V3 [not described by A&R]
RE.Auto-Topcor 1:3.5 f=2.5cm Tokyo Kogaku Japan 933xxx
Black
First known: 933676 {Thank you Calvin - http://forum.mflenses.com/viewtopic,p,1422876.html#1422876}
Last known: 933885 {member John Shriver - http://forum.mflenses.com/viewtopic,p,1330167.html#1330167}



I found an earlier SN 933166 on an auction (unfortunately not my own collection....) that appears to open up this range quite a bit, comparatively.


PostPosted: Tue Oct 25, 2016 3:18 am    Post subject: Reply with quote

No currently the last know is #7516194.

Macca wrote:
#1


I watched this go recently on the bay, too rich for me at £142, but I believe its the latest serial for any 100mm 2.8, a fair margin later than the last ones in Antonetto. It also has the focus limiter.


PostPosted: Tue Oct 25, 2016 3:28 am    Post subject: Reply with quote

This is a great find. Like Dog I don't know what to make of this. Antonetto & Russo claimed that only 2,000-3,000 were made but here we have a serial number in a 10,000 range. I guest it must be a minor variation.

Mr G wrote:
This one on eBay at the moment.


PostPosted: Tue Oct 25, 2016 3:41 am    Post subject: Reply with quote

Do you have any photos or a reference link?

According to Antonetto & Russo, of the four versions only the 99 & 116 series share the same optics.

y wrote:
Silver RE,Auto-Topcor 1:1,8 f=5,8cm Tokyo Kogaku Japan
s/n 99005302 - Previous last known is 99003686.

Btw what are the differences in optics among 58/1.8 variants mentioned by the OP?


PostPosted: Tue Oct 25, 2016 4:28 pm    Post subject: Reply with quote

tao wrote:
Do you have any photos or a reference link?

A quick crappy cellphone snap of the copy:
https://abload.de/img/img_20161025_18221870bqqrv.jpg


PostPosted: Wed Oct 26, 2016 3:04 pm    Post subject: Reply with quote

Thank you. I have updated the list. Thank you!

y wrote:
tao wrote:
Do you have any photos or a reference link?

A quick crappy cellphone snap of the copy:
https://abload.de/img/img_20161025_18221870bqqrv.jpg


PostPosted: Wed Oct 26, 2016 11:47 pm    Post subject: Reply with quote

I just joined this forum, and it's my first forum experience. So I'll give it a try... I have read a number of entries on mflenses before, and it's been a great source of info on various lenses I've considered picking up.

Tonight I was searching for information on the topcor 2.5cm f3.5 black lens, and I found a serial number listing for this v3 black version in this part of the forum . I was wondering if anyone knows if serial number 933166 is truly the first black version made of roughly 700 total. I would really like to verify this as I just bought this lens with serial number 933166 from an online auction. Are there any topcor experts out there that can verify this for me. I had no idea about the serial number until after I purchased it. I picked it up due to the sample shots and comments for a retro focus ultra wide lens on my a7ii.


PostPosted: Thu Oct 27, 2016 12:11 am    Post subject: Reply with quote

Funny, I looked back a little in this discussion, and I see the very lens I just purchased a couple of entries back.