What's the latest lens you added to your collection?

rloewy · Joined: 31 Jul 2023 Posts: 9 Location: United States

Yashica Yashinon-dx 35mm 2.8

Doc Sharptail · Joined: 23 Nov 2020 Posts: 1159 Location: Winnipeg Canada

Doc Sharptail · Joined: 23 Nov 2020 Posts: 1159 Location: Winnipeg Canada

http://forum.mflenses.com/old-tamron-manual-focus-lens-serial-numbers-t84035.html

There's one of them. There's a few more like this around, but hard to find with cleared history. Search function here is a bit on the strange side.

-D.S.

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

Doc Sharptail · Joined: 23 Nov 2020 Posts: 1159 Location: Winnipeg Canada

Finding definitive information on these lenses is not easy, with most of what is available to read being approximations, and at other times out-right guess-work.

There's a couple of guys here that know a bit of their way around these lenses, certainly more than I do.

-D.S.

vanylapep · Joined: 03 Jan 2014 Posts: 312

Pentacon Oreston 50mm/f1.8

kypfer · Joined: 27 Sep 2017 Posts: 523 Location: Jersey C.I.

Received today "bundled" with an EXA 500 that I bought for the included Enna Lithagon 28mm in Sokel fitting (and another Tessar!), was this lens I can find little or nothing about.
Pre-set, with a nice-looking 10-blade aperture and built-in lens hood, if it is T2 mount it's very securely fitted, but not a problem as I've many other 135mm's so I'll not want to be changing the mount on this one Wink

Nelson · Posted: Sat Sep 09, 2023 9:42 am Post subject:

Just received

D1N0 · Joined: 07 Aug 2012 Posts: 2530

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

Early Nikkor-Q Auto 1:4 f=20cm today (left lens; here shown with a later Nikkor-Q Auto 1:4 f=200mm on the right). The Nikkor-Q 1:4 f=20cm has a somehow different optical construction than all the later Nikkor-Q 1:4 f=200mm lenses, as reported by Kouichi Ohshita in his Nikkor Tale No 48 (https://imaging.nikon.com/imaging/information/story/0048/).

For time being I cannot compare the two versions since the early version i just got sadly is defective (focusing goes only to about 15m instaed to infinity, and the entire lens block is wobbly). I'm pretty sure there's no real damag though, and I will keep the lens since it doesn't appear often here in Switzerland.

Richard Haw has extensive repair information for this early version on his excellent website, and therefore repairing should not be a major problem (https://richardhaw.com/2017/01/01/repair-nikkor-q-20cm-f4/)

S

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

Mamiya Sekor E 4/300mm - an extremely rare lens for sure (mine has SN 10067 and therefore seems to be the 67th lens manufactured).

It's the first time I've seen it for sale here in Switzerland, and I was lucky to get it. According to the data published by Mamiya it seems
to have the same optical formula as the earlier (and more common) Sekor CS 4/300mm. Preliminary tests suggest that the
performance indeed is identical. While the Sekor E 4/300mm on 24 MP FF is very sharp (even wide open and in the corners), it has quite
pronounced lateral CAs - but that's a problem with nearly all "non-ED/AD/ULD/Fluorite" 300mm lenses of course!

The Sekor E 4/300mm is one of the several Sekor E lenses I tried to buy just after the collapse of the Mamiya / Osawa / ... empire;
back in 1984. The Swiss representative of Mamiya was selling many of the less common Sekor E lenses for a fraction of their original
price, and being 15 yo their offers were quite tempting. While the E 2.8/28, the EF 1.4/50, and the E 4/200 were still available when I heard
about it, they had sold their last E 4/300 just one day ago. Of course I was deeply disappointed, but alas ... here we go.
After nearly fourty years the lens has arrived, finally ... Wink

At a mere 740 g (measured) the Sekor E 4/300 is probably the lightest of its class (the earlier Sekor CS was 785 g). Compare this to
the Nikkor-H Auto 4.5/300 at 1070g, the Canon nFD 4/300 at 950 g or the Minolta MC-X 4.5/300 at 1180 g ... only the MinÃ¶lta
MD 4.5/300 is comparable: 775 g, but only f4.5 of course.

The biggest disadvantage of the Mamiya Sekor CS and E 4/300mm lenses of course is their MFD: At 5.0 m its MFD is even worse than
the MC-X (4.5m) or the Nikkor-H (4.0m). Of course the MD and the nFD are much better (3.0 m) since they are IF designs.

Here's the Sekor E with its 2.8/135mm and 4/200mm cousins (at the left), plus the two telezooms 3.8/80-200mm and 4/80-200mm:

The latter is a pretty rare lens as well (of course not as rare as the E 4/300mm) - while it looks like a re-badged Tokina 4/80-200 at first, it certainly has a completely different optical construction, and probably is a real Mamiya computation (remember - they had
excellent 4.5/105-210mm tele lenses for their 645 system back then).

BTW I'll publish a few more "lens porn" images of this and other Mamiya lenses/cameras in the "Show your Camera" thread Wink

S

Doc Sharptail · Joined: 23 Nov 2020 Posts: 1159 Location: Winnipeg Canada

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

Doc Sharptail · Joined: 23 Nov 2020 Posts: 1159 Location: Winnipeg Canada

Alun Thomas · Joined: 20 Aug 2018 Posts: 652 Location: New Zealand

(Sellers pic)

I put a last minute bid on this and got it without any competition. There isn't much out there about this lens, but Topcon lenses during this period were all of a quite high standard optically, at least the ones I've checked so far have been. According to this page ( https://lens-db.com/tokyo-kogaku-r-topcor-200mm-f4-1960/ ) it's a sonnar type scheme, with a triple cemented second element (for automatic cool-factor), so hopefully it's an easy job to do any needed cleaning. The lensdb page has it as a 8 blade aperture, but this copy looks to have twelve fairly straight looking blades.

The second lens not shown was a Mamiya Sekor 135/2.8 for exakta mount prismat camera, in slightly disassembled condition. I asked the seller to hold on to it as the lens is getting posted a long distance and I already have a copy.

kiddo · Joined: 29 Jun 2018 Posts: 1221

caspert79 · Joined: 31 Oct 2010 Posts: 3131 Location: The Netherlands

Manichaean · Joined: 03 Oct 2013 Posts: 70

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

marcusBMG · Joined: 07 Dec 2012 Posts: 1312 Location: Conwy N Wales

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

stevemark · Joined: 29 Apr 2011 Posts: 3925 Location: Switzerland

ZuikosHexanonsandVivitars · Joined: 03 Nov 2021 Posts: 249 Location: Austria

Can someone please point me in the right direction?
I just found a Canon nFD 1.4/50 on the ubiquitous online market place in good condition and so cheap that I had to give in.
Now according to the production code on the bayonet itÂ´s from 1986 (reads A422), but what has happened from the introduction of this lens type in 1979 until Canon stopped production - anyone know an online resource having more information on that?

Many thanks in advance!