Meyer Optik Trioplan 100 2.8 PRAKTINA mount HOW TO CONVERT ?

STELYA · Joined: 29 Aug 2012 Posts: 14

Hi everyone, I have been on this forum for a long time but this is my first thread.

I am photography / bokeh fanatic and collect rare MF lenses.
One of those I bought few days ago . It is Meyer Optik Trioplan 100 2.8 V aluminium version with 15 blade iris.
The problem is that it is in Praktina mount... rare mount different to Praktica or anything else. I would like to know is there an adapter I can buy for Canon EOS digital camera , or if there is not what would you do in my place . Lens itself has 50mm register distance (read that somewhere) and one guy made an adapter from M42 adapter and something but he wont reply my emails. Sad

So far I converted/own Rokkor 58 1.2
Helios 40-2
CZJ Flek 35 2.4

Any help with this Praktina-Eos conversion would be appreciated.
Thanks

STELYA · Joined: 29 Aug 2012 Posts: 14

Mount looks like this

and on this page is not very good explanation (or at least I am dumb ) of how to make an adapter Praktina-eos

http://forum.manualfocus.org//viewtopic.php?id=9596&p=2

mount is held in by three screws and can be cut or replaced

Attila · Expire: 2025-11-18

Sell it collector and buy it with proper mount way to go and not ruin lens.

STELYA · Joined: 29 Aug 2012 Posts: 14

Not an option.
In m42/exa mounts costs 300-1000 dollars . I got mine for 30 euro. Conversion is possible ,just need to know is there an adapter or easier way .

Mos6502 · Joined: 20 Jun 2011 Posts: 960 Location: Austin

I believe there was a praktina to m42 adapter, but good luck finding one these days.

What you might do is look for an extension ring, bellows, or junk Praktina body to steal the mount off of, then you could perhaps epoxy this to an exakta/eos adapter. It would take some precision work and time, but it would be much easier than changing the mount on the lens, and cheaper than finding an m42 version of this lens.

Attila · Expire: 2025-11-18

STELYA · Joined: 29 Aug 2012 Posts: 14

maybe in Hungary

std · Joined: 09 Feb 2010 Posts: 1826 Location: Bulgaria

Where are you located?
I may be able to help if shipping is not an issue.

JohnBar · Joined: 21 Jun 2012 Posts: 581 Location: Liverpool

you can find a junk lens with exakta mount like this

http://www.ebay.de/itm/CARL-ZEISS-TESSAR-2-8-50-mm-FUR-EXAKTA-Schnecke-defekt-/190719569874?pt=DE_Foto_Camcorder_Objektive&hash=item2c67c5afd2

and add a few spacers or washers.....

but as others have said it best to sell and replace

Mos6502 · Joined: 20 Jun 2011 Posts: 960 Location: Austin

An exakta mount wouldn't help any. There'd be no good way to swap the lens mounts out. Plus it would be foolish to do something like that to a lens that has a large collector value vs. user value.

Looking at the link for the guy who made his own praktina adapter, it looks like he made it basically the way I suggested to do it, except that he used screws instead of epoxy.

STELYA · Joined: 29 Aug 2012 Posts: 14

I will try with extension ring and screw it to m42 eos adapter and see what happens,
EOS is 44.5mm I think and Praktina is 50mm so should just extension tube be cut to 5.5 or 6mm or the whole rig with tubes and m42 adapter should be that thick ?

Thanks

luisalegria · Expire: 2018-01-18

The whole rig should be that thick, if I'm reading it correctly.
The problem is to be certain of exactly where the measurement is being taken.
I believe the Praktina mount distance is measured from the "flat" at the base of the lens, but I could be wrong.

There really is no substitute for trials and hand-fitting with this sort of thing. Be prepared to grind off more material if you can't get infinity.

ZoneV · Expire: 2011-12-02

Praktinafan sell this adapter - could be an easy option without harming the lens:
http://praktina.info/Praktina/Praktina-EOS-Adapter.html

STELYA · Joined: 29 Aug 2012 Posts: 14

wow, havent seen that page... thanks
Could someone explain what is the black middle layer in adapter ? cant seem to figure out, I thought there are only two parts in whole rig...

ZoneV · Expire: 2011-12-02

I think this black is from the EF adapter part which is blackend.
It seems that he screws two parts togehter after some machining. The chrome Practina ~ macro M42 or such adapter, and probably a M42 to EF adapter which is normaly full black, but after machining partly "chrome".

Not sure about infinity with this setup.
I use my M42 Trioplan most times most times with near objects with 1 meter distance or less.
Here in Germany Trioplan 100mm/2.8 M42 Ebay prices are ~ 170 Euro at the moment (not collector quality).