just received the pentacon 300mm f/4 - in P6 though!

dave_t · Joined: 16 Sep 2008 Posts: 214

I made a small error when ordering this lens online, thinking it was M42 mount, but it turns out that it was Pentacon 6 mount.

I already have the 500mm pentacon, in M42 mount, but I know that this was also a Pentacon 6 lens. The owner of the 500 told me that he simply screws on the M42 end to the lens and it presents no issues,

I'm wondering if I can do this with the 300, or do I need to buy a Psix -> M42 converter. Looking around the internet I've realized that I have absolutely no idea what to type in to get what I'm looking for, all I end up finding is converters, rather than the actual end part of the lens.

any help?

peterqd · Expire: 2014-01-04

Dave, I have the M42 mount for a Pentacon 300 which I bought by mistake as it was advertised as a P6>M42 adapter. If you have the screw ring OK it will convert your lens to M42. You can have it free if you want it. PM me your address.

dave_t · Joined: 16 Sep 2008 Posts: 214

Hi Peter,

There is definitely something at the bottom of the lens that just screws off, but it is just a ring. Would I then just screw the M42 adapter where I took the ring off, or are there any additional steps.

If it turns out that you have what I need, I'd love to take you up on your offer!

peterqd · Expire: 2014-01-04

OK, this lens was manufactured by Pentacon (and previously by Meyer) with interchangeable mounts. I think they did P6, Exakta and M42. This is a pic of the Meyer version with an M42 mount. The interchangeable mount is the cone-shaped piece at the left end and is attached to the lens with the first knurled ring. If you unscrew this ring on your lens you can pull the P6 mount off and use the same ring to fix an alternative mount. What I have is the M42 mount, as in the picture, which I think is the part you need. I don't have the ring, but they are interchangeable. If that will help you you're most welcome to it! Smile

http://m42.artlimited.net/lens_show.php?id=img/lens/64-2.jpg&lid=64

LucisPictor · Expire: 2013-12-03

Another evidence that this probably is the nicest - and surely the most helpful - forum in the net!

dave_t · Joined: 16 Sep 2008 Posts: 214

Thank you for your help Peter. I can remove the ring, but then I'm unable to remove the P6 portion, is there something special that I need to do, or do I just need to use more force? I've also PM'ed you my address.

peterqd · Expire: 2014-01-04

It sounds to me as though you don't have any mount at all, just the ring. Can you see three screwheads with one of them protruding? This screw locates the mount in the right place, so if you can see it you are missing the mount. Can you post a pic?

peterqd · Expire: 2014-01-04

I don't have a 300 Pentacon, but here's a pic of the 200 lens without its mount. I think the 300 is probably similar (although larger)

This is the M42 mount for the 200, with the retaining ring

and here are the M42 mounts for the 300 & 200 lenses side by side. The 500 lens uses the same mount as the 300.

(Apologies for the rubbish pics - it is SO gloomy here again here today and my flash is U/S.)

dave_t · Joined: 16 Sep 2008 Posts: 214

OK, figured it out finally when I got home. The P6 mount was just a little bit stuck, but it came off with no problems. I tried the M42 mount from my 500mm on the 300mm and it worked fine, so now I just need to get another one for the 300mm so that I'm not constantly screwing/unscrewing. I also will now have a spare P6 mount for these lenses if anybody is interested!

I'll post pics of the lens and taken with the lens later this week, too dark now, but it's in better shape than almost any lens I own!

Flor27 · Joined: 13 Sep 2007 Posts: 1195 Location: Paris, France

pwsonline · Joined: 30 Nov 2008 Posts: 36 Location: Netherlands

Hello all,
I have the 500mm 5,6 and the 300mm F4, and I am looking for a Pentacon 6 bayonet fitting for them.

I have 1 M42 adapter for these lenses, and I am willing to trade, or pay for the P-6 mount.

Has anyone something for me?

Attila · Expire: 2025-11-18

Welcome! I don't have it, unfortunately and didn't see yet separately.

pwsonline · Joined: 30 Nov 2008 Posts: 36 Location: Netherlands

Hello Attila,
THank you,
I have the idea there are 2 main groups of lenses: with M42, and with P6.

To make it complicated, I have a Nikon camera, and want to use the Pentacons without M42-adapter with the extra lens, so I need the P6 adapter.
On that one I can fit a P6 to Nikon adapter.
I have this combo too, works great too, on my 500 5,6, but they are stuck together somehow, and, as the fitting rings on the 500 and 300 are different, I can't use it on the 300mm... So I will have to start over again.
My hope is upon someone who bought a Pentacon 3-or 500, with P6, and would like to have a M42...