Enlarging lens with flared end -- how do I attach it?

[cinefane]

I have an enlarger lens that, instead of being threaded, has a flared end. How do I go about attaching this to my enlarger?

 

[Ian Grant]

With difficulty.

It must have fitted a special board or turret that the flange locked into. What lens is it ? Post an image.

Ian

 

[cinefane]

I had to stick it under the scanner as I couldn't find my digital camera.

 

[mwdake]

Are you sure the thing does not come apart?
It looks like the lens might be mounted to a Durst Lens Cone.
If it does not come apart in the middle look down the inside from the rear of the lens and see if there is retaing ring holding the lens to the cone.

 

[Bob Carnie]

This looks like a durst cone as suggested, and the lens should come away from the adaptor which is the ring that is inserted into a flange with a screw thread to hold onto the enlager.

Are you sure the thing does not come apart?
It looks like the lens might be mounted to a Durst Lens Cone.
If it does not come apart in the middle look down the inside from the rear of the lens and see if there is retaing ring holding the lens to the cone.

 

[Rick A]

It certainly does seperate from the mounting cone. It may be that all you need to do is apply a SMALL amount of penetrating oil, and carefully unscrew the lens. Be extra careful not to get too much oil on the lens, then clean up afterward. A strap wrench could be beneficial here.
Good luck
Rick

 

[Ian Grant]

I've had quite a few Durst selected Componon's and sometimes there's a small grub screw holding the mount to the lens. Often the lenses were factory fitted to the flange or adaptor and where usually supplied fitted to roll head printers turrets etc

My Componon S 150mm is similar but in a long screw thread mount, I assumed it was like yours but once I loosened the screw it came apart easily. Don't try a wrench etc as if there is a screw and it's not released you'll damage the mounting threads, and only try penetrating oil as a very last resort.

The Dust select lenses are similar to the Linhof & Sinar select Schneider camera lenses and were optically tested before being accepted and badged by Durst, it's an excellent lens.

Someone will buy the mount if you dont need it.

Ian

 

[cinefane]

There's a hole but -- as far as I can see -- no screw. Tried unscrewing the mount by hand -- won't budge. Will investigate later.

 

[Ian Grant]

There's a hole but -- as far as I can see -- no screw. Tried unscrewing the mount by hand -- won't budge. Will investigate later.

That's as it should be, there is supposed to be a small grub screw it's quite deep inside, unscrew that and the two parts undo.

Ian

 

[cinefane]

Looks like it's suffered at the hands of a previous owner. I got a good look at the grub in direct sunlight. Its head has been worn away. Short of drilling the grub out, I'm stuck.

 

[resummerfield]

Looks like it's suffered at the hands of a previous owner. I got a good look at the grub in direct sunlight. Its head has been worn away. Short of drilling the grub out, I'm stuck.

If you have, or get, a small left-hand drill bit, the job may be easier than you think. The left-hand bit will tend to unscrew the grub screw enough for you to unscrew the adapter.

 

[Sirius Glass]

If you have, or get, a small left-hand drill bit, the job may be easier than you think. The left-hand bit will tend to unscrew the grub screw enough for you to unscrew the adapter.

Use an easy-out. It has a conical head with left hand threads.

Steve

 

[paul_c5x4]

Use an easy-out. It has a conical head with left hand threads.

No ! Please, please do not use easy-outs for they are the spawn of Satan - When you break one, you have to pay an exorbitant amount to get someone to spark erode the remains out - I've wasted more than enough time dealing with the aftermath of these damned things.

Most likely it is no more than an M3 screw, so carefully drill the whole thing out.

 

[Sirius Glass]

No ! Please, please do not use easy-outs for they are the spawn of Satan - When you break one, you have to pay an exorbitant amount to get someone to spark erode the remains out - I've wasted more than enough time dealing with the aftermath of these damned things.

Then I do not want you around when I work on one of my cars or my motorcycle!

 

[Dennis S]

With an easy-out that small you really don't stand a chance of getting it out. Just take it to a machine shop or your nearest mechanics shop. I am sure they can help out out better than doing it yourself. I know because I was a Machinist in my working days. You may f**/ it up REAL good. Leave the delicate work to the proffesionals.

 

[pschauss]

No ! Please, please do not use easy-outs

Agreed. I learned that the hard way trying to remove a broken exhaust manifold stud on my MG. Now whenever I find something like that that I cannot remove I take it straight to the machine shop.

 

[mwdake]

I learned that the hard way trying to remove a broken exhaust manifold stud on my MG.

Been there done that a few times and once that large muffler place did it for me but left me with a manifold with only 2 out of 6 studs.