8mm Forum: Sankor 16D anamorphic lens: Removal of "flange" or "collar"

This is topic Sankor 16D anamorphic lens: Removal of "flange" or "collar" in forum 16mm Forum at 8mm Forum.

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Posted by Robert Lewis (Member # 1458) on January 17, 2010, 01:41 PM:

Apologies for double posting, but the picture appears not to have uploaded.

I have managed to acquire two Sankor 16D anamorphic lenses which are in what can only be described as superb condition. However, one thing is puzzling me.

One of the lenses has what I will describe as a "flange" or "collar" on the end which is mounted nearest to the projector lens. The attached picture shows the two lenses and, in particular, the "flange" to which I refer,

Everything about it suggests that the "flange" or "collar" might unscrew from the barrel of the lens leaving the two lenses identical. It shows no sign of being willing to be "unscrewed" however, and rather than use force with the risk of causing damage, I am wondering if anybody happens to be familiar with the lens and knows whether the "flange" or "collar" is, indeed, removable.

The barrel of the lens without the "flange" is threaded, and I suspect that the "flange" simply screws onto the barrel thread. Any advice would be gratefully received.

The lenses carry exactly the same markings, except for the individual lens numbers. Looking even more carefully at the two lenses, the "flange" or "collar" seems to be in precisely the position one would expect if it had simply been screwed on to the lens to which it is fitted using the thread on the lens. Certainly the lens which does not have the "flange" or "collar" has a thread which is right hand or clockwise. There are no holes in the periphery of the "flange" or "collar" in which some kind of tool might be inserted, and, as I say, I suspect that it is simply screwed onto the normal lens barrel thread. As stated earlier, I haven't tried any significant force such as a strap wrench might deliver simply because I wanted to obtain advice first.

Any advice received with thanks in anticipation.

Posted by John Whittle (Member # 22) on January 17, 2010, 06:16 PM:

Check the ring carefully for some very tiny little set-screws that might be there. Otherwise it should unscrew anti-clockwise. Hold the barrel as close to the ring as possible and not at the end so you don't torque any of the alignment inside the front of the barrel. You could even use those rubber assist wrenches as long as they were both on the same end part of the barrel.

This was probably an adapter added to fit a particular projector or holder.

John

Posted by Robert Lewis (Member # 1458) on January 18, 2010, 06:37 AM:

Thank you John.

I have checked and checked again that there is no evidence of a fixing (set screws, etc.) and so I am going to try using, gently, two strap wrenches. I will use one on the barrel of the lens and one on the "flange" or collar, as you have kindly suggested.

BOB

Posted by Robert Lewis (Member # 1458) on January 18, 2010, 10:28 AM:

Hi John.

Your idea worked splendidly! I used two strap wrenches as you advised - one on the barrel of the lens and the other on the "flange" or "collar", and with just that little more grip than I could achieve with my hands, off it came.

Thank you so much for your advice.

BOB

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