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Author Topic: ISCO Ultra Anamorphic MC 2X Question Mitchell Dvoskin Phenomenal Film Handler Posts: 1869 From: West Milford, NJ, USA Registered: Jan 2001 posted 03-11-2016 11:35 AM                     I know this is a stupid question even as I type it, but I have not adjusted an ISCO scope lens in a few decades. How do you unlock it so that you can adjust the distance/astigmatism. My vague memory is that you turn the outer ring, but on the lens I need to adjust, the outer ring does not move (or is frozen). Before I take my huge monster pliers and force it to turn, I want to verify that this is what I really want to do.  |  IP: Logged Tim Asten Film Handler Posts: 98 From: Brighton, United Kingdom Registered: Nov 2006 posted 03-11-2016 01:32 PM                     Is that the one where you pull the outer ring out to turn it then push it back in to lock it?  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 03-11-2016 03:21 PM                     Actually I think you must loosen a set screw on the side. Maybe two of them but it's been a while.  |  IP: Logged Steve McAndrew Film Handler Posts: 95 From: North Yorkshire, UK Registered: May 2015 posted 03-11-2016 03:28 PM                     Hi I have one in front of me, on this one it seems that the ring at the very front of the lens locks the main distance setting ring.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 03-11-2016 04:01 PM                     Can't recall if that lens has the ring or the set-screw to lock it. If it has a locking ring: I had an old Bausch & Lomb Cinemascope lenss on which the locking ring was totally frozen up. Someone told me that there was some chemical component in the original grease used on those lenses which, over the years, combined with moisture in the air to corrode the aluminum threads. I got mine free by using an automotive oil-filter wrench (after protecting the circumference of the ring with a felt strip) while carefully heating the ring to expand it slightly using one of those hot-air guns used for shrinking heat-shrink tubing. Worked for me. . .  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 03-11-2016 06:59 PM                     Thinking about it more...I believe the front lock ring has a set screw. Loosen screw and then loosen ring or something like that.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 03-12-2016 12:11 PM                     Looking at a picture of a lens that might be what you have... I think the two knurled rings turn independently - the front one locks the back one (the adjuster). Been a long time for me, too...  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-12-2016 12:44 PM                     This all depends on the era of the lens you have. A picture would be very helpful. Occasionally, so is a hammer... Mark  |  IP: Logged Tim Asten Film Handler Posts: 98 From: Brighton, United Kingdom Registered: Nov 2006 posted 03-12-2016 04:12 PM                     I just remembered, I think we have one of these lenses on our old V8 not used anymore. Here is a pic if it helps. That ring seems to pop off revealing those two screws you see in the slot on the side. Cant remember what they are for now, It's years since we have used it. The outer ring turns although its quite stiff.  |  IP: Logged Mitchell Dvoskin Phenomenal Film Handler Posts: 1869 From: West Milford, NJ, USA Registered: Jan 2001 posted 03-12-2016 04:46 PM                     Thanks everyone for your help. It turns out that there is a tiny lock screw for the outer locking ring. Upon loosening the screw, the outer ring turned freely which unlocked the adjusting ring.  |  IP: Logged Victor Liorentas Jedi Master Film Handler Posts: 800 From: london ontario canada Registered: May 2009 posted 03-12-2016 10:47 PM                     I win!!!!! Sorta Glad you got it. I'm so used to handling the ISCO Ultrastars that I blocked out the older models a bit.  |  IP: Logged

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