my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Anamorphic attachment focus problem

Author Topic: Anamorphic attachment focus problem Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 07-03-2005 06:37 PM                     Okey, now I need a little help from the pros here: I'm experiencing focus problems with some of my Schneider attachments - and these are of the older "Kreutznach" attachments, not the smaller newer ones. Granted, I've done the horizontal/vertical focus adjustments as so quoted in the tip section with RP-40 with some lenses focusing in extremely well, where others are still a bit fuzzy. Even, one attachment is so fuzzy to where I had to borrow another attachment (an old B&H attachment I) from a friend to get a better focused picture. The fuzzy ones to where I've traded out the backups (same focal length) and the problem stayed with the attachment (figuring that the backups had burnt or distorted elements..) Granted, it seems like this problem leans toward the attachments than the backups, but just wondering if there is something missing that I need to do. thx-Monte  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 07-03-2005 11:16 PM                     You can 1) throw them away because they will never be very good or more likely 2) send them back to Schneider so that the lens elements can be set up on an optical bench. This genearation of Schneider anamorphics were known to allow their lens elements to come out of alignment (rotationally). Until they are in perfect alignment, you will NEVER get a satisfactory focus.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 07-04-2005 09:39 AM                        You may know that Schneider bought Century Optics on the Left Coast. Excellent guy there (repairs administration) is John Siorgingus...I think spelling is close. I have had really good luck with the work he has supervised, esp. on anamorphics. Louis  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-04-2005 09:48 AM                     Now if you had quality Kowas or Sankors this wouldn't have happened they would have looked like this from the start and stayed like that  |  IP: Logged Adam Martin I'm not even gonna point out the irony. Posts: 3686 From: Dallas, TX Registered: Nov 2000 posted 07-04-2005 10:04 AM                     quote: Gordon McLeod they would have looked like this from the start and stayed like that They would have been un-focusable from the start? Fantastic!  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 07-04-2005 03:45 PM                     quote: Steve Guttag "...their lens elements to come out of alignment (rotationally)." Thx for your help on this, Steve. Now a deductive question comes to being, and I may have already answered it below: Interesting on this above statement. Now, it starting to come to light on how this occurs with elements rotating within the barrel. Here's the scenario: These Schneiders are mounted in PR-1050 turrets - MANUAL turrets - turrets that USED to be motorized, but the mechanics were taken off because they were a "complicated unit" - to follow the KISS (keep it simple, stupid) rule of the theatre. Thus, with "stupid" people up in the booth, they were SLAMMING the turrets around to where they actually would knock the lateral alignment way out of kilter (in which I have threaten them with their very lives and positions if I EVER see anyone swing a turret disc around that hard again...!!!), whereas the motorized turret disc rotates in a far slower manner and being easy on the lens themselves. Thus, with this rapid rotation, this action would "rotate" the elements inside the attachment barrel themselves, thus knocking out the prime focus within the barrel. How close am I on this deduction that I just came up with? thx-Monte [ 07-04-2005, 05:48 PM: Message edited by: Monte L Fullmer ]  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-04-2005 05:38 PM                     Pretty close Monty! Especially if they grab the scope lens to turn the turrett. Slamming them around also does them no good. The TU-2000 was always a piece of crap, the only option is to replace it with the Kelmar turrett. Mark  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-04-2005 05:42 PM                     I really do not like the Kelmar Turret Far to complicated control and not very friendly to instal  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 07-04-2005 05:45 PM                     quote: Mark Gulbrandsen replace it with the Kelmar turrett. ..course, you know this will never happen...Have to do what with and make the best of it. How was the mountain retreat? Might be down in SLC around the week of the 18th. thx-Monte  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 07-04-2005 07:26 PM                     Kelmar also offers a manual version of their turret. The turret maybe not too friendly on set up but once adjusted....don't play with it  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.