Fifty Posted June 11, 2013 Share Posted June 11, 2013 Hi folks! Long-time lurker / first-time poster. I've recently gotten a rather nifty item (which admittedly has sat on my desk as an ornament / paper weight) which I am hoping the knowledgeable folks here could help me identify. The photos below are of a Isco-Gottigen anamorphic lens model KA298, I've Googled a bit, but haven't really found any good information about this lens or the backup lens it came with (this is the most mysterious part to me, I assume this backup lens is what took the small 35mm image and magnified it for the big screen). Anyone come across this setup before and able to give me a history lesson on this lens? Truthfully, I love its look and weight and it will most likely sit a paper weight, but I would love to know more about it and if it has any use today. I've tried playing around with it, but given its weight (its crazy heavy) and currently no support system, its difficult to use and get a feel for. Quote Link to comment Share on other sites More sharing options...
silvertonesx24 Posted June 12, 2013 Share Posted June 12, 2013 A vid anamorphic clamp and some rail supports will mount this nicely. I don't know much of the history of this lens except that all variations of this lens (Isco Gottingen, Schneider Isco, Iscorama, etc) are all optically and mechanically identical as far as I've seen. They were used by movie theaters on film projectors and cost around $4000 when new. The anamorphic image you get from this will be very sharp, even wide open. You won't get any flares as it is multi-coated. It's pretty easy to drop a diopter in the front barrel for closer focus. The only big downside is the size and weight. Quote Link to comment Share on other sites More sharing options...
andy lee Posted June 12, 2013 Share Posted June 12, 2013 these lenses are great super sharp and produce cool blue flares I've had over 25 of these lenses you can use them with the Tecnoir 15mm lens support , it supports the full weight of the lens on your 15mm rods and has a locking lens support ring that hold the lens in its correct horizontal allignment - you dont need any clamp with this http://www.ebay.co.uk/itm/230995210361?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1586.l2649 The Tecnoir lens support for 15mm rods will work with this Isco and also with Baush and Lomb, Carl Zeiss, Hypergonar Hi Fi , Moller ,Schneider Anamorphic lenses Quote Link to comment Share on other sites More sharing options...
Fifty Posted June 13, 2013 Author Share Posted June 13, 2013 Wow, thanks guys! I'll go research the Schneider Isco's as I haven't read about those yet. @silvertonesx24: Any links to a diopter that would work with this? The front element is massive and I can't imagine anything smaller that 105mm covering it. @andy lee: Thanks for the tip that Tecnoir looks nice. I don't currently own a rail system so this is a very nice excuse to buy one. Any chance you have some footage of something you've shot over the years with 1 of these lenses? @both: Silly question, please forgive my Anamorphic newbness. The smallest focal range is 17ft (so it says on the lens) with a +0.5 diopter, does that cut that range in half? How do you do the math? I ask cause I see a lot of +1, +2, etc. close up lenses, but most on this forum recommend +0.5. Thanks for all your help!!!! Quote Link to comment Share on other sites More sharing options...
Julian Posted June 13, 2013 Share Posted June 13, 2013 @andy lee: Thanks for the tip that Tecnoir looks nice. I don't currently own a rail system so this is a very nice excuse to buy one. Any chance you have some footage of something you've shot over the years with 1 of these lenses? ~€5 http://www.ebay.co.uk/itm/Aluminum-Tripod-Mount-Ring-Support-Collar-for-Canon-EF-100mm-F2-8-USM-Macro-Lens-/ ~€55 http://www.ebay.nl/itm/200903091120?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 ~€35 http://www.ebay.nl/itm/151035085743?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 This is all you need and it includes rails etc. Recently bought these parts and it works nice. Can't get it any cheaper than this probably and the quality isn't bad at all. Will post a better picture of this setup soon. Was planning to to open a topic about it... dahlfors and JohnBarlow 2 Quote Link to comment Share on other sites More sharing options...
silvertonesx24 Posted June 14, 2013 Share Posted June 14, 2013 Wow, thanks guys! I'll go research the Schneider Isco's as I haven't read about those yet. @silvertonesx24: Any links to a diopter that would work with this? The front element is massive and I can't imagine anything smaller that 105mm covering it. @andy lee: Thanks for the tip that Tecnoir looks nice. I don't currently own a rail system so this is a very nice excuse to buy one. Any chance you have some footage of something you've shot over the years with 1 of these lenses? @both: Silly question, please forgive my Anamorphic newbness. The smallest focal range is 17ft (so it says on the lens) with a +0.5 diopter, does that cut that range in half? How do you do the math? I ask cause I see a lot of +1, +2, etc. close up lenses, but most on this forum recommend +0.5. Thanks for all your help!!!! Regarding the diopter, I would start with these for cheap. 82mm threads. 86mm might work too. http://www.amazon.com/82mm-Close-Up-Filter-Diopters-Magnificatoin/dp/B008HSAGXI/ Regarding the math, I honestly have no idea how that works. A +.5 or +.4 diopter is going to be rare though and much more expensive than +1. With some of my taking lenses I know I've focused sharply just under 10 feet with these. I haven't done any official tests though. Quote Link to comment Share on other sites More sharing options...
Tito Ferradans Posted June 14, 2013 Share Posted June 14, 2013 If you want to understand diopters, check their thread! hahaha http://www.eoshd.com/comments/topic/2570-the-diopter-thread/ almost everything covered. :) Quote Link to comment Share on other sites More sharing options...
JohnBarlow Posted June 15, 2013 Share Posted June 15, 2013 I have the Fotga rod system shown below. In general I like Fotga products, the quality is very good ~€5 http://www.ebay.co.uk/itm/Aluminum-Tripod-Mount-Ring-Support-Collar-for-Canon-EF-100mm-F2-8-USM-Macro-Lens-/ ~€55 http://www.ebay.nl/itm/200903091120?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 ~€35 http://www.ebay.nl/itm/151035085743?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 This is all you need and it includes rails etc. Recently bought these parts and it works nice. Can't get it any cheaper than this probably and the quality isn't bad at all. Will post a better picture of this setup soon. Was planning to to open a topic about it... Quote Link to comment Share on other sites More sharing options...
Fifty Posted June 15, 2013 Author Share Posted June 15, 2013 @Julian, I actually just purchased the Filmcity version like that. I got that one simply because it had a lens support on it already (and it was red :P). I did buy a second tripod collar though as you mentioned. Please do open a thread, I'd like to see what your experience with that system is like. Once I receive mine, I'll gladly add to it. @tferradans, I have been reading that thread (on my second go as I skimmed through the first time). Maybe I missed it, but was the math or reason as to why you choose +0.5, etc ever covered? Out of curiosity do any of you guys know the use of the backup lens? Does it have a practical use for dslr owners (if not, no worries, it's weight makes it a fantastic paper weight or book-end). Quote Link to comment Share on other sites More sharing options...
silvertonesx24 Posted June 15, 2013 Share Posted June 15, 2013 Out of curiosity do any of you guys know the use of the backup lens? Does it have a practical use for dslr owners (if not, no worries, it's weight makes it a fantastic paper weight or book-end). No practical use. Paperweight Quote Link to comment Share on other sites More sharing options...
Tito Ferradans Posted June 15, 2013 Share Posted June 15, 2013 @tferradans, I have been reading that thread (on my second go as I skimmed through the first time). Maybe I missed it, but was the math or reason as to why you choose +0.5, etc ever covered? The strength of the diopter (X) fits in the simple math below: 1m/X = maximum focus distance (Y). Y/2 = minimum focus distance So, this way, a +0.5 diopter covers the 1-2m focus range, where most anamorphics fall short, and most regular shots are set. :) No practical use. Paperweight I'll disagree, but it's not easy to say so. My Isco came with a 100mm fixed focus lens, for projection. The thing about is: flange distance is huge. It means that, to reach infinity focus, the lens must be much farther away from the sensor (this 100mm of mine reaches infinity about 2cm outside the EF mount (~66mm). So, if you're into free-lensing, or lens whacking, your projector lens might be cool to use. I wouldn't use it with any anamorphics, though, because keeping the whole thing aligned, while loose is nearly impossible. :P Quote Link to comment Share on other sites More sharing options...
andy lee Posted June 16, 2013 Share Posted June 16, 2013 put projection lens in Red Stan Clamp - add a helicoid on the back - add to camera - take superb images - bingo! - easy Projection lenses are incredable - amazingly sharp at f2 - fully open as they are designed to be used fully open as thay have NO apperture we are taking sharper than Canon L series glass I use Schneider lenses alot they are simply stunning lenses Quote Link to comment Share on other sites More sharing options...
Shredflakes Posted August 22, 2013 Share Posted August 22, 2013 Hey JohnBarlow, Is it not neccessary to "clamp," or at least in some way attach the taking lens directly to the ISCO lens? I can't tell if in your kit image the ISCO is merely infront of the taking lens or if they are attached. I just ordered a cheap KA298 on ebay, as well as the 3 parts you recommended! So excited to experiment with anamorphic on my new 6D. Any input would be highly appreciated! Sincerely, Alexi Quote Link to comment Share on other sites More sharing options...
JohnBarlow Posted August 22, 2013 Share Posted August 22, 2013 I think you meant Julian, I was just supporting his Fotga recommendation :) Quote Link to comment Share on other sites More sharing options...
Tito Ferradans Posted August 22, 2013 Share Posted August 22, 2013 Anyway, the lenses don't need to be ATTACHED together. If they're just close enough, anamorphic magic should happen. :P Quote Link to comment Share on other sites More sharing options...
Julian Posted August 22, 2013 Share Posted August 22, 2013 It's not attached in my setup. That wouldn't allow any movement and you need some movement for focussing. Or you have to use a lens that doesn't move at all while focussing. Quote Link to comment Share on other sites More sharing options...
enny Posted August 23, 2013 Share Posted August 23, 2013 Andy what do you mean sharp at f2? as in lens that can shoot f2 or setting on a camera? thanks Quote Link to comment Share on other sites More sharing options...
Nikkor Posted August 24, 2013 Share Posted August 24, 2013 What are the dimensions on these anyway? And are they really all the same? And lastly, how do they compare to a isco Kiptar 2x? Quote Link to comment Share on other sites More sharing options...
Tito Ferradans Posted August 25, 2013 Share Posted August 25, 2013 Andy what do you mean sharp at f2? as in lens that can shoot f2 or setting on a camera? thanks Hey enny, He means that, even if the taking lens is at f/2 (aperture), the image with the anamorphic is razor sharp. :) pedrambahrami 1 Quote Link to comment Share on other sites More sharing options...
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