Ariel Glikson Posted October 23, 2006 Share Posted October 23, 2006 Hello friends, I saw this this adaptor: Angenieux With Carl Zeiss CLA 35 HD: HD Adapter for 35mm Prime Lenses in http://www.smsprod.com/products/lenses/angenieux4.html Do you know it? any experience with that? any idea how much does it cost? Ariel. Link to comment Share on other sites More sharing options...
Premium Member John Ealer Posted October 28, 2006 Premium Member Share Posted October 28, 2006 Hello friends,I saw this this adaptor: Angenieux With Carl Zeiss CLA 35 HD: HD Adapter for 35mm Prime Lenses in http://www.smsprod.com/products/lenses/angenieux4.html Do you know it? any experience with that? any idea how much does it cost? Ariel. Pulled from a Zeiss White Paper: Digital camera manufacturer Sony, striving to gain acceptance for their CineAlta ® High Definition 24p cameras in the cine industry, contacted cine lens maker Carl Zeiss in order to find a solution to the lens problems that were observed. This solution would make it easy for the cine rental houses to add the High Definition 24p cameras to their existing inventory and simply use their existing and proven high quality cine lenses on the new cameras, by means of an adapter. This adapter would couple a cine lens to the High Definition 24p camera, both mechanically and optically. Optically, it would down convert the image from the cine lens by a factor of 2.5x to fit it to the size of the 2/3 inch image receiver chips of the digital camera. This would have to be done with virtually no loss in image quality. The resulting product, the cine lens adapter CLA 35 HD, created by a collaboration of lens manufacturers Angenieux and Carl Zeiss, compressed the image from a Zeiss Ultra Prime lens for 35 mm cine, with a frame diagonal of 30 mm, to the size of the 2/3 inch imager, with an image diagonal of 11 mm, with virtually no loss. The resulting image showed 2.5x the resolution of the original cine lens and was 2.5 stops faster. Thus, the aperture of e.g. T 5.6 on a cine lens would convert into T 2.4 with the CLA 35 HD. The maximum resolution, output by the CLA 35 HD, would theoretically exceed 500 line pairs per millimeter (lp/mm). However, the camera?s resolution limit, defined by the imager chip?s architecture with 1920 x 1080 pixels on an area of 9.6 mm x 5.4 mm and expressed by its Nyquist-frequency, is 100 lp/mm. Optically, the CLA 35 HD approach was successful. However, it came with two drawbacks: ? The CLA 35 HD, inserted between cine lens and camera, added some 200 mm to the length of the lens and 1.4 kg to the weight. ? Also, being a relay it inverted the image upside down and reversed left and right, thus requiring an electronic image inversion circuit in the camera. Link to comment Share on other sites More sharing options...
Ariel Glikson Posted October 28, 2006 Author Share Posted October 28, 2006 Thanks John for this information. so...I guess the p+s technik pro35 is still the only option to use cine lenses on 2/3 video cameras. How come there is no competition to the Pro35? How come they are alone in this market? or is it something I'm missing? Ariel. Link to comment Share on other sites More sharing options...
Premium Member Stephen Williams Posted October 28, 2006 Premium Member Share Posted October 28, 2006 Thanks John for this information.so...I guess the p+s technik pro35 is still the only option to use cine lenses on 2/3 video cameras. How come there is no competition to the Pro35? How come they are alone in this market? or is it something I'm missing? Ariel. Hi, There are other players in the market, but it's a tiny market. Stephen Link to comment Share on other sites More sharing options...
Premium Member John Ealer Posted October 28, 2006 Premium Member Share Posted October 28, 2006 Thanks John for this information.so...I guess the p+s technik pro35 is still the only option to use cine lenses on 2/3 video cameras. How come there is no competition to the Pro35? How come they are alone in this market? or is it something I'm missing? Ariel. Well, though I'd read about the CLA 35 HD adaptor, before your post I'd never seen it in the market anywhere. If it's available, I'm sure it will work and work well. Unlike the Pro35 adaptor, you don't have the light loss issues and you don't have the spinning ground glass (for better or for worse). J Link to comment Share on other sites More sharing options...
Mitch Gross Posted October 30, 2006 Share Posted October 30, 2006 Well, though I'd read about the CLA 35 HD adaptor, before your post I'd never seen it in the market anywhere. If it's available, I'm sure it will work and work well. Unlike the Pro35 adaptor, you don't have the light loss issues and you don't have the spinning ground glass (for better or for worse). J You also have an inverted image and no change in depth of field, which is the reason most people use these adapters in the first place. You also have a very long lens in front of your camera. This device has been around for awhile, and there's a reason you haven't heard much about it. It functions fine, but its usefulness is limited. Link to comment Share on other sites More sharing options...
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