Hello. This thread is going to be my little thread to talk about my current project. I have, after some months of interest and a week or so of intense information-gathering and decision-making, broken the speed barrier at least in title. Bye Bye f/1.4....Hello f/0.75! EDIT Oct.30 2005: See my shots with these lenses and pictures of them at my Nikonians gallery:http://www.nikonians-images.com/gal...61&[email protected]&password= I'll begin with a summary. Over the past year or so, I've gotten very deep into photography. I bought my D70 at the end of last year and received it on january 6th. 10 months, 6 lenses and 18,000 shots later, my skills are showing definite promise and improvement. But I've been looking for a way to help set myself apart. We have a few good still photographers at our school, and most of us are in the video department as well (all around a/v experts). I decided I should look for a specialty. Since day one I've been captivated by the work, and educated by the articles and posts of our very own nfoto, Dr. Bjørn Rørslett. His work with UV and IR photography has prompted me to explore those avenues, which I intend to do very soon. But one thing he has brought into the public is the ultra-fast lens. By this I mean truly unusual speeds for their focal length....95 f/1.4, 85 f/1.0, 75 f/1.1, and the lenses that break the f/1.0 barrier.... the 42mm f/0.75 and 60mm f/0.75 are just some examples. Thus, I decided that owing to their low cost, relatively easy modifications required, and the great opportunities for beautiful results, that I would try to acquire some ultra-fast X-ray lenses along the same lines as his, and modify them to fit on my D70. Over the past several days, I have been in contact with him regarding the modifications. He has helped me to plan out what I'll need and he has discussed the characteristics and peculiarities with me. I have found him nothing short of divine in kindness and wisdom. Based on his recommendations, I passed on a few Kowa lenses for my purposes and centered my focus on the Rodenstock lens brand. I've seen his work with the 42mm f/0.75 Rodenstock, and the 75mm f/1.1 rodenstock. I absolutely loved what I saw. So, I'm now the proud owner of the Rodenstock TV-Heligon 42mm f/0.75, and the XR-Heligon 55mm f/0.8, 68mm f/1.0, and 75mm f/1.1 The next step, which is somewhat more challenging than going off and buying the lenses themselves, is creating a workable mount. thanks to the advice and experience of Dr. Rørslett, I know exactly what to do. I intend to create two styles of mount, as he has. One involves the K series extension rings, and Cokin 52mm filter adapters. Another involves the BR-2A reversing ring and the BR-5 52-62 reversing ring step up adapter. I have already purchased the Br-2A and hope to own a K set tomorrow.... Basically, what I'm planning to do is permanently mount the 52mm male thread from the Cokin adapter onto the lens. This can then be mounted onto the K rings (using the appropriate combination to align the lens properly). In the BR-2A setup, the 52-62mm BR-5 is screwed onto the lens and then screwed into the BR-2A. This provides the bayonet mount. My intention is to have the right adapters for each lens attached to it most of the time with the exception of the final piece, the bayonet itself. I will probably use the BR-2A for only one lens right now, therefore it will remain on that lens most of the time, but with the K set, I will need to have one or two mount bayonets that can be switched between so I'll have enough. Eventually I may acquire more parts to be able to permanently mount the adapter onto the lens. In the meantime, I will only need to switch one or two parts between them. Of course, before I can do any of this and get out and shoot, I must do the modifications themselves. I will post my progress (including pictures, naturally) as time goes on and the project advances. Thanks for reading, hope you stay tuned for my updates.... and a special thank you to Bjørn Rørslett for his valuable assistance.