bocaburger Posted August 15, 2011 Share #41 Posted August 15, 2011 Advertisement (gone after registration) In that case you will need to stick the little piece of foam above the sensor to avoid it being confused by stray light from the SFILL. I just put a piece of tissue paper inside the wide-angle snap-on diffuser, as it seems to produce the same effect as the SFILL, and no need to stick anything on to anything. Have you ever seen THESE? I've been using them for years. The Mini works on the SF24, but you have to sort of pull it up to not block the sensor. Link to post Share on other sites More sharing options...
Advertisement Posted August 15, 2011 Posted August 15, 2011 Hi bocaburger, Take a look here Ring Flash. I'm sure you'll find what you were looking for!
Guest #12 Posted August 15, 2011 Share #42 Posted August 15, 2011 ...Lester Dine's company (owned now by his grandson) is 20 minutes from me. Lester did invent the ring flash. There were other macro flashes before then (Nikon had one in the sixties) but they were comprised of four straight tubes mounted around the lens. Dine's was the first to use a circular flash tube. 1952 was just when he started his company, and he didn't do it specifically for dentistry (which at the time was mostly still drill-fill-pull), he invented it for medical photography in general, but eventually found his greatest market in dentists and dermatologists. Read their corporate ad copy for comprehension and you will see. No disrespect, but you and Jaap are just copying from advertising. There are prior patents for ring flashes with circular flash tubes (at the end of a lens, attached to a lens board). Interestingly, the Dine patent seems to be for putting the flashtube on a step ring. There is not much new here anyway; axial lighting is probably about as old as photography. Link to post Share on other sites More sharing options...
leicashot Posted August 15, 2011 Share #43 Posted August 15, 2011 I thought this thread was all over and done with....this is not going to end well. Link to post Share on other sites More sharing options...
bocaburger Posted August 15, 2011 Share #44 Posted August 15, 2011 No disrespect, but you and Jaap are just copying from advertising. Can only speak for myself, but I was repeating what the late Lester Dine said to me (and I'm guessing an untold number of others, over the years) in person. So if he doesn't deserve credit for inventing the ring flash, he definitely deserves it for nervy self-promotion In fact, I've probably cost him some business over the years, colleagues who know I'm a photo enthusiast and asked me my opinion of the Dine Medical/Dental camera (or the long-defunct Yashica Dental Eye) were met with my recommendation that they could buy a better body, better flash and better lens all for less money. Link to post Share on other sites More sharing options...
Guest #12 Posted August 15, 2011 Share #45 Posted August 15, 2011 I remember seeing a huge ring flash mounted on a bracket attached to the tripod, where the camera (a Hasselblad) could rotate within the ring. In other words, the ring was larger than the camera, not just larger than the front lens diameter. In that sort of setup the Leica viewfinder would not be blocked. However it's a studio apparatus, not something an amateur photographer would carry around to shoot with a Leica.... There are all sizes. I found some notes I made last time this topic came up; the little ring flashes go up to an inner diameter of 9cm, and the studio flashes start at 10cm. Either one (9 or 10cm) should allow focusing on the Leica. For my brand the ring (which I don't have) is about 2 lbs., and the power pack is about 4-5 lbs. and goes in a hip sling. So you could take that out and about, but it would look pretty dumb on the camera. I have seen a write-up by someone who used studio ring flash with an M camera; worked just fine, but he complained the model could no longer see him and he wouldn't try it again. Link to post Share on other sites More sharing options...
Guest #12 Posted August 15, 2011 Share #46 Posted August 15, 2011 Can only speak for myself, but I was repeating what the late Lester Dine said to me (and I'm guessing an untold number of others, over the years) in person. So if he doesn't deserve credit for inventing the ring flash, he definitely deserves it for nervy self-promotion ... Maybe he was first to sell one? I had found a G.E. patent filed in 1945 (#2501405): It was a circular Xenon flash tube in a plastic housing bolted to the lensboard, encircling the end of the lens, with a clear plastic cover. Looks like a ring flash to me. I am really interested to know if it was ever built. Sorry--didn't know you had a source besides the website. Link to post Share on other sites More sharing options...
leicashot Posted August 15, 2011 Share #47 Posted August 15, 2011 Advertisement (gone after registration) how is all this helping the OP, or anyone? Possibly something for PM? Link to post Share on other sites More sharing options...
bocaburger Posted August 16, 2011 Share #48 Posted August 16, 2011 how is all this helping the OP, or anyone? Possibly something for PM? Well the thread is titled "Ring Flash", we're discussing ring flashes, and it's a civil discussion w/no flaming. Maybe it will help someone searching someday. Sorry if it doesn't interest you. Link to post Share on other sites More sharing options...
leicashot Posted August 17, 2011 Share #49 Posted August 17, 2011 Well the thread is titled "Ring Flash", we're discussing ring flashes, and it's a civil discussion w/no flaming. Maybe it will help someone searching someday. Sorry if it doesn't interest you. Whatever's best for the forum... Link to post Share on other sites More sharing options...
Guest #12 Posted August 30, 2011 Share #50 Posted August 30, 2011 ...The ring flash was invented that way by a Mr. Dine for dental use as a flash around the lens... ...in case someone had the same idea, I asked about the current Dine flash...it's only 3" in diameter, the smallest I've seen, and will not block the patch...but it has no auto sensor or manual control. Link to post Share on other sites More sharing options...
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