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Photo Forum / Digital Photography / DSLR Cameras / February 2007re: lens reversal ring/adapter
After reading on this ng about the lens reversal ring, I bought one and tried it out. Test shot of ballpoint pen. Dave http://www.geocities.com/tonguesten@sbcglobal.net/ballpen_web.jpg > After reading on this ng about the lens reversal ring, I bought one > and tried it out. Test shot of ballpoint pen. Dave > http://www.geocities.com/tonguesten@sbcglobal.net/ballpen_web.jpg Congratulations, it really looks good. Rita >> After reading on this ng about the lens reversal ring, I bought one >> and tried it out. Test shot of ballpoint pen. Dave >> http://www.geocities.com/tonguesten@sbcglobal.net/ballpen_web.jpg > > Congratulations, it really looks good. Yeah, that is pretty damned cool. Greg  SignatureThe ticketbastard Tax Tracker: http://www.ticketmastersucks.org/tracker.html >>> After reading on this ng about the lens reversal ring, I bought one >>> and tried it out. Test shot of ballpoint pen. Dave [quoted text clipped - 5 lines] > > Greg I just want to say THANKS to everyone who contributes to this ng. I know it is TV and radio's job to sell the sensational, so all you hear is bad about the Internet. I had a chip on my shoulder when I bought my D70 a couple years ago, because, as a young man I had a darkroom (b&w) and a 35mm camera and am decent on the computer. I 'thought' I knew something, but was lost with the D70. So most of my knowledge and skill have come from this ng and the c.p.printer ng. Thanks to all!!! Dave M. >>>> After reading on this ng about the lens reversal ring, I bought one >>>> and tried it out. Test shot of ballpoint pen. Dave [quoted text clipped - 14 lines] > have come from this ng and the c.p.printer ng. Thanks to all!!! > Dave M. You are welcome! We all learn from these discussions... so... the exif on that says 2 seconds f/3.5, therefore I assume you stopped down the 50mm lens? If that's what you used... Do you recall how far stopped down before it vignetted? >>>>> After reading on this ng about the lens reversal ring, I bought one >>>>> and tried it out. Test shot of ballpoint pen. Dave [quoted text clipped - 20 lines] > 50mm lens? If that's what you used... Do you recall how far stopped down > before it vignetted? The 50 mm was wide open, as soon as I stopped it down any it vignetted, I stopped the 105mm to 32 (as far as it would go) in hopes of getting 'some' depth of field, not sure how much it helped, should have tried different settings.........Dave M. >>> I just want to say THANKS to everyone who contributes to this ng. I >>> know it is TV and radio's job to sell the sensational, so all you [quoted text clipped - 14 lines] > 'some' depth of field, not sure how much it helped, should have tried > different settings.........Dave M. Having never done this before how do you stop down the outer lens? I thought lenses of the last couple of decades, even those with aperture rings, only stop down when you shoot? Greg SignatureThe ticketbastard Tax Tracker: http://www.ticketmastersucks.org/tracker.html >>> You are welcome! We all learn from these discussions... so... the >>> exif on that says 2 seconds f/3.5, therefore I assume you stopped [quoted text clipped - 8 lines] > thought lenses of the last couple of decades, even those with aperture > rings, only stop down when you shoot? The only lens you stop down is the main lens that is on the camera. If you stop down the reversed lens you will get vignetting. Rita >>>> You are welcome! We all learn from these discussions... so... the >>>> exif on that says 2 seconds f/3.5, therefore I assume you stopped [quoted text clipped - 11 lines] > The only lens you stop down is the main lens that is on the camera. If you > stop down the reversed lens you will get vignetting. I understood that. Since the others were discussing stopping the 50mm down I was just wondering how one would do that? Greg SignatureThe ticketbastard Tax Tracker: http://www.ticketmastersucks.org/tracker.html >>>> I just want to say THANKS to everyone who contributes to this ng. I >>>> know it is TV and radio's job to sell the sensational, so all you [quoted text clipped - 15 lines] >> of getting 'some' depth of field, not sure how much it helped, should >> have tried different settings.........Dave M. Oops, I read the exif wrong. The DOF & sharpness look great, reduced to web size at least. > Having never done this before how do you stop down the outer lens? I > thought lenses of the last couple of decades, even those with aperture > rings, only stop down when you shoot? I don't have a 50mm but my 45mm AI-P is modern and has an aperture ring that stops down when it's not mounted on a body. I think the 50/1.8 is the same but I'm not sure, the 45 is an odd one: very simple pancake design. I'm also not positive that is the correct way to stop down but I believe I read that it is... and unless I messed up, my own experiments showed that it gives better sharpness. Here's the 45 on a 105 with the 45 stopped down to f/11 & the 105 wide open at f/4.8, closest distance (no vignetting)looking at the computer monitor: <http://www.edgehill.net/1/?SC=go.php&DIR=Misc/misc-photos/2007-02-25-macro> This was a quick test, it's possible I didn't have the focus right. Here's some with an old fashioned 28mm f.2: <http://www.edgehill.net/1/?SC=go.php&DIR=Misc/photography/2006-11-19_105x2-28-macro> >>>>> I just want to say THANKS to everyone who contributes to this ng. >>>>> I know it is TV and radio's job to sell the sensational, so all you [quoted text clipped - 39 lines] > Here's some with an old fashioned 28mm f.2: > <http://www.edgehill.net/1/?SC=go.php&DIR=Misc/photography/2006-11-19_105x2-28-macro> There is a little 'lock' you move, then you manually set the aperture with the aperture ring. According to G.T. <getnews1@dslextreme.com>: [ ... ] > > The 50 mm was wide open, as soon as I stopped it down any it vignetted, > > I stopped the 105mm to 32 (as far as it would go) in hopes of getting [quoted text clipped - 4 lines] > thought lenses of the last couple of decades, even those with aperture > rings, only stop down when you shoot? That is when the lens is on the camera body. There is a tab projecting out of the back of the lens mount which engages a lever inside the camera body. This holds the lens wide open for focusing and composing, and the lever moves out of the way when the mirror also moves out of the way, allowing the lens to stop down to whatever the setting is. I presume that the lever only moves part of the way to control the lens' aperture during the shot when the body is determining the aperture. The lock which someone else mentioned is to keep the aperture ring set to the smallest aperture so the camera body can select any aperture within its range. Otherwise it would stop at whatever aperture is set on the ring. When the lens is not normally mounted on the camera body, there is nothing to stop the tab, so the lens stops down to whatever is set on the ring -- on with lenses which have no ring (like the 18-70mm kit lens) it stops all the way down. So -- your reversed lens will need an aperture ring, and that will need to be set to the maximum aperture (most open) to keep the lens from stopping down. Or -- you will need to use a rubber band or some wire to hold the tab to keep the lens wide open. I hope that this helps, DoN. SignatureEmail: <dnichols@d-and-d.com> | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
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