----- Original Message ----- From: "David Zaninovic" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, May 10, 2005 3:08 PM Subject: Re: reverse mounting lenses
> How much extension did you had to add to that macro lens ? You also focused the macro as close as possible, right ? I'll give you my examples: with a vivitar 105mm macro and 50mm f1.7 lens I needed to focus as close as possible to avoid vigneting. If I reversed a 24mm lens, i needed to add more extension. With the 200/4 and a reverse mounted 100mm bellows lens, regardless of how close i focused the 200mm i needed to add more extension. Even more was required when reversing the 50mm on the 200mm > Were you able to shoot at f11-f22 without vignetting ? Does the extension that you add have more effect than the built-in extension or it is the > same thing ? See above examples. I always shot stopped down to at least f11, mostly f16, to get as much DOF as possible. When you add extension, you lose light so you (or your camera's meter) will have to compensate. I always shot using TTL flash with the LX or *ist D in manual mode. Is the rear element on the FA 100/2.8 fixed or it moves depending on the focus ? I see that the built-in extension on > my lens has very little difference in regard to vignetting so I am afraid that I would have to add to much extension tubes which > would be unmanageable. Is there any automatic extension tubes that would pass the electrical contacts as well as aperture control > so I can keep P-TTL. The reason you have to add more extension is because of the combination you are trying. as Jostein, myself and John Shaw suggest, not all combinations work. My favorite was the 100mm SMCP bellows lens reversed on the 200mm SMCP-A f4 lens. I added about 24mm of extension (the middle tube). (2x life size) http://www.skofteland.net/displayimage.php?album=4&pos=9 - ist D with P-TTL flash The beauty of this combo is that both lenses have a 52mm thread and I had a male-male 52mm reversing ring. The next favorite was the 200/4 with a 50mm SMCP-M f1.7 lens reversed. I needed the 32mm extension tube to avoid vignetting at f16. (4x life size) BTW, make sure the reversed lens is WIDE OPEN. I used the Vivitar auto extension tube set that have full meter and aperture coupling. They don't make them anymore but i believe the Kenko tubes are the same (they LOOK identical). Christian
