Archived posting to the Leica Users Group, 2020/10/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I think that the difference is close enough that I would use either depending on magnification needed. The extension tube is higher in contrast which helps perception of sharpness. In all things compromise is inherent so choice will be made based on priorities of the moment. I do appreciate the research as I now will be looking for an inexpensive R teleconverter although I might try for a 1.4. On Thu, Oct 8, 2020 at 1:10 PM Jim Nichols <jhnichols at lighttube.net> wrote: > I've been using the Leica-R 60 macro lens for a few days and began > wondering which gave the best results, adding the dedicated extension > tube or the tube plus the Leica-R 2X Extender. So, I did a kitchen > counter experiment. Using kitchen lights and a shiny dime, I first > combined the dedicated extension tube with the 2X extender and mounted > the assembly on an old Star-D tripod. I adjusted the height so that the > image of the dime filled the height of the frame, and took several > exposures. Here is the resulting image: > > http://www.gallery.leica-users.org/v/OldNick/20201008-DSCF2180.JPG.html > > I then removed the 2X Extender and mounted the lens and extension tube > as it was intended to be used. I took several images of the dime, which > now filled about half the height of the frame, and cropped the resulting > image to match the first one: > > http://www.gallery.leica-users.org/v/OldNick/20201008-DSCF2192.JPG.html > > It is my opinion that the lens/tube combination is sharper without the > 2X Extender, even with enlargement. I am ignoring differences in > lighting with this setup. > > -- > Jim Nichols > Tullahoma, TN USA > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information -- Don don.dory at gmail.com