Archived posting to the Leica Users Group, 2020/10/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks for the comments, Don.? I think you will find that 1.4s are very scarce. On 10/8/20 3:02 PM, Don Dory via LUG wrote: > 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 > > -- Jim Nichols Tullahoma, TN USA