No Words: Anything that jumps

<i>

"Tell us more about that life size adapter ... is it a close-up lens??"

</I>

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Nah, it's closer to a teleconverter in concept. It's a dedicated bit for the old (Kiron built) Vivitar Series 1 90mm f/2.5 Macro. The native lens focuses from infinity down to 1:2. If you insert the life size adapter between the lens and the body, you get down to 1:1 (and the lens had a special set of markings for it).

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It's actually kind of like an extension tube with 4 corrective elements in it. You can't focus to infinity with it installed.

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Apparently it works with some other lenses? Mine is 'in the wind' (stolen), though I still have the lens.

Peter,

if my memory is correct, this life-size adaptor will keep the speed of the master lens. Yes, the lens will loose some f-stop values as it it focused closer, but this particular life-size converter prevents the whole lens/converter combo from losing f-stop values which normally caused by attaching conventional extension tubes.

Last but not least,

this is another stunning job Arnab!

<i> if my memory is correct, this life-size adaptor will keep the speed of the master lens. Yes, the lens will loose some f-stop values as it it focused closer, but this particular life-size converter prevents the whole lens/converter combo from losing f-stop values which normally caused by attaching conventional extension tubes.</i>

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As has been said many times, and as Todd points out, this tube with corrective elements does nothing other than correct some aberrations at highre magnifications.

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It is better than Nikon's PN tubes. Lenses behave exactly the same when it comes to light transmission.

<center>Various jumping spiders:<P>

<img src="http://faculty.ucr.edu/~chappell/INW/arthropods/RFJS6.jpg"><P>

<img src="http://faculty.ucr.edu/~chappell/INW/arthropods/jumper5.jpg"><P>

<img src="http://faculty.ucr.edu/~chappell/INW/arthropods/thiodina8.jpg"><P>

<img src="http://faculty.ucr.edu/~chappell/INW/arthropods/yellowjumper4.JPG"><P>

</center>

<center><img src="http://d6d2h4gfvy8t8.cloudfront.net/3865972-lg.jpg"></center>

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200mm/3.5 ED-Nikkor + a TC