Re: [test] extension tubes on magnification of macro lenses

* Blinky the Shark wrote :
> Troy Piggins wrote:
>> * jimkramer wrote :
>>> Troy Piggins wrote :
>>> [---=| Quote block shrinked by t-prot: 41 lines snipped |=---]
>>>
>>> But testing the 100mm with tubes is sooooo much fun!!!
>>> http://www.jlkramer.net/Pictures/100mm/100mmTest.htm
>> 
>> :)  Good tests.  Wish I'd seen them earlier, but I still would
>> have done my own.  I don't understand inches, I'm all metric
>> baby!  I also wanted to understand it all in terms of
>> magnification.  Perhaps you could add that sort of info to your
>> page.
>
> I have no series (and certainly no art <g>) to contribute but a few
weeks
> ago I just had to see what this setup would do[1]:  D60, 18-55mm (at
18mm)
> reverse-mounted on the front of 55-200mm (zoomed in until the image was
no
> longer inside a black circle <g>).  These are mm marks on a wooden
ruler;
> the image is not cropped.
>
> http://blinkynet.net/stuff/mm_marks.jpg
>
> Thank God for the new rails.  :)
>
> [1] There was probably math to do this, but, you know...  :)

That's pretty big magnification!  Impressive.  Understand now how
hard it must've been to control.

-- 
Troy Piggins
I always appreciate critique.