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Exploring a Micro World 7 pics

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MightyMike

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So someone gave me an old zoom projector lens for free (Raynox 100-200mm F3.5 6 group 8 element) well it was dirty and old but i managed to take it appart and clean it up... yes including some of the internal glass elements... i realize that its of litle use to me except that the back piece (4 group 5 element) works like a very powerful achromatic macro lens (+14 to +15 diopter approx.) so i figured i'd give it a try by holding it up to the camera and taking some shots...
  • none of these shots have been cropped
  • horizontally each shot represents 8mm (full size each pixel = 2.45microns)
  • there is vignetting present in a few shots (i'm working on that)
  • the only noticable CA is in out of focus areas
  • the DOF is between 0.75mm and 1mm


the hexagons in this photo are glitter they are approx. 375 microns wide and 17 microns think (0.375mm, 0.017mm)













Questions and comments are welcome!
--
Mike from Canada



http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=61&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=
 
GREAT !!

For those of us who can read rulers but don't have a "mental picture" of microns, what plant is that ?

How's about a photo with this lens of something we'd be sure to recognize?

These are really nice - it's just hard to know which micro world we're deling with, here.

Thanks and Happy New Year -Erik
 
A micron is one millionth of a meter, or about 39 millionths of an inch.

Roughly 4/100000 of an inch. Normalized: 1/25000 inch. So, a little more than 25,000 microns per inch.
 
JosephScha said:
A micron is one millionth of a meter, or about 39 millionths of an inch.
Click to expand...
MightyMike said:
Roughly 4/100000 of an inch. Normalized: 1/25000 inch. So, a little more than 25,000 microns > per inch.
Click to expand...
I believe - if you will check - that I SAID I can read a ruler, but would like an image one can relate to. No lecture was called for.

Thanks for supplying a photo of the actual plant at normal size! The original photos looked for all the world like onion leaves!

Now that we have a better feel for the true size, and the surroundings, I suppose the hexagons aren't small life forms ;-)
 
to dust off my old (like 40+ years) Pentax screw mount (!) 135MM f 2.8, reverse it and hold it in front of my FZ50. Lo and behold, it works as an uber-macro with a good deal of distance from the lens front to the subject (much better than the 55mm Pentax stock lens).

Back in the day I did a lot of macro photography (nature, medical) on 35MM film, using a Pentax Spotmatic, macro lens, close-up bellows, ring-flash, etc. Next step will be to get a double-male 55mm adapter since both the FZ50 and 135mm lens have 55mm front filter threads.

I have also ordered the Raynox 150 and 250, since I'm a bit concerned putting the weight of the 135 on the FZ50 lens mount.

Thanks for some inspiration.
 
dontfret said:
to dust off my old (like 40+ years) Pentax screw mount (!) 135MM f
2.8, reverse it and hold it in front of my FZ50. Lo and behold, it
works as an uber-macro with a good deal of distance from the lens
front to the subject (much better than the 55mm Pentax stock lens).
Back in the day I did a lot of macro photography (nature, medical)
on 35MM film, using a Pentax Spotmatic, macro lens, close-up
bellows, ring-flash, etc. Next step will be to get a double-male
55mm adapter since both the FZ50 and 135mm lens have 55mm front
filter threads.
I have also ordered the Raynox 150 and 250, since I'm a bit
concerned putting the weight of the 135 on the FZ50 lens mount.

Thanks for some inspiration.
Click to expand...
135mm reversed = +7.4 diopter
Raynox 150 = 5.6 dipoter
Raynox 250 = +9 diopter

as for the doube male... well you have to make your own.

--
Mike from Canada



http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=61&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=
 
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