Really nice experiment, just one thing. Increasing the distance between the tube lens and sensor also changes magnification, right? I am used to work with raynox on a bellows and it does that, change magnification as you increase/decrease the bellows extension. So, with that 300mm tube lens plus 80...

Nikon plan apo 20/ 0.75 Nikon 300 mm tube lens and 8 cm extra distance between tube lens and sensor (compensating variation). Diffused led. The short WD distance made lighting troublesome, - I had to adjust the colours a little more than usual in Adobe PS (saturation and more contrast in the blue ch...

Thanks both Jörgen and Rik. Increasing the tube lens to sensor distance (actually focusing it closer than infinite), how it does affect the free working distance? I assume that it will be shorter than the nominal 1mm, am I right? Jörgen, any chance to view your tests at full resolution? Pau That is...

Hi Pau
No formula - more trial and error with combinations of tubes with fixed lengths, My best guess from the distances I did test is that optimum might be a little shorter.
/Jörgen

Thanks RB To follow up on compenasting variation with the Nikon plan apo 20x / 0.75 I did a series of pictures showing the difference between 1) a coverslip attached to the objective, 2) no coverslip and 3) no coverslip but 86 mm extra distance between sensor and tube lens - compensating variation: ...

Thanks for the nice comments! I pulled the stereo image into StereoPhoto Maker and blew it up so I could see all the details. The translucency showing structures on multiple levels comes through wonderfully. --Rik Yes - For translucent subjects like this it is realy worth the effort making stereo pi...

The genital aperture of a tick under UV light. I used a Nikon 20x fluor microscope objective.

Nice, thanks for posting.

Best regards
Jörgen Hellberg

Nice!
Best regards
Jörgen Hellberg

Congratulations!

Best regards
Jörgen Hellberg

I was actually out looking for snakes using my 400mm and one extension tube to get some extra distance not to disturb the animals. The 400mm pictures are not macro so I do not post them here. On my way back I used my 100mm macro. The first picture is a Wood anemone (Anemone nemorosa). The second is ...

Original and very nice!
Best regards
Jörgen Hellberg

Really nice!
Best regards
Jörgen Hellberg

Nice!
Best regards
Jörgen Hellberg

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