Search found 596 matches

by dmillard
Wed Aug 08, 2018 6:00 pm
Forum: Equipment Discussions
Topic: Tube Lens Test With MITUTOYO 5X M Plan APO
Replies: 66
Views: 9553

Hello Robert, Just another confirmation - I saw your earlier thread about the 6.7X magnification you got when setting up the ITL200 following Thorlabs' diagrams, and ran a test this afternoon using this tube lens in both orientations with a 10X Mitty. I got 9.9X using it in both directions. This may...
by dmillard
Thu Jul 12, 2018 5:06 am
Forum: Equipment Discussions
Topic: New controllers and setups from Ukraine
Replies: 11
Views: 3504

That's a beautiful object!
by dmillard
Mon Jul 09, 2018 7:20 am
Forum: Equipment Discussions
Topic: A great price for a compact high CRI LED panel!
Replies: 2
Views: 698

A great price for a compact high CRI LED panel!

I just ordered a couple, but there were still six left ; )

https://www.ebay.com/itm/Cineo-Lighting ... 2381196389?
by dmillard
Fri Dec 29, 2017 8:26 am
Forum: Equipment Discussions
Topic: Inexpensive dark field adapter
Replies: 8
Views: 1506

Nice and effective! How do you illuminate the mirror?, maybe with a ring of light from the rear of the subject (what's called a Lieberkühn reflector)? Thanks Pau. I used a pair of Novoflex Macrolight Plus lights, with Vivitar 183 flashes. See here Nice picture and thanks for the idea! I like the bl...
by dmillard
Thu Dec 28, 2017 12:48 pm
Forum: Equipment Discussions
Topic: Inexpensive dark field adapter
Replies: 8
Views: 1506

Inexpensive dark field adapter

A quick and easy “dark field” adapter made from a solar cigarette lighter, readily available on eBay for just a few dollars (see for example here ). I removed the metal coil, and cut a plastic vial to reach the position at which the end of the cigarette would rest in the coil (the focus of the parab...
by dmillard
Wed Nov 02, 2016 6:18 am
Forum: Photography Through the Microscope
Topic: insects
Replies: 23
Views: 1878

Amazing images!
by dmillard
Tue Nov 01, 2016 9:15 pm
Forum: Administrator's Appreciation Gallery...Photography Through the Microscope
Topic: Keratella quadrata?
Replies: 9
Views: 7116

Beautiful image!
by dmillard
Tue Nov 01, 2016 6:32 am
Forum: Equipment Discussions
Topic: very long working distance macro
Replies: 15
Views: 2983

One reason that I wanted to start with the 600 mm f/4 lens is that after extension I will still only be at an effective f-stop of f/8 at 1X. The big process lenses are typically f/9 to start with which will take me to f/18 effective so I worry about diffraction. That said, I bought a 610mm apo nikk...
by dmillard
Sun Oct 30, 2016 3:08 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Immature anthers in semi-dissected floret
Replies: 10
Views: 1638

Nice - I really like the color palette! And a 600 image stack needing no retouching is an enviable accomplishment. :wink:

David
by dmillard
Sun Oct 30, 2016 2:59 pm
Forum: Photography Through the Microscope
Topic: Wandering Mestra egg
Replies: 11
Views: 860

Thanks Olympusman and Sumguy01!
zzffnn wrote:Thank you very much, David. I found some images.

Cheers,
Fan
Thanks for letting me know Fan, and good luck locating some eggs!

David
by dmillard
Sat Oct 29, 2016 5:56 am
Forum: Equipment Discussions
Topic: Tube Lens tests - medium format and full frame
Replies: 45
Views: 15658

The close up lenses are all very fast - for example the Raynox DCR5320AB has a focal length in this test of 192 mm. It is 72mm in diameter so that is about an f/2.7 to f/2.8 lens. Thanks for doing this huge amount of work, and sharing your results! Could you please confirm your measured focal lengt...
by dmillard
Fri Oct 28, 2016 8:08 am
Forum: Photography Through the Microscope
Topic: Wandering Mestra egg
Replies: 11
Views: 860

Hello zzffnn, The adult butterfly in the image is actually nectaring on Gregg's Mistflower, Eupatorium greggii , but the eggs are laid on the underside of the leaves of various Tragia species. These are commonly called Noseburn because of their stinging trichomes, so handle with care! :wink: It's a ...
by dmillard
Fri Oct 28, 2016 3:43 am
Forum: Photography Through the Microscope
Topic: Wandering Mestra egg
Replies: 11
Views: 860

Thanks for your comments!

David
by dmillard
Thu Oct 27, 2016 3:43 pm
Forum: Photography Through the Microscope
Topic: Wandering Mestra egg
Replies: 11
Views: 860

Wandering Mestra egg

Although these butterflies are common in south Texas, they appear here every few years when their local hostplant, a species of Tragia , flourishes after a good summer rain. This is a quick stack of an egg at about 10X - I hope to collect some more while the weather is still warm. http://www.photoma...