Search found 600 matches

by dmillard
Tue Aug 28, 2018 10:51 am
Forum: Equipment Discussions
Topic: (LSA || DCR150 || ITL200) ? FF : CROP
Replies: 58
Views: 5517

I'd like to reinforce what Jorgen said about focal length vs format size. If you are happy with a given objective on a tube lens of focal length 200mm on APS, you will get exactly that same image, with same corner quality, filling the FF sensor if you use change to a tube lens of 300mm. I am using ...
by dmillard
Sat Aug 11, 2018 11:41 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Scotch Thistle
Replies: 5
Views: 1253

Really nice images!
by dmillard
Thu Aug 09, 2018 7:55 am
Forum: Equipment Discussions
Topic: Tube Lens Test With MITUTOYO 5X M Plan APO
Replies: 66
Views: 9640

I hope this question doesn't take the thread off topic, if it does I'll gladly start a new thread. It should be an easy one to answer by those more versed in tube lenses than I: is image circle affected by the tube lens or is it dictated by the objective? From my experience, it's affected by both. ...
by dmillard
Wed Aug 08, 2018 6:46 pm
Forum: Equipment Discussions
Topic: Tube Lens Test With MITUTOYO 5X M Plan APO
Replies: 66
Views: 9640

That little lens continues to amaze. I've finished up shooting two big tests that I haven't published yet. 17 lenses at 2.1x and 8 lenses (5 lenses and 3 objectives) at 3x. Can you guess the top lens in each of those? It took a NA0.20 objective to beat the Minolta, it beat a Nikon Objective and was...
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: 9640

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: 3575

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: 1511

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: 1511

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: 1919

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: 7618

Beautiful image!
by dmillard
Tue Nov 01, 2016 6:32 am
Forum: Equipment Discussions
Topic: very long working distance macro
Replies: 15
Views: 2986

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: 1639

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: 867

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