Search found 18352 matches

by rjlittlefield
Tue Jul 20, 2021 1:40 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: DMap intermediate output - ZS
Replies: 3
Views: 110

Re: DMap intermediate output - ZS

Caching of DMap intermediate results was recently added to the beta, has not yet propagated to the full release. From https://zerenesystems.com/cms/stacker/softwaredownloads/currentbeta : DMap speedup: Options > Preferences > DMap Settings: “Cache DMap pass 1 info for faster work with multiple thres...
by rjlittlefield
Mon Jul 19, 2021 9:40 am
Forum: Equipment Discussions
Topic: Coverslip thickness
Replies: 3
Views: 123

Re: Coverslip thickness

Dennis, see the discussion at viewtopic.php?p=198514#198514 and in the surrounding thread.

--Rik
by rjlittlefield
Sat Jul 17, 2021 8:47 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: June Beetle eyes have a smoothly curved surface
Replies: 9
Views: 309

Re: June Beetle eyes have a smoothly curved surface

Thanks for the feedback, guys! I'm glad to hear that the stereo works for other people also. This figure from Nilsson’s text suggests nocturnal beetles may have a rather smooth cornea exterior surface. A feature of a “superposition” eye. This makes sense from an optical standpoint, since in a superp...
by rjlittlefield
Sat Jul 17, 2021 8:24 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 180mm ED Nikkor 2.8 as tube lens?
Replies: 12
Views: 198

Re: 180mm ED Nikkor 2.8 as tube lens?

Lou Jost wrote:
Sat Jul 17, 2021 7:25 pm
I do use the 180 ED (non-IF), which has a great reputation especially in astrophotography. I think I have included it in one of my past tube lens tests on this forum, but I don't know where it is.
viewtopic.php?p=228350#p228350 ?

--Rik
by rjlittlefield
Sat Jul 17, 2021 8:20 pm
Forum: Equipment Discussions
Topic: Looking for a new monitor
Replies: 10
Views: 295

Re: Looking for a new monitor

Are you particularly attached to the concept of one monitor? I've become very fond of my two-monitor setup, each 4K, so giving me a total space of 7680 x 2160.

--Rik
by rjlittlefield
Sat Jul 17, 2021 4:52 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Virginia Creeper Leafhoppers -- Erythroneura ziczac
Replies: 2
Views: 179

Re: Virginia Creeper Leafhoppers -- Erythroneura ziczac

Thanks, Mark. The game continues. Here is a photo from today, just before spraying again. In a single frame, I see one large nymph, two medium, two small, and some more eggs left to hatch. I think I'm losing. https://janrik.net/MiscSubj/2021/GrapeLeafhoppers_20210703/IMG_9917_small.jpg MP-E 65 on Ca...
by rjlittlefield
Sat Jul 17, 2021 3:12 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 180mm ED Nikkor 2.8 as tube lens?
Replies: 12
Views: 198

Re: 180mm ED Nikkor 2.8 as tube lens?

I fully agree that the Mitutoyo M Plan Apo objectives are better than anything else in their price bracket. But they are definitely pricey. They are also relatively fragile so used units must be purchased with return rights and careful testing immediately after delivery. I do not know anybody who re...
by rjlittlefield
Sat Jul 17, 2021 2:32 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 180mm ED Nikkor 2.8 as tube lens?
Replies: 12
Views: 198

Re: 180mm ED Nikkor 2.8 as tube lens?

With the Z7 in full frame mode, the Nikkor may introduce some vignetting. I do not know that lens in particular, but in general Nikon long lenses seem more vulnerable than Canon to vignetting when used with microscope objectives. If it does occur, then switching to a Raynox DCR-150 as tube lens will...
by rjlittlefield
Thu Jul 15, 2021 3:14 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: When end mills go bad
Replies: 2
Views: 90

Re: When end mills go bad

That's painful to see. It looks like that second one is missing a couple of teeth also, in addition to having lots of junk stuck on what's left.

--Rik
by rjlittlefield
Wed Jul 14, 2021 5:48 pm
Forum: Nature Photography -- Macro and Close-up
Topic: My local dragonflies
Replies: 6
Views: 207

Re: My local dragonflies

The second one is lovely -- great capture of a surprising aspect of the life of this damselfly!

--Rik
by rjlittlefield
Wed Jul 14, 2021 5:34 pm
Forum: Equipment Discussions
Topic: Need a permanent setup!
Replies: 26
Views: 562

Re: Need a permanent setup!

Couldn’t find anything else that was even remotely close to what I was thinking. I thought maybe someone here would have some guidance based on those pics. At this site, a good place to start is with the FAQ: Example macro rigs . That links to a couple of other threads, which are themselves full of...
by rjlittlefield
Tue Jul 13, 2021 7:11 pm
Forum: Equipment Discussions
Topic: Need a permanent setup!
Replies: 26
Views: 562

Re: Need a permanent setup!

Nate, welcome aboard! Can you say a few more words about what you're looking to improve about this project, and where you might like to go after this? The reason for that question is that there are a lot of things that could help with your current project, but they come with different costs and diff...
by rjlittlefield
Mon Jul 12, 2021 2:40 pm
Forum: Photography Through the Microscope
Topic: Lasius niger - Black Garden Ant pupa and cocoons
Replies: 3
Views: 120

Re: Lasius niger - Black Garden Ant pupa and cocoons

Ah yes, the naked mole rat! A very interesting creature in its own right (https://en.wikipedia.org/wiki/Naked_mole-rat). Also an innocent participant in one of the most audacious scientific April Fools Day pranks ever played: The Hot Headed Naked Ice Borer . Most of the links in that article have ro...
by rjlittlefield
Mon Jul 12, 2021 10:14 am
Forum: Photography Through the Microscope
Topic: Lasius niger - Black Garden Ant pupa and cocoons
Replies: 3
Views: 120

Re: Lasius niger - Black Garden Ant pupa and cocoons

Nice pictures, great info! I had nearly forgotten this "haplodiploidy" system of reproduction, which I now read is used throughout the Hymenoptera. Wikipedia has more to say about it, at https://en.wikipedia.org/wiki/Hymenoptera#Sex_determination and in the article linked there, https://en.wikipedia...
by rjlittlefield
Sun Jul 11, 2021 8:40 pm
Forum: Equipment Discussions
Topic: Bondic® is NOT A GLUE, says the manufacturer
Replies: 20
Views: 576

Re: Bondic® is NOT A GLUE, says the manufacturer

I ran another test today, trying to imagine how this leaf cast technique might be used in the field. So, in late afternoon I approached my garden with a pair of scissors, a microscope slide, and a tube of Bondic without the LED. I cut a small section of rhubarb leaf, avoiding major veins. Then, work...