Search found 160 matches

by c-krebs
Tue Jul 19, 2016 6:29 pm
Forum: Pictures and Videos
Topic: 5 stereo. Crab larva, Geranium robertianum,aphid... more
Replies: 24
Views: 2581

Re: 5 stereo. Crab larva, Geranium robertianum,aphid... more

Once you start to see the effect you have to go with it. Exactly! Relax at that point! I mentioned with the first stereo image I posted (bee hamuli) that I realize it seems this is not doable for some people. I have some other stereos that are pretty cool as well, but I guess I'll stick more to the...
by c-krebs
Tue Jul 19, 2016 12:36 am
Forum: Pictures and Videos
Topic: 5 stereo. Crab larva, Geranium robertianum,aphid... more
Replies: 24
Views: 2581

Re: 5 stereo. Crab larva, Geranium robertianum,aphid... more

Another method to try... Center your head to the image on the screen (about 25-30" away). Hold your index finger up vertically in front of you toward the screen, and in line with the center line between the stereo pair. Focus on your finger, and gradually move it towards your nose. While you do this...
by c-krebs
Mon Jul 18, 2016 7:02 pm
Forum: Pictures and Videos
Topic: 5 stereo. Crab larva, Geranium robertianum,aphid... more
Replies: 24
Views: 2581

5 stereo. Crab larva, Geranium robertianum,aphid... more

Here are five "synthetic stereo" (cross-eyed pairs) made using Zerene Stacker. Again, apologies to those who cannot see the stereo effect... I've deliberately selected ones where the 2-D images are still interesting to see, so hopefully you can still enjoy them. The images in this selection images a...
by c-krebs
Mon Jul 18, 2016 5:46 pm
Forum: Pictures and Videos
Topic: Okinawa Star Sand and Zerene Stacker
Replies: 8
Views: 1079

Re: Okinawa Star Sand and Zerene Stacker

Kurt, Nice. I think you will have a lot of fun "stacking". What a great subject. A couple of thought on stereo from Zerene. You need to play around with the "shift" amounts. Stacks with more images and shallower DOF often yield a more pronounced stereo effect. Fairly often the image pairs will have ...
by c-krebs
Mon Jul 18, 2016 5:31 pm
Forum: Pictures and Videos
Topic: Fly eye Two...
Replies: 13
Views: 1252

Re: Fly eye Two...

This is really nice.

The lighting is excellent and you "stopped" the stack at a good point which provides the nice non-distracting background
by c-krebs
Mon Jul 18, 2016 7:13 am
Forum: Pictures and Videos
Topic: Botany Sections in DIC
Replies: 37
Views: 2336

Re: Botany Sections in DIC

Looking good!
The second and third are a real treat. You and John make a good combo.
by c-krebs
Mon Jul 18, 2016 7:10 am
Forum: Pictures and Videos
Topic: Extrémité larve de moustique
Replies: 10
Views: 946

Re: Extrémité larve de moustique

These are excellent! Beautiful work.
by c-krebs
Mon Jul 18, 2016 7:08 am
Forum: Pictures and Videos
Topic: Botryococcus in glycerine
Replies: 6
Views: 795

Re: Botryococcus in glycerine

It is a beautiful image. I like the light quality, and as gekko said there really is detail in there. Just out of curiously I plopped it into Photoshop and tried a "Smart Sharpen", radius 0.7, to about 250%. It still maintained that smooth soft lighting look but the low-contrast detail really looked...
by c-krebs
Mon Jul 18, 2016 6:53 am
Forum: Pictures and Videos
Topic: Mayfly Nymph
Replies: 14
Views: 2226

Re: Mayfly Nymph

Tom,

Looks great! Really nice job with the lighting, panning, exposure... all well done.
by c-krebs
Mon Jul 18, 2016 6:45 am
Forum: Pictures and Videos
Topic: Phase Contrast Diatoms
Replies: 22
Views: 2261

Re: Phase Contrast Diatoms

Rod,

These are really good.
I'm a little surprised at how nice these small diatoms look with 100X phase.
by c-krebs
Sun Jul 17, 2016 1:07 am
Forum: Pictures and Videos
Topic: Hamuli
Replies: 14
Views: 1399

Re: Hamuli

Kort, Not sure I understand your procedure. It should go like this.... 1) Load the image stack 2) in Preferences, check the stereo/rocking box and select the number of images and the shifts desired 3) Go to "Stack" and run stacking using your desired method (Pmax, Dmap or both) The program will then...
by c-krebs
Sun Jul 17, 2016 12:14 am
Forum: Pictures and Videos
Topic: Hamuli
Replies: 14
Views: 1399

Re: Hamuli

I love stereo images too, always great fun to see. Charles, I finally downloaded the Zerene free trial (and so far just love it!), but it doesn't seem to let me make stereo pairs. Wonder if it's unavailable on the trial version? I don't know for sure, but I am fairly certain that it would. Look und...
by c-krebs
Sat Jul 16, 2016 8:55 pm
Forum: Pictures and Videos
Topic: Hamuli
Replies: 14
Views: 1399

Hamuli

Something of a follow-up to "bee knee" pictures, here is another specialized and quite interesting physical feature found in bees, wasps and other Hymenoptera. In Hymnoptera both the front and rear wings beat in unison. In flight the front and hind wings of a bee are held together by a row of tiny h...
by c-krebs
Sat Jul 16, 2016 7:46 pm
Forum: Pictures and Videos
Topic: The knee of a bee!
Replies: 15
Views: 1601

Re: The knee of a bee!

Thanks to all for the kind remarks (and again for the warm welcome here).
Rodney wrote:Fossil records of insects dating back multiple millions of years old can be looked at and studied.
This reminded me of some other images that might be of interest, I'll "dig" them up.
by c-krebs
Sat Jul 16, 2016 4:28 am
Forum: Microscopes and optics
Topic: LED Controller Test
Replies: 12
Views: 2083

Re: LED Controller Test

I believe overheating shortens the lifespan considerably of supposedly semi-immortal LEDs, so have fingers crossed. Is the aluminum post that the LED is attached to a solid piece? You are running it at a bit over 6 watts if you max the potentiometer out to 2100Ma, well under the max rating. Chances...
by c-krebs
Sat Jul 16, 2016 2:30 am
Forum: Microscopes and optics
Topic: LED Controller Test
Replies: 12
Views: 2083

Re: LED Controller Test

Nice implementation. I really like the various LUXdrive LED drivers. They have been very reliable and simple to set-up.

Do you think you will have adequate heat sinking and ventilation?
by c-krebs
Sat Jul 16, 2016 1:55 am
Forum: Pictures and Videos
Topic: The knee of a bee!
Replies: 15
Views: 1601

The knee of a bee!

The specialization of insect legs is a great subject for photomicrography. The honeybee's legs are highly specialized. Here you can see the pollen combs which collect pollen from the middle legs and abdomen. The stiff bristles ("pecten" or "rake") at the bottom of the tibia collects the pollen from ...
by c-krebs
Sat Jul 16, 2016 1:16 am
Forum: Digital processing
Topic: Zerene VS Photoshop - a stacking experiment
Replies: 21
Views: 12663

Re: Zerene VS Photoshop - a stacking experiment

Here are the result straight out of Helicon Focus. They have three methods... A, B, and C. "C" is a pyramid contrast method and gives a result that looks just like Zerene Pmax, so I did not upload it. "A" and "B" have two settings that can vary the results considerably. Here I used the "default" set...
by c-krebs
Fri Jul 15, 2016 4:17 am
Forum: Digital processing
Topic: Zerene VS Photoshop - a stacking experiment
Replies: 21
Views: 12663

Re: Zerene VS Photoshop - a stacking experiment

Johann, I downloaded your source files and had a look. Some thoughts... Try Zerene again, Dmap. Set preferences... shift X on , Shift Y on , brightness on . Be certain that brightness is checked. Don't use any "auto" value for the threshold setting in preferences. When, halfway through the stack, th...
by c-krebs
Tue Jul 12, 2016 9:25 pm
Forum: Microscopes and optics
Topic: America Optical infinity optics
Replies: 19
Views: 3556

Re: America Optical infinity optics

apochronaut, Ultimately I suppose, what matters is the results you actually get. Which to me means if you have the bits and pieces go ahead and try it and see what happens... nothing to lose really. Where it is nice to know how the manufacturers did their optical trickery is when you are considering...
by c-krebs
Tue Jul 12, 2016 8:03 am
Forum: Beginner's corner
Topic: First photos
Replies: 11
Views: 2716

Re: First photos

Yup, a good start. Your white balance for the first two photos looked pretty good. These last two darkfield look as if the color balance was set wrong. (But obviously I didn't see the actual subject). You can usually color balance pretty well after taking the picture when the the image out of the ca...
by c-krebs
Tue Jul 12, 2016 12:29 am
Forum: Microscopes and optics
Topic: America Optical infinity optics
Replies: 19
Views: 3556

Re: America Optical infinity optics

I had been under the impression that current Zeiss and Leica infinity objectives used chromatically corrective tube lenses. But I did not recall where I had seen this. A quick search found some references that seem pretty solid, but none are "from the horses mouth" (Leica). I could never suggest one...
by c-krebs
Mon Jul 11, 2016 11:12 pm
Forum: Pictures and Videos
Topic: Structural color
Replies: 13
Views: 1082

Re: Structural color

Charles, so what are we looking at and with what obj. and lighting? ... Fill us in on the details. The first two are of a jewel beetle carapace, Chrysochroa buqueti. The third is a butterfly wing, Blue-rayed Metalmark (Lyropteryx apollonia). The forth and fifth are wingscales of a Chrysiridia rhiph...
by c-krebs
Mon Jul 11, 2016 8:45 pm
Forum: Pictures and Videos
Topic: Structural color
Replies: 13
Views: 1082

Structural color

One of the subjects that has always fascinated me through the microscope is the observance of "structural" color. Most of the color we see in everyday subjects is due to pigments of some type that absorb and reflect certain wavelengths of light. But there are some dramatic natural (and man-made) col...
by c-krebs
Mon Jul 11, 2016 6:59 pm
Forum: Microscopes and optics
Topic: America Optical infinity optics
Replies: 19
Views: 3556

Re: America Optical infinity optics

Using 45mm Reichert objectives on an AO infinity stand, originally designed for 34mm objectives presents little problem. The 10/20 series has a rather long dovetail guide, for the stage, so it can be dropped 11 mm easily. This might cause a small problem getting certain condensers in and out but I ...
by c-krebs
Mon Jul 11, 2016 7:17 am
Forum: Microscopy accessories
Topic: Carson universal smartphone optics adopter
Replies: 2
Views: 1482

Re: Carson universal smartphone optics adopter

Hopefully it will fit your phone and your eyepiece and thus make your life much easier. Don't use your 25X eyepieces for this, stick with the 10X/
by c-krebs
Mon Jul 11, 2016 6:52 am
Forum: Beginner's corner
Topic: First photos
Replies: 11
Views: 2716

Re: First photos

This is a Desmid, a type of green algae. It belongs to the genus Closterium. There are many species and quite a few with this long thin shape. If you just got your first microscope yesterday, and these are your first two photographs I would certainly say...WELL DONE! - how better photo quality can I...
by c-krebs
Mon Jul 11, 2016 2:59 am
Forum: Pictures and Videos
Topic: Springtails; Collembola.
Replies: 3
Views: 466

Re: Springtails; Collembola.

These little guys almost look like little cartoon characters. And, as you mention, they are in constant motion. Might be worthwhile to have a small electronic flash ready to go for such occasions. What "hardware" did you use?
by c-krebs
Mon Jul 11, 2016 2:55 am
Forum: Pictures and Videos
Topic: Tardigrade and his Pharynx!
Replies: 19
Views: 1199

Re: Tardigrade and his Pharynx!

These are very good images of a tough subject. They are usually constantly squirming around and they are pretty 3-dimensional so it is normally difficult to get a good composition with adequate depth-of-field. I also noticed what looked like the shell of one...do they shed? Yes they do. And it is pr...
by c-krebs
Mon Jul 11, 2016 2:25 am
Forum: Pictures and Videos
Topic: 2 Vorticella + alga
Replies: 16
Views: 838

Re: 2 Vorticella + alga

Very nice shot and very nice use of oblique light. I am seeing some good examples of oblique light in the forum. I've often thought it has been one of the most underutilized but yet effective lighting methods. At one point Olympus, Lomo, (and I suspect others) made condensers specifically to make us...