Search found 458 matches

by DonSchaeffer
Fri Aug 07, 2020 5:08 pm
Forum: Microscopes and optics
Topic: Fine Focus Slips
Replies: 2
Views: 90

Re: Fine Focus Slips

Thanks Gerard. My microscope has separate fine and course focus knobs. I contacted the dealer (Amscope) and they told me to toghten by turning the fina and course knobs in opposite directions. I tried that and it seems to have worked more or less.
by DonSchaeffer
Thu Aug 06, 2020 7:39 pm
Forum: Pictures and Videos
Topic: Parts of a Queen Anne's Lace Flower
Replies: 0
Views: 27

Parts of a Queen Anne's Lace Flower

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queenanne5save.jpg
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queenannekeep.jpg
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by DonSchaeffer
Wed Aug 05, 2020 9:04 pm
Forum: Pictures and Videos
Topic: Microscopic shellfish or...??
Replies: 10
Views: 130

Re: Microscopic shellfish or...??

I wish I knew. Spectacular images.
by DonSchaeffer
Wed Aug 05, 2020 1:02 am
Forum: Pictures and Videos
Topic: Spiral shaped bacteriae
Replies: 5
Views: 95

Re: Spiral shaped bacteriae

Interesting and complicated image--well shot.
by DonSchaeffer
Tue Aug 04, 2020 3:14 pm
Forum: Pictures and Videos
Topic: The Tomato Blossom
Replies: 0
Views: 30

The Tomato Blossom

An appreciation tour of the humble tomato flower
https://www.youtube.com/watch?v=bxJOiRK1vNQ
by DonSchaeffer
Tue Aug 04, 2020 12:52 am
Forum: Illumination Techniques
Topic: Rheinberg illumination experiment
Replies: 6
Views: 160

Re: Rheinberg illumination experiment

Microscopes are not like magnifying glasses. They work on the basis of interference patterns that break the white light into color bands. They fail to resolve images when the interference patterns are not present. I think the color consequences on microscopic images are unpredictable. There doesn't ...
by DonSchaeffer
Tue Aug 04, 2020 12:47 am
Forum: Pictures and Videos
Topic: Inside a Wild Grain Seed
Replies: 2
Views: 69

Re: Inside a Wild Grain Seed

Thanks KD
by DonSchaeffer
Sun Aug 02, 2020 3:30 pm
Forum: Microscopes and optics
Topic: Fine Focus Slips
Replies: 2
Views: 90

Fine Focus Slips

My fine focus knob is proving hard to use. Often I achieve good focus with the rough adjustment then use the fine adjustment to refine focus further or to focus in and out and the entire focus slips. How does one tighten the fine focus?

I have an Amscope M100 mono lens with separate fine focus knobs.
by DonSchaeffer
Sat Aug 01, 2020 8:27 pm
Forum: Pictures and Videos
Topic: Pollen of a Weed Flower
Replies: 2
Views: 77

Re: Pollen of a Weed Flower

wow! That's impressive.
by DonSchaeffer
Sat Aug 01, 2020 8:26 pm
Forum: Pictures and Videos
Topic: The Cucumber's Defensive Bloom
Replies: 0
Views: 46

The Cucumber's Defensive Bloom

The cucumber's large yellow flower has many tubes and spikes. It looks like a high-tech device under the microscope.
https://www.youtube.com/watch?v=OnqEGJuHrhg
by DonSchaeffer
Sat Aug 01, 2020 7:03 pm
Forum: Pictures and Videos
Topic: The Art in a Weed
Replies: 2
Views: 99

Re: The Art in a Weed

Thanks Perry. I have just learned how to use the microscope that way.
by DonSchaeffer
Sat Aug 01, 2020 11:31 am
Forum: Identification help
Topic: Is this a bedbug
Replies: 4
Views: 184

Re: Is this a bedbug

by DonSchaeffer
Sat Aug 01, 2020 12:51 am
Forum: Pictures and Videos
Topic: Ruined Water Sample
Replies: 8
Views: 243

Re: Ruined Water Sample

I've been making cultures out handfuls of dry grass (grass long sitting on the ground). I have had some cultures where all the microbes died out quickly, but this time it seems to be working. They microbes are living in the grass. I did an experiment to check that. It's here http://www.microbehunter...
by DonSchaeffer
Sat Aug 01, 2020 12:46 am
Forum: Pictures and Videos
Topic: The Tiny Flower and Its Leaf
Replies: 0
Views: 35

The Tiny Flower and Its Leaf

The tiniest flower is so articulate, I can explore for hours.
https://www.youtube.com/watch?v=vrKwxLesQiU
by DonSchaeffer
Fri Jul 31, 2020 4:52 pm
Forum: Illumination Techniques
Topic: Fiber-Optic Cable to Specifically Direct Light
Replies: 3
Views: 100

Re: Fiber-Optic Cable to Specifically Direct Light

In actual fact, I have a feeling that microscopes don't much like up-stage lighting. My microscope seems to respond better--make better use of light that passes through the condenser. I modified my use of the fiber-optic cable to pass it through the condenser via the side of the filter holder. Now i...
by DonSchaeffer
Fri Jul 31, 2020 4:44 pm
Forum: Pictures and Videos
Topic: Video of a rotifer egg hatching
Replies: 7
Views: 129

Re: Video of a rotifer egg hatching

I learned a lot from this.
by DonSchaeffer
Thu Jul 30, 2020 11:53 pm
Forum: Pictures and Videos
Topic: The Art in a Weed
Replies: 2
Views: 99

The Art in a Weed

There is a lot to see if you look really really close.
https://www.youtube.com/watch?v=ecenD7nC4-4
by DonSchaeffer
Thu Jul 30, 2020 10:02 pm
Forum: Pictures and Videos
Topic: Pollen of a Weed Flower
Replies: 2
Views: 77

Pollen of a Weed Flower

Small, thin yellow petals are just covered with pollen grains. The grains appear spherical with tiny bumps and imperfections (40x and 60x objectives).
detailsofapollengrain.jpg
detailsofapollengrain.jpg (201.42 KiB) Viewed 77 times
pollenofaweedflower.jpg
pollenofaweedflower.jpg (146.81 KiB) Viewed 77 times
weedflowerpollen.jpg
weedflowerpollen.jpg (131.65 KiB) Viewed 77 times
by DonSchaeffer
Wed Jul 29, 2020 10:30 pm
Forum: Illumination Techniques
Topic: Fiber-Optic Cable to Specifically Direct Light
Replies: 3
Views: 100

Re: Fiber-Optic Cable to Specifically Direct Light

Thanks Michael. I still can't use it with the higher powered objectives. The lenses block the light beam.
by DonSchaeffer
Wed Jul 29, 2020 10:21 pm
Forum: Illumination Techniques
Topic: Fiber-Optic Cable to Specifically Direct Light
Replies: 3
Views: 100

Fiber-Optic Cable to Specifically Direct Light

Since I bought my microscope, I've been trying out stop filters, means of making shadows, and being able to see opaque subjects. I bought some fiber optic cable which finally arrived today. Now I'm working on the mechanics of creating a system (with no resources except pieces of plastic and tape). I...
by DonSchaeffer
Wed Jul 29, 2020 1:59 pm
Forum: Pictures and Videos
Topic: Three Ameobas
Replies: 3
Views: 103

Re: Three Ameobas

Thanks KD
by DonSchaeffer
Tue Jul 28, 2020 10:30 pm
Forum: Pictures and Videos
Topic: The Texture of a Flower Petal
Replies: 0
Views: 50

The Texture of a Flower Petal

I dressed it up like a painting.
textureinflowerpetalfamed.jpg
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by DonSchaeffer
Tue Jul 28, 2020 9:12 pm
Forum: Illumination Techniques
Topic: Controlling the Light
Replies: 2
Views: 84

Re: Controlling the Light

It saves me from having to use those block filters.
by DonSchaeffer
Tue Jul 28, 2020 7:47 pm
Forum: Pictures and Videos
Topic: Bacteria, Biofilm, and Cysts
Replies: 0
Views: 52

Bacteria, Biofilm, and Cysts

A biofilm forms after a time. Protozoans feed at the fringes but those who get caught in it may become cysts which may eventually get buried in it. The biofilm begins to look like a kind of archeological dig.
buriedcircles.jpg
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cystsandmicrobe.jpg
cystsandmicrobe.jpg (229.42 KiB) Viewed 52 times
thebeach.jpg
thebeach.jpg (247.49 KiB) Viewed 52 times
by DonSchaeffer
Tue Jul 28, 2020 7:39 pm
Forum: Illumination Techniques
Topic: Controlling the Light
Replies: 2
Views: 84

Controlling the Light

All of us are using a variety of technics to control the light to improve definition and make our images more interesting. I am using a small USB powered flashlight that acts as a stop filter and a source of adjustable substage light. I also bought (in the dollar store) a set of ting LED lights I'm ...
by DonSchaeffer
Tue Jul 28, 2020 6:56 pm
Forum: Pictures and Videos
Topic: Bring Back Microbes from Dry Grass
Replies: 0
Views: 51

Bring Back Microbes from Dry Grass

To observe microorganisms I have been collecting dry grass and letting it infuse in water for a few days. Lo and behold rotifers, ciliates, and even ameobas appear. I wanted to see how the dry grass holds these creatures. I took a measure of dry grass, put it on a microscope slide and added a drop o...
by DonSchaeffer
Mon Jul 27, 2020 9:15 pm
Forum: Pictures and Videos
Topic: Three Ameobas
Replies: 3
Views: 103

Three Ameobas

My old grass culture yielded something I never saw before.
https://www.youtube.com/watch?v=o7mQldiFCwM
by DonSchaeffer
Mon Jul 27, 2020 7:44 pm
Forum: Pictures and Videos
Topic: Rotatoria Collotheca sp.
Replies: 10
Views: 242

Re: Rotatoria Collotheca sp.

Beautifully lit. How did you do that?