Search found 1186 matches

by Greg Howald
Thu May 19, 2022 10:57 pm
Forum: Introduce yourself
Topic: Greetings from Brisbane (Australia).
Replies: 1
Views: 1198

Re: Greetings from Brisbane (Australia).

Welcome. There are a small number of mineralogical enthusiasts on the forum. I do a good deal of it myself.
by Greg Howald
Thu May 19, 2022 10:53 pm
Forum: Identification help
Topic: Nematode and Friends
Replies: 1
Views: 904

Re: Nematode and Friends

I think those are eggs
by Greg Howald
Thu May 19, 2022 10:46 pm
Forum: Identification help
Topic: tiny glass house
Replies: 5
Views: 1860

Re: tiny glass house

It's a good photo. Thanks for sharing.
by Greg Howald
Thu May 19, 2022 10:45 pm
Forum: Pictures and Videos
Topic: a growing seed
Replies: 1
Views: 703

Re: a growing seed

I do lots of plants. I've never been bored with it. There's so much I don't understand. You put a seeding in the ground. It begins to grow, but directly under it is a large stone. The roots will grow down to about two inches from the stone, then turn sideways to avoid it. How did it know the stone w...
by Greg Howald
Thu May 19, 2022 10:39 pm
Forum: Introduce yourself
Topic: Hi
Replies: 1
Views: 899

Re: Hi

Welcome!
by Greg Howald
Thu May 19, 2022 10:37 pm
Forum: My microscope
Topic: New Toy 2!
Replies: 31
Views: 5672

Re: New Toy 2!

Depending upon the voltage required. You have true control at a max of 3.7 volts and 3 watts. But at 7 volts and 5 watts, the light is dimly on as soon as you turn it on. So I wouldn't say that at 5 watts you have total control but there is no flicker unless voltage is set too high, over- driving th...
by Greg Howald
Thu May 19, 2022 10:14 pm
Forum: Pictures and Videos
Topic: Little Nothings
Replies: 3
Views: 927

Re: Little Nothings

Thought from such things has been debated for some time with no real solution. Some regard reaction to stimuli as thought. Others certainly don't. So, here we go!
by Greg Howald
Thu May 19, 2022 10:10 pm
Forum: My microscope
Topic: New Toy 2!
Replies: 31
Views: 5672

Re: New Toy 2!

Your equipment if far better than mine. I have a power block, a pvm, and a lamp.
by Greg Howald
Thu May 19, 2022 8:41 pm
Forum: Illumination Techniques
Topic: oblique illumination
Replies: 44
Views: 9429

Re: oblique illumination

Agreed. Not cost effective to continue when easier ways to obtain oblique lighting were developed. But the condenser seems to have adjustment to control the degree of obliqueness or to change the light path. The only way I can do that is with two filters, one being able to be rotated on the C axis. ...
by Greg Howald
Thu May 19, 2022 8:29 pm
Forum: My microscope
Topic: New Toy 2!
Replies: 31
Views: 5672

Re: New Toy 2!

I use pvms from Amazon, a power block and leds.. it comes out very stable and I have no problems. And you are right Phil. 20 watt halogen is usually insufficient for all the different filters we put in the light path.
by Greg Howald
Thu May 19, 2022 7:10 pm
Forum: Pictures and Videos
Topic: LeafPictures
Replies: 3
Views: 666

Re: LeafPictures

Cool images Don. Welcome back. You have been missed.
by Greg Howald
Thu May 19, 2022 7:09 pm
Forum: My microscope
Topic: New Toy 2!
Replies: 31
Views: 5672

Re: New Toy 2!

I converted my B660 from halogen to 5 watt led yesterday and am well pleased. It runs on 7.0 volts dc. I just don't like the yellow from halogen when you reduce intensity of illumination. But that's just me. I also use Pepsodent Toothpaste cause you'll wonder where the yellow went.
by Greg Howald
Thu May 19, 2022 3:50 pm
Forum: My microscope
Topic: New Toy 2!
Replies: 31
Views: 5672

Re: New Toy 2!

Good image Louise . Looks like it has a slider on the photo tube which can be a good thing. Since it is infinite, I could make adaptors for 30mm eyepieces without affecting magnification. Thanks for the post. I'll keep watching to decide whether or not to buy one 🤔
by Greg Howald
Thu May 19, 2022 2:41 am
Forum: For forum members who want to buy and sell equipment
Topic: WTB/ barrow 30mm Centering telescope lens
Replies: 8
Views: 2150

Re: WTB/ barrow 30mm Centering telescope lens

Use a ten x, 23mm eyepiece inside the tube and expand it to put the 30x in the end of the outer sliding tube.
by Greg Howald
Thu May 19, 2022 2:39 am
Forum: For forum members who want to buy and sell equipment
Topic: WTB/ barrow 30mm Centering telescope lens
Replies: 8
Views: 2150

Re: WTB/ barrow 30mm Centering telescope lens

I made a sliding tube for this using an empty paper towel role and a good amount of scotcth tape. I admit it wasnt pretty but It actually worked quite well and was focusable.
by Greg Howald
Thu May 19, 2022 2:36 am
Forum: Microscopes and optics
Topic: Objectives with a Concave front element.
Replies: 14
Views: 2651

Re: Objectives with a Concave front element.

I must say your collection is quite impressive. It's obvious that you have been gathering them for some time. Such designs were wonders in their time, and represent steps in the evolution of optics. I know little about these objectives but I want to thank you for sharing. Some one here with vastly m...
by Greg Howald
Wed May 18, 2022 4:09 pm
Forum: Microscopes and optics
Topic: Will an infinity scope minus its tube lens work with 160mm optics
Replies: 12
Views: 2940

Re: Will an infinity scope minus its tube lens work with 160mm optics

Mt finite objectives will work with my infinite scopes at higher magnifications above 10x. Quality of image suffers a bit. But my infinite objectives will not focus in my finite scopes at all.
by Greg Howald
Wed May 18, 2022 12:04 am
Forum: My microscope
Topic: New Toy!
Replies: 32
Views: 5682

Re: New Toy!

I'm excited for you. New stuff always brings renewed innovation and ideas. I've had my 720q for about a month now and an still making accessories for it. My brother says that if you stop learning or stop trying, you begin to die.
by Greg Howald
Tue May 17, 2022 11:36 pm
Forum: Beginner's corner
Topic: keeping specimens alive
Replies: 2
Views: 1001

Re: keeping specimens alive

Add a few drop of milk and some cooked grains of rice to the water. Put the vessel containing specimens in a window sill, but not in full sun. They need light to prosper. A few living plants and mud from the place you got the specimens will also help. You will find microbes living in the mud and the...
by Greg Howald
Tue May 17, 2022 11:15 pm
Forum: Pictures and Videos
Topic: Coleps feasting on a rotifer egg
Replies: 6
Views: 1590

Re: Coleps feasting on a rotifer egg

Wow Wes. You did a good job with that.
by Greg Howald
Tue May 17, 2022 4:21 pm
Forum: My microscope
Topic: New Toy!
Replies: 32
Views: 5682

Re: New Toy!

:P Well, , let me know about it. I don't have one and you have peaked my interest. Greg
by Greg Howald
Tue May 17, 2022 2:19 pm
Forum: Identification help
Topic: Is this fungal?
Replies: 1
Views: 612

Re: Is this fungal?

Not a fungal expert but if those are connecting strands one would think it is fungal. I've seen similar items in pond water.
by Greg Howald
Mon May 16, 2022 9:44 pm
Forum: Pictures and Videos
Topic: Stentor Coeruleus
Replies: 3
Views: 813

Re: Stentor Coeruleus

Your video isn't shared. When I click on it I get a message saying it is private.
by Greg Howald
Mon May 16, 2022 9:42 pm
Forum: Camera systems and imaging
Topic: DSLR camera or special-purpose microscope cameras?
Replies: 11
Views: 2969

Re: DSLR camera or special-purpose microscope cameras?

The mirrorless cameras are newly out. I hear they are very popular.
by Greg Howald
Mon May 16, 2022 9:40 pm
Forum: My microscope
Topic: New Toy!
Replies: 32
Views: 5682

Re: New Toy!

:lol: :lol: :lol: :lol: Greg
by Greg Howald
Mon May 16, 2022 9:15 pm
Forum: Beginner's corner
Topic: Erecting bino heads
Replies: 4
Views: 1128

Re: Erecting bino heads

Of course it's possible. But there may be some trade offs involved. There may be a reduction of perceived light intensity at the eyepiece. Magnification may be increased due to extra light path length. But it should be possible to do in an experimental environment simply by adding an additional lens...
by Greg Howald
Mon May 16, 2022 9:05 pm
Forum: Pictures and Videos
Topic: unidentified critter in fresh water pond
Replies: 4
Views: 976

Re: unidentified critter in fresh water pond

That's a really good find and a really good shot!
Greg
by Greg Howald
Mon May 16, 2022 9:04 pm
Forum: My microscope
Topic: New Toy!
Replies: 32
Views: 5682

Re: New Toy!

You keep it up and you can be really proud of the ingenuity you've put into it. But, alas,,, it still won't plug the coffee pot in come morning. :lol: