Search found 7593 matches

by 75RR
Sun Jul 12, 2015 2:19 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Did not seem too long. Did find it Very useful. Thanks Did you see the 6V update on the previous post? My previous comment on a 8V cutout were based on the Tungsten Bulb, LED will not however work on the Nominal 4V. Note: I find the 6V setting is enough. 8V, 10V and 12V settings are too bright. It i...
by 75RR
Sun Jul 12, 2015 11:50 am
Forum: Pictures and Videos
Topic: First Pics!
Replies: 10
Views: 2117

Re: First Pics!

Congratulations on your first posted images.
Looks like you may have Scenedesmus in the first and second images, though I can not distinguish the spines.
These are very hard to photograph due to their very small size.
Beastie in the last image is a mystery to me.
by 75RR
Sun Jul 12, 2015 10:59 am
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Hi Crater Eddie, I have been looking at some voltage figures, do they make sense to you? Can you run a similar test? All Tests run from lowest Dimmer setting to highest. Nominal 6V setting on Power Supply IN Range 7.7V - 7.31V OUT Range 1.79V - 3.38V OUT Range (Incl. Resistor) 1.92V - 2.78V Current ...
by 75RR
Sat Jul 11, 2015 10:33 pm
Forum: Microscopes and optics
Topic: Lux meter + Kodak cameras and even a Toupcam
Replies: 35
Views: 6882

Re: Lux meter

Since my old light meter is being so elusive, I may purchase one like this on my next buying cycle... http://www.ebay.com/itm/201135677970?ssPageName=STRK%3AMEBIDX%3AIT&fromMakeTrack=true If you are in the USA you may want to get it from here: http://www.amazon.com/Docooler-Digital-Luxmeter-Luminom...
by 75RR
Sat Jul 11, 2015 10:30 pm
Forum: Microscopes and optics
Topic: Lux meter + Kodak cameras and even a Toupcam
Replies: 35
Views: 6882

Re: Lux meter

If mine works and if you find yours it would be interesting to compare Candela.
by 75RR
Sat Jul 11, 2015 9:52 pm
Forum: Microscopes and optics
Topic: Lux meter + Kodak cameras and even a Toupcam
Replies: 35
Views: 6882

Lux meter + Kodak cameras and even a Toupcam

What with my queries/fears on whether my Tungsten bulb would lose lumen in the transition from AC to DC, and the possibility that the PWM Dimmer would also get in on the act and knock a few more off for fun, I decided to go for a Lux meter. Old, and at least second hand, still if it is accurate I th...
by 75RR
Sat Jul 11, 2015 7:06 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Yep, Looks like you have a good setup there...
Thanks. Would like to tidy it up a bit at some point. Maybe put everything in a box.
by 75RR
Sat Jul 11, 2015 7:04 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

billbillt wrote:The 8V cutoff limit makes sense... The device is rated at 9V - 60DC...
That is for input. Output goes all the way down to 0
by 75RR
Sat Jul 11, 2015 6:53 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Well, connected it all up and it works. :) Photo 1: Power Supply, Dimmer and Resistor. Photo 2: LED heat sinks, both Tungsten Bulb and LED elements are on the same plane to allow köhler. Photo 3: Lower crenelated edge of focused element on Front Focal Plane (offset so it can be seen) Image reflected...
by 75RR
Sat Jul 11, 2015 12:44 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Update: Still fiddling with the Tungsten bulb. Dimmer does not work bellow 8V. Dimmer dial has a definite "off click" when turned completely to the left (cuts current off completely), internal off/on switch set towards dimmer dial. Can't remember now if you said that was normal or reversed . Just ch...
by 75RR
Sat Jul 11, 2015 3:55 am
Forum: Pictures and Videos
Topic: Arcella +
Replies: 12
Views: 1765

Re: Arcella +

Thanks JimT
That is similar to what my "Amoeba Maybe" looked like but it was only ~25um's. Didn't expect one that small.

Never seen one that small. Not sure if there are any of that size.
This one at 70µm is the smallest I have seen so far.
by 75RR
Sat Jul 11, 2015 3:13 am
Forum: Introduce yourself
Topic: Completely Green
Replies: 1
Views: 1302

Re: Completely Green

Welcome houstontx, congratulations on a very nice microscope. Looking forward to seeing some photographs of your microscope in the My microscope section and of course some of what you have seen through it. ... it had a round body, with two spiked spinning discs above its head? Sounds like it could b...
by 75RR
Fri Jul 10, 2015 11:11 pm
Forum: Pictures and Videos
Topic: Arcella +
Replies: 12
Views: 1765

Arcella +

25x/0,60 Neofluar* 1.6, 70µm, Brightfield/Oblique + Phase, 9 and 4 image stacks in Photoshop

Image
Image
by 75RR
Fri Jul 10, 2015 10:29 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Longer off cycles mean the LED is less bright... More on cycles the brighter it is.. So it is effectively lowering the top of the illumination range? Thought DC already had that effect vs AC with incandescent bulbs. How much illumination have I lost and is this going to shorten the life of my incan...
by 75RR
Fri Jul 10, 2015 8:21 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 25522

Re: Experimentations with high powered LEDs for microscope illumination

Well, just goes to show. Despite low expectations, now and again one gets a nice surprise. The dimmer arrived today! This is an image of it connected to the Tungsten 12v 60W bulb using DC from the power supply. http://i1368.photobucket.com/albums/ag171/mapologo/Power-Supply_zps9ctc1npw.jpg Visually ...
by 75RR
Fri Jul 10, 2015 7:45 pm
Forum: Pictures and Videos
Topic: Ostracods
Replies: 11
Views: 2662

Re: Ostracods

Nice detail on the first image. Re: linking images. Once you have copied the Direct link in Photobucket (top right corner of page once you have opened the image you want to link), click on the Img button in the Toolbar and paste the copied link in between the two [img] brackets. ... does that mean t...
by 75RR
Thu Jul 09, 2015 11:57 am
Forum: Introduce yourself
Topic: New microscope person from Berkeley, CA, USA
Replies: 30
Views: 7974

Re: New microscope person from Berkeley, CA, USA

Wow!! That's some setup, but far beyond my need or capabilities or budget, I'm afraid. Pity. That arrangement is a particularly fancy one, I showed it because it has a parts labeled diagram which is useful. Something to keep in mind if you ever come across a cheap DSLR. Main components are Camera, ...
by 75RR
Thu Jul 09, 2015 4:52 am
Forum: Introduce yourself
Topic: New microscope person from Berkeley, CA, USA
Replies: 30
Views: 7974

Re: New microscope person from Berkeley, CA, USA

Welcome.
So, what's best for 10-150x or so --- dissecting scope or a USB hand-held "digital microscope"?
There is a third way:
http://www.photomacrography.net/forum/v ... php?t=8247
by 75RR
Thu Jul 09, 2015 3:38 am
Forum: Pictures and Videos
Topic: Can't Post Pictures Anymore!!!
Replies: 13
Views: 2646

Re: Can't Post Pictures Anymore!!!

So does this mean no more pictures from a person that has reached the photo limit?
When you reach the limit you can still post pictures but you have to do it via a link to an image site such as Photobucket.
by 75RR
Thu Jul 09, 2015 2:34 am
Forum: Pictures and Videos
Topic: Can't Post Pictures Anymore!!!
Replies: 13
Views: 2646

Re: Can't Post Pictures Anymore!!!

... I posted them on 500PX and copied them to this site ...
When you say copied, I take it that you mean you copied and then pasted the direct link from 500PX?
I use Photobucket, it is free and so far at least, it is working. I use an Add-blocker so it is relatively painless.
by 75RR
Wed Jul 08, 2015 7:44 pm
Forum: Pictures and Videos
Topic: bacteria in turkey scat
Replies: 8
Views: 1498

Re: bacteria in turkey scat

What I get is closer to time lapse photography than video ... So do I and I let the video load first so it is not the internet connection. ... this is a still-hunt where you sit under a tree ... I believe that technically a still-hunt involves a tree-stand, alcohol and at least one of you has to fa...
by 75RR
Wed Jul 08, 2015 7:34 pm
Forum: Pictures and Videos
Topic: Alga in Brightfield/Phase + Oblique Test
Replies: 18
Views: 2801

Re: Alga in Brightfield/Phase + Oblique Test

In AO's literature , they pointed out that the different phase systems, had specific applications. I see what you mean about the different views each one provides. Agree the division of the dividing bacillus is visible in B-Minus and Bright M, yet not in Dark M. I can also see the dots on the lower...
by 75RR
Wed Jul 08, 2015 4:00 pm
Forum: Pictures and Videos
Topic: Alga in Brightfield/Phase + Oblique Test
Replies: 18
Views: 2801

Re: Alga in Brightfield/Phase + Oblique Test

Thanks for the additional info apochronaut. AO truly went whole hog on Phase. The type most often offered appear to be a dark medium contrast version, by most companies. If that includes Zeiss then fortunately dark medium does appear to be the best of the 3 you have shown! There would appear to be a...
by 75RR
Wed Jul 08, 2015 12:47 am
Forum: Microscopes and optics
Topic: 40x Objectives Comparison
Replies: 40
Views: 7058

Re: 40x Objectives Comparison

The seller said the microscope worked good the best they could tell. Be very careful of any seller that claims that. Always ask about returning defective items before you buy. I have that deal with my seller, though he doesn't actually give money back, he does eventually come up with a replacement ...
by 75RR
Tue Jul 07, 2015 10:37 pm
Forum: Pictures and Videos
Topic: Diatomée
Replies: 5
Views: 1222

Re: Diatomée

Very nice. Interesting Diatom. Looked them up, it seems they make some very long chains.
by 75RR
Tue Jul 07, 2015 1:47 am
Forum: Pictures and Videos
Topic: A loricate peritrich
Replies: 8
Views: 1664

Re: A loricate peritrich

Nice find! Did you video it as well?
Last but not least, are you using pastels for the drawing?
by 75RR
Mon Jul 06, 2015 10:17 pm
Forum: Microscopes and optics
Topic: 40x Objectives Comparison
Replies: 40
Views: 7058

Re: 40x Objectives Comparison

Actually, I think the crud was water-soluble dried up salt of some sort. Oil or grease would have required a different solvent...
That or maybe I should stop drinking the water. ;)
by 75RR
Mon Jul 06, 2015 6:33 pm
Forum: Pictures and Videos
Topic: Nauplius larve de copépode
Replies: 8
Views: 1243

Re: Nauplius larve de copépode

These are excellent. Well done.
by 75RR
Mon Jul 06, 2015 6:33 pm
Forum: Pictures and Videos
Topic: Scenedesmus
Replies: 8
Views: 1757

Re: Scenedesmus

Nice. Do like Scenedesmus.
by 75RR
Mon Jul 06, 2015 6:14 pm
Forum: Pictures and Videos
Topic: Alga in Brightfield/Phase + Oblique Test
Replies: 18
Views: 2801

Re: Alga in Brightfield/Phase + Oblique Test

Not at all. Most instructive.