Search found 397 matches

by The QCC
Sat Jun 13, 2015 12:49 am
Forum: Home-made microscope adaptations
Topic: 2Watt Capsule LED bulb W/G4 base Finally arrived
Replies: 9
Views: 3356

Re: 2Watt Capsule LED bulb W/G4 base Finally arrived

I tried doing something similar with a 6w version on the Labomed LB-592. I removed the halogen bulb and replaced it with the 6w LED. Two major problems. 1 - The LED lamp is round and only 1/3 of the LED's faced the condensing lens. 2 - 1/3 of the LED's do not emit enough light to do anything practic...
by The QCC
Fri Jun 12, 2015 2:05 am
Forum: Beginner's corner
Topic: A few questions about my new microscope
Replies: 23
Views: 4320

Re: A few questions about my new microscope

TNK: You have a nice scope. It looks as though there is a partial photo port on top. To mount your Canon camera on your microscope you may need a phototube for the microscope. If you can find a photo tube with a 25mm inside diameter, the most economical solution is the camera adapter with a built in...
by The QCC
Fri Jun 12, 2015 1:40 am
Forum: Microscopes and optics
Topic: Filar Micrometer
Replies: 4
Views: 2424

Re: Filar Micrometer

Or you can use a free software package with your calibration slide. The package is DigCam from Science 4 All It is simple to calibrate and use. Basically, you measure your calibration slide once for each objective. Then take your microscope photo and drag a line across the object to be measure. The ...
by The QCC
Thu Jun 11, 2015 12:20 am
Forum: About the website, the magazine and this forum
Topic: Magazine
Replies: 5
Views: 3525

Re: Magazine

The submissions link does not help much when the Editor does not respond to submissions.

The Editor may be busy with other occupations, but not responding to emails is a bit disheartening.
by The QCC
Wed Jun 10, 2015 9:47 pm
Forum: About the website, the magazine and this forum
Topic: Magazine
Replies: 5
Views: 3525

Re: Magazine

Nov-Dec is the latest issue.
by The QCC
Wed Jun 10, 2015 9:40 pm
Forum: Camera systems and imaging
Topic: Can you see the difference? Köhler illumination
Replies: 19
Views: 6815

Re: Can you see the difference? Köhler illumination

mrsonchus:

To accurately print what you see on the screen within the limits of your printer, calibrate your monitor with a hardware device like the Datacolor Spyder or the Xrite Colormunki.
Set your printer's colour management to sRGB and use a quality photo paper.

The above give satisfying results.
by The QCC
Wed Jun 10, 2015 9:28 pm
Forum: Microscopes and optics
Topic: What to buy? 'Realux' or Indian eBay mic?
Replies: 18
Views: 3661

Re: What to buy? 'Realux' or Indian eBay mic?

Are these Nikon Eclipse microscopes?
Made in China.
Made in China.
Nikon.jpg (29.53 KiB) Viewed 3589 times
by The QCC
Wed Jun 10, 2015 6:20 pm
Forum: Microscopes and optics
Topic: What to buy? 'Realux' or Indian eBay mic?
Replies: 18
Views: 3661

Re: What to buy? 'Realux' or Indian eBay mic?

SteveSteve I do not recommend buying from India if your shipping address is outside the Indian sub-continent. The quality of Indian microscopes is quite good, but the shipping containers are totally inadequate. I purchased a polarizing microscope from India via eBay. When the microscope arrived it w...
by The QCC
Wed Jun 10, 2015 3:17 pm
Forum: Microscopes and optics
Topic: LED Retrofit of my Laborlux 12
Replies: 39
Views: 8185

Re: LED Retrofit of my Laborlux 12

A very good idea.
This thread is deviating from the original topic.
by The QCC
Wed Jun 10, 2015 1:00 am
Forum: Microscopes and optics
Topic: LED Retrofit of my Laborlux 12
Replies: 39
Views: 8185

Re: LED Retrofit of my Laborlux 12

I used both high power LED (20W) and 100w halogen lighting and do not use filters on either light source. My camera capture programme does all the colour balancing. I may be the exception, but I do not use the eyepieces on the microscopes. All viewing is done on the calibrated display through the Ca...
by The QCC
Mon Jun 08, 2015 8:10 pm
Forum: Camera systems and imaging
Topic: Image quality of AmScope microscope via the trinocular tube
Replies: 131
Views: 33382

Re: Image quality of AmScope microscope via the trinocular tube

I cannot disagree with apochronaut on the historical use of the field aperture to achieve even illumination. The field aperture, if present, plays a large role in contrast and resolution with low power objectives. The proper use of the field aperture with low power obj. is to stop down the condenser...
by The QCC
Mon Jun 08, 2015 2:55 pm
Forum: About the website, the magazine and this forum
Topic: Illuminator repair, halogen lamp
Replies: 15
Views: 7211

Re: Illuminator repair, halogen lamp

Your microscope is quite expensive and it may be worth buying somethione like this for spare parts.
Fisher AMG MicroMaster Lab Stereoscopic Inverted Phase Optical Microscope PARTS

Have you tried contacting a distributor such as Fisher Scientific
by The QCC
Sat Jun 06, 2015 4:52 pm
Forum: Pictures and Videos
Topic: Gabbro revisited.
Replies: 1
Views: 702

Gabbro revisited.

A different camera and a different photo eyepiece. The specimen is a thin section of Gabbro, a common oceanic mineral The camera is a Canon 5D MkII and the photo eyepiece is a Meiji 2.5x. Post processing by Adobe Lightroom and RedRex web builder. Right click the photo and open in a new window. Gabbr...
by The QCC
Tue Jun 02, 2015 10:42 am
Forum: Camera systems and imaging
Topic: Can you see the difference? Köhler illumination
Replies: 19
Views: 6815

Re: Can you see the difference? Köhler illumination

For what it is worth, the difference I can see is also seen and printed by my HP DJ 130PS printer. P.S. In the colour world ICC profiles are not a minefield, but a godsend to consistent colour. As stated earlier, my monitors are calibrated to the AdobeRGB colour space and my printer and papers are p...
by The QCC
Tue Jun 02, 2015 2:46 am
Forum: Introduce yourself
Topic: new boy
Replies: 29
Views: 6180

Re: new boy

Very good suggestion. If possible.
Another case of eBay "You get what you see".
Another item Bally796 will have to fix is the voltage for the lamp .
The microscope's power supply is 110V
“LOVELY CONDITION GEM MICROSCOPE. UNABLE TO TEST AS 120V.”
by The QCC
Tue Jun 02, 2015 2:38 am
Forum: Camera systems and imaging
Topic: Can you see the difference? Köhler illumination
Replies: 19
Views: 6815

Re: Can you see the difference? Köhler illumination

Oh well, that's life the Internet world of colour.
The difference in quite noticeable in an A-B comparison in FireFox, Internet Explorer and Chrome on all three of my displays.
by The QCC
Tue Jun 02, 2015 2:20 am
Forum: Introduce yourself
Topic: new boy
Replies: 29
Views: 6180

Re: new boy

From the original listing.
This is the sale of a rare classic VINTAGE GEM INSTRUMENTS GEMOLITE MK 5 DIAMOND MICROSCOPE BAUSCH & LOMB TO RESTORE.
Bally796 may not have questioned "to retore"
by The QCC
Tue Jun 02, 2015 2:03 am
Forum: Introduce yourself
Topic: new boy
Replies: 29
Views: 6180

Re: new boy

If what you describe as the zoom mechanism, Bally796 has a bigger problem than just "replacing" the part that holds the objective.
by The QCC
Tue Jun 02, 2015 1:44 am
Forum: Introduce yourself
Topic: new boy
Replies: 29
Views: 6180

Re: new boy

I will take your word on this particular scope, but on my old OMAX the assembly rotates the the 2x and 4x objectives into position.
by The QCC
Tue Jun 02, 2015 12:50 am
Forum: Introduce yourself
Topic: new boy
Replies: 29
Views: 6180

Re: new boy

What I call a turret. Will not be easy to replace.
Turret.jpg
Turret.jpg (30.96 KiB) Viewed 5976 times
by The QCC
Tue Jun 02, 2015 12:23 am
Forum: Introduce yourself
Topic: new boy
Replies: 29
Views: 6180

Re: new boy

A lens turret?
by The QCC
Tue Jun 02, 2015 12:22 am
Forum: Camera systems and imaging
Topic: Can you see the difference? Köhler illumination
Replies: 19
Views: 6815

Re: Can you see the difference? Köhler illumination

If you cannot see the difference between the two large images I have to assume you are not using a monitor calibrated to the sRGB colour space. My display is factory calibrated to show 95% of the AdobeRGB colour space, but I assign the sRGB profile to the photos for this forum. There are distinct di...
by The QCC
Mon Jun 01, 2015 9:02 pm
Forum: Camera systems and imaging
Topic: Can you see the difference? Köhler illumination
Replies: 19
Views: 6815

Re: Can you see the difference? Köhler illumination

Did you look at the large images? Right click on the small images to open the large image in separate browser window.
by The QCC
Mon Jun 01, 2015 2:32 pm
Forum: Camera systems and imaging
Topic: Can you see the difference? Köhler illumination
Replies: 19
Views: 6815

Can you see the difference? Köhler illumination

The links below are to two large photos of Nepheline Syenite as observed through a 10x objective and crossed polars. Photo 1 has the field iris set to wide open and the condenser aperture stopped down to obtain maximum contrast and resolution. A basic scenario for microscopes without a field iris. N...
by The QCC
Mon Jun 01, 2015 12:00 am
Forum: Camera systems and imaging
Topic: Image quality of AmScope microscope via the trinocular tube
Replies: 131
Views: 33382

Re: Image quality of AmScope microscope via the trinocular tube

With apologies to Astyanax: I do not recommend purchasing a used microscope from an eBay seller. It is a rare seller that offers free return shipping for defective products and an ever more rare seller that will accept returns because the buyer was not happy with the product. If buying on-line I hig...
by The QCC
Sun May 31, 2015 1:18 pm
Forum: Home-made microscope adaptations
Topic: My Rock Crusher:
Replies: 2
Views: 2031

Re: My Rock Crusher:

Rodney:

Please detail the parts source for the cup and piston.

The object in the lower right side needs explaining. Can I use my head instead of ...
by The QCC
Sun May 31, 2015 11:23 am
Forum: Miscellaneous
Topic: Desk Heigth
Replies: 12
Views: 3936

Re: Desk Heigth

When using my very tall Labomed microscope I sit on a drafting chair. The chair can rise substantially higher than a standard office chair.
Drafting chair
Drafting chair
s0381926_sc7.jpg (14.48 KiB) Viewed 3865 times
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by The QCC
Sun May 31, 2015 11:06 am
Forum: Camera systems and imaging
Topic: Image quality of AmScope microscope via the trinocular tube
Replies: 131
Views: 33382

Re: Image quality of AmScope microscope via the trinocular tube

I cannot say or demonstrate Kohler illumination better than this presentation.

Kohler illumination setup
by The QCC
Sun May 31, 2015 2:32 am
Forum: Camera systems and imaging
Topic: Image quality of AmScope microscope via the trinocular tube
Replies: 131
Views: 33382

Re: Image quality of AmScope microscope via the trinocular tube

As I mentioned above, the Amscope microscope has a flip out condenser lens and a field iris. How to set your microscope up for Koehler illumination. For your 10x obj. and above, open the condenser and LED field iris fully. Focus your image. Stop down the LED fields iris Adjust the condenser height u...
by The QCC
Sat May 30, 2015 11:41 pm
Forum: Home-made microscope adaptations
Topic: Experimentations with high powered LEDs for microscope illumination
Replies: 122
Views: 26538

Re: Experimentations with high powered LEDs for microscope illumination

No the effect shows up in stills and videos. The blind effect starts around half power, disappears and the reappears near maximum power. The effect almost looks like it is beating with sub harmonic of the Canon camera's frame rate. I do not know if non-Canon cameras have the same issues with high po...