Author Topic: Damned tiny components, old eyes.  (Read 4290 times)

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Online jpanhalt

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Re: Damned tiny components, old eyes.
« Reply #25 on: September 13, 2021, 08:04:07 pm »
Is an optivisor that much different from x2 or x3 reading glasses?
You must consider the difference between "diopter" and magnification ("X").  (Diopter/4 + 1) = magnification
 

Offline jmelson

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Re: Damned tiny components, old eyes.
« Reply #26 on: September 13, 2021, 08:37:13 pm »
If I am doing moderately small work for a long time, I use the visor.  It has "wedge" built into the lenses to ease the "crossed eyes" effect.
But, for any really fine work, I have an Olympus stereo zoom microscope at home, and a Chinese version of it at work.  I got the one with the dual-beam base that makes it more stable.  I do soldering and rework on 0.65, 0.5 and even 0.4mm lead pitch flat pack parts.
I have made my own ring lights that fit up around the side of the microscope to give me the greatest possible room for my hands and tools.
Jon
 

Offline thm_w

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Re: Damned tiny components, old eyes.
« Reply #27 on: September 13, 2021, 09:20:19 pm »
I got a amscope, but never got any good use of it. Always right eye that comes out blurry. Switched the lenses,  and still right eye blurry. Always in the end of the range when it come to adjust it clear. It's a strange thing, using på right eye on the left side of the scope, it's clear with both lenses!  Must be a fault in the Amscope itself.
If I get down to my lab , I will take some photos.

Why wouldn't you have contacted amscope about the issue.. clearly its not supposed to be blurry.

I assume you know how to adjust the focus
https://www.microscopeworld.com/p-3359-how-to-adjust-focusing-microscope-eyepieces.aspx
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Offline ErikTheNorwegianTopic starter

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Re: Damned tiny components, old eyes.
« Reply #28 on: September 13, 2021, 09:57:23 pm »
I got a amscope, but never got any good use of it. Always right eye that comes out blurry. Switched the lenses,  and still right eye blurry. Always in the end of the range when it come to adjust it clear. It's a strange thing, using på right eye on the left side of the scope, it's clear with both lenses!  Must be a fault in the Amscope itself.
If I get down to my lab , I will take some photos.

Why wouldn't you have contacted amscope about the issue.. clearly its not supposed to be blurry.

I assume you know how to adjust the focus
https://www.microscopeworld.com/p-3359-how-to-adjust-focusing-microscope-eyepieces.aspx

The scope came, and i went away, to a hospital for a spinal surgery (4 prolapses) that went horribly wrong. Now after i had a blood cancer (Polecytemia vera) "run" as added bonus of bad health, i finaly after 10 years, 36 times in hospital and parapledic, in a wheelchair can finaly clear out my lab and start over.
Its been a strugle.

I looked at the scope tonight. There is clearly somthing wrong with the houseing av the eypieces. The eypices themself are identical, but they are diffrently allined when mounted, so whatever i do, i cant get both in focus at the same time at the same distance. Will get some help tommorow to lift it of its base (I cant lift it out myself) so i can check it out. I had it writen off, as a bad investment. But maybe it can be saved.

« Last Edit: September 13, 2021, 10:37:19 pm by ErikTheNorwegian »
/Erik
Goooood karma is flowing..
 
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Offline YetAnotherTechie

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Re: Damned tiny components, old eyes.
« Reply #29 on: September 14, 2021, 03:59:12 am »
In some microscopes only one lens is adjustable for different eye diopters, so you need to put the fixed one in focus and adjust the adjustable eyepiece  for the other eye.
 

Offline jfiresto

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Re: Damned tiny components, old eyes.
« Reply #30 on: September 14, 2021, 05:00:28 am »
... I looked at the scope tonight. There is clearly something wrong with the housing av[?] the eyepieces. The eyepieces ... are identical, but ... differently aligned when mounted.... I can't get both in focus at the same time at the same distance....
What Amscope model is it? If you do not know, could you post a side view of the head that shows the eyepieces and eyepiece tubes? Different microscopes have different ways of getting sharp, stereo images.
-John
 

Offline DeanA

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Re: Damned tiny components, old eyes.
« Reply #31 on: September 14, 2021, 08:29:35 am »
I got a amscope, but never got any good use of it. Always right eye that comes out blurry. Switched the lenses,  and still right eye blurry. Always in the end of the range when it come to adjust it clear. It's a strange thing, using på right eye on the left side of the scope, it's clear with both lenses!  Must be a fault in the Amscope itself.
If I get down to my lab , I will take some photos.

Why wouldn't you have contacted amscope about the issue.. clearly its not supposed to be blurry.

I assume you know how to adjust the focus
https://www.microscopeworld.com/p-3359-how-to-adjust-focusing-microscope-eyepieces.aspx
I've had an Amscope for a while, I think same or similar to this one https://amscope.com/collections/stereo-microscope/products/zm-4tn3 but I've never been able to get it to stay in focus across the different zoom levels (have to refocus after change zoom levels) is that normal or am I doing something wrong?

Offline jfiresto

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Re: Damned tiny components, old eyes.
« Reply #32 on: September 14, 2021, 09:26:03 am »
Have you tried the usual procedure to make the microscope parfocal?

From the microscope manual for the Meiji Techno EMZ, an original that Amscope may have copied:

Quote
It is necessary to adjust, so focus remains sharp through the whole range of zoom magnification and so that the image is seen equally sharply focused in both right and left-hand eyepieces.

(1) Set microscope magnification to the highest power 4.5X by turning the zoom control knob counter- clockwise.

(2) Then focus sharply on the specimen.

(3) Set to the lowest magnification by turning the zoom control knob clockwise. Do not touch the focusing controls.

(4) Looking with the right eye through the right-hand eyepiece, turn the eyepiece’s dioper adjustment ring until the image is precisely in focus.

(5) Do the same with the left eye and left-hand eyepiece.

(6) The fused microscope image should now be uniformly sharp throughout the zoom range and without refocusing.
-John
 
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Offline DeanA

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Re: Damned tiny components, old eyes.
« Reply #33 on: September 14, 2021, 09:52:09 am »
Have you tried the usual procedure to make the microscope parfocal?

From the microscope manual for the Meiji Techno EMZ, an original that Amscope may have copied:

Quote
It is necessary to adjust, so focus remains sharp through the whole range of zoom magnification and so that the image is seen equally sharply focused in both right and left-hand eyepieces.

(1) Set microscope magnification to the highest power 4.5X by turning the zoom control knob counter- clockwise.

(2) Then focus sharply on the specimen.

(3) Set to the lowest magnification by turning the zoom control knob clockwise. Do not touch the focusing controls.

(4) Looking with the right eye through the right-hand eyepiece, turn the eyepiece’s dioper adjustment ring until the image is precisely in focus.

(5) Do the same with the left eye and left-hand eyepiece.

(6) The fused microscope image should now be uniformly sharp throughout the zoom range and without refocusing.

Yes, thanks, I've tried all that.

Online rsjsouza

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Re: Damned tiny components, old eyes.
« Reply #34 on: September 14, 2021, 09:58:32 am »
Erik, I saw you mentioned that you refrain from using products from china, but I must say that both the Amscope and the small head mounted loupe are excellent products that help me immensely.

The Amscope took me a bit of time adapting to it, but I had to properly adjust its oculars: first, close the right eye and put the object in focus with the normal focus control, then close the left eye and adjust the small ocular to rule out any eye differences. It has seen most use for inspections and large soldering jobs on boards. The model is SM-1TS-V203 and I show it in this video (in portuguese only, sorry).

The loupe has been seeing more action lately due to my work on radio chassis and in the attic. Although it is not as light as my dad's old loupe, it has great cushion, us adjustable and allows combining two lenses for extra magnification. The kit comes with a wide selection of very thick acrylic lenses (glass would have been even heavier). This loupe also has three LEDs powered by three AAA batteries. Although I thought it could have been a gimmicky feature at first, it has helped me immensely in illuminating the work I am doing at a given time, especially because the light focus can be positioned independently from the head position. The model itself is unknown but the description to this video has the store that I bought it.

Good luck in your search!
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 
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Offline thm_w

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Re: Damned tiny components, old eyes.
« Reply #35 on: September 14, 2021, 09:10:47 pm »
If its been sitting for 10 years untouched, in an area that gets damp, could be some kind of mold growth inside the lenses.

I've had an Amscope for a while, I think same or similar to this one https://amscope.com/collections/stereo-microscope/products/zm-4tn3 but I've never been able to get it to stay in focus across the different zoom levels (have to refocus after change zoom levels) is that normal or am I doing something wrong?

Normal, since you didn't specifically buy a parfocal head: https://amscope.com/products/zmdg6745t
« Last Edit: September 15, 2021, 09:48:12 pm by thm_w »
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Offline jfiresto

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Re: Damned tiny components, old eyes.
« Reply #36 on: September 15, 2021, 07:57:32 am »
As in, normal with Amscope? I do not think I have used a fully functional, stereo microscope made in the last few decades that could not be made parfocal.
-John
 
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Offline thinkfat

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Re: Damned tiny components, old eyes.
« Reply #37 on: September 15, 2021, 08:10:24 am »
As in, normal with Amscope? I do not think I have used a fully functional, stereo microscope made in the last few decades that could not be made parfocal.

Seems to me, too. I didn't explicitly buy a parfocal head, but still I can make it stay in focus over the whole zoom range.

Works similar to this, this just deals with fixed-focus objectives, but it applies obviously also to stepless zoom heads.
https://www.microscopeworld.com/p-3359-how-to-adjust-focusing-microscope-eyepieces.aspx
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Offline thm_w

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Re: Damned tiny components, old eyes.
« Reply #38 on: September 15, 2021, 09:51:31 pm »
OK I lied, I tried it with the Amscope at work which is not stated as parfocal head and was able to hold focus.
Going to try with my cheap Amscope at home and see if it can do the same.

Odd that the one linked specifically stated "excellent Parfocality". Maybe its harder to achieve on higher magnification units?
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Offline jfiresto

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Re: Damned tiny components, old eyes.
« Reply #39 on: September 16, 2021, 07:04:54 am »
Perhaps not in this world, but in the profitable world of marketing. ;)

Just for fun, I listed and grouped Amscope's list of features, and struck-through and lightened the fluff, redundancy and exaggeration:

    Both Ocular-Tubes with Adjustable Diopter

    All Metal Mechanical Components

    Rubber Eyeguards Included

    Manufactured under ISO 9001 Quality Control Standard

    Excellent Five (5) Year Manufacturer Warranty


    6.7X-45X Continuous Zoom
Magnification Offering Top-Level Quality Images & Parfocality

    45-degree Inclined Trinocular Head with Extreme Widefield High-Eyepoint Eyepieces

    30mm Extreme Widefield WH10X/22 Eyepieces

    Large Working Distance (4" (100mm) at all magnifications!)


    High Resolution with Great Flatness and Contrast

    Sharp Stereo Erect Images over a Wide Field View

    Crystal Clear Original True Color Images

    Accurate Alignment Ensuring a Fatigue-Free Viewing

    Full Optical Glass Elements

    Precise Ground Glass Lens

    Adjustable Interpupillary Distance

Most of the bullets do not survive unscathed.
« Last Edit: September 16, 2021, 07:06:44 am by jfiresto »
-John
 
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Offline thinkfat

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Re: Damned tiny components, old eyes.
« Reply #40 on: September 16, 2021, 07:27:34 am »
Constant working distance over the full zoom range actually requires parfocality, that's not just redundant blurb.
Everybody likes gadgets. Until they try to make them.
 


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