Inexpensive USB 2.0 camera test with two microscope types
Re: Inexpensive USB 2.0 camera test with two microscope types
Hi Doron,
your USB camera does really well and I'm sure you will have fun with it. For web resolution and documentary work the very best camera solutions are a massive overkill and much of their capability doesn't show. On your GFL the USB cam does astonishingly well in web resolution but I'm sure that your Canon would win by far when critical obects at high resolutions were the task. But only with you stage micrometer pictures this slowly starts to show. A very good result for this relatively inexpensive camera.
I have more than one microscope and I'm quite happy with my portable camera solutions with Pentax Q and Nikon 1J5 because I can use them on the very microscope I use at this moment.
Can you post a link to where you bought the camera so anybody who needs one can buy the good one right away?
This evening I played with something completely different: A Zeiss Photomikroskop I with built in 35mm camera! In 1955 it was the first electronically controlled camera of the world, not pocketable though . The film transport is spring powered.
Bob
your USB camera does really well and I'm sure you will have fun with it. For web resolution and documentary work the very best camera solutions are a massive overkill and much of their capability doesn't show. On your GFL the USB cam does astonishingly well in web resolution but I'm sure that your Canon would win by far when critical obects at high resolutions were the task. But only with you stage micrometer pictures this slowly starts to show. A very good result for this relatively inexpensive camera.
I have more than one microscope and I'm quite happy with my portable camera solutions with Pentax Q and Nikon 1J5 because I can use them on the very microscope I use at this moment.
Can you post a link to where you bought the camera so anybody who needs one can buy the good one right away?
This evening I played with something completely different: A Zeiss Photomikroskop I with built in 35mm camera! In 1955 it was the first electronically controlled camera of the world, not pocketable though . The film transport is spring powered.
Bob
Re: Inexpensive USB 2.0 camera test with two microscope types
Camera vendor: https://www.ebay.com/itm/5MP-USB-CMOS-C ... 2749.l2649microBob wrote:...
But if there is a dead pixel - I take no responsibility...
You play with a Photomicroskop and a 35mm film camera ? and process the film and print on paper ?? wow! how fortunate I am to enjoy photography without film !
Re: Inexpensive USB 2.0 camera test
Thanks for the link - I will read it.MichaelG. wrote:Having suffered my fair share of dusty sensors ... I would say it's more likely that you have a dead pixel there.Hobbyst46 wrote:3. There is at least one fixed alien black dot on all photos (e.g. circled in red in photo no.4). This dot originates from the camera, not the scope. I cleaned the lens thoroughly, but the dot stays. Perhaps it is dust on the sensor
Comments are welcome.
... Could you let us see a crop of that small region please ?
MichaelG.
.
.
P.S. I was looking at this earlier today:
https://www.lmscope.com/en/Stereomikros ... on_en.html
The suggestion of tilting the specimen, for single camera use on a Greenough, seems very logical.
In the meantime, I am afraid that your diagnosis of the black dot is correct, anyway here are two slightly different crops of it:
Oops - these came out tiny! what do it do to make them full size pictures ?
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- suspected dead pixel.jpg (1.07 KiB) Viewed 11537 times
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- same suspected dead pixel.jpg (810 Bytes) Viewed 11537 times
Re: Inexpensive USB 2.0 camera test
Open the full image in Photoshop [or another editor] and zoom to 'actual pixels'Hobbyst46 wrote:In the meantime, I am afraid that your diagnosis of the black dot is correct, anyway here are two slightly different crops of it:
Oops - these came out tiny! what do it do to make them full size pictures ?
... select say a 200x200 pixel area containing the region of interest and export that as a new image.
That should do it.
MichaelG.
.
Edit: for info. I have just copied the larger of your two crops and the posted version only appears to be 38x38 pixels.
Last edited by MichaelG. on Mon Feb 18, 2019 9:53 pm, edited 1 time in total.
Too many 'projects'
Re: Inexpensive USB 2.0 camera test
This is a 100X100 pixel regionMichaelG. wrote:Open the full image in Photoshop [or another editor] and zoom to 'actual pixels'Hobbyst46 wrote:In the meantime, I am afraid that your diagnosis of the black dot is correct, anyway here are two slightly different crops of it:
Oops - these came out tiny! what do it do to make them full size pictures ?
... select say a 200x200 pixel area containing the region of interest and export that as a new image.
That should do it.
MichaelG.
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- dot region.jpg (616 Bytes) Viewed 11534 times
Re: Inexpensive USB 2.0 camera test with two microscope types
Something is going amiss, here
Perhaps you could zoom-in and do a screen grab.
... or could you perhaps share the original image, and let me try ?
MichaelG.
Perhaps you could zoom-in and do a screen grab.
... or could you perhaps share the original image, and let me try ?
MichaelG.
Too many 'projects'
Re: Inexpensive USB 2.0 camera test with two microscope types
This is expansion and screen capture - is this OK?
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- suspected dead pixels.jpg (6.75 KiB) Viewed 11530 times
Re: Inexpensive USB 2.0 camera test with two microscope types
That's much better ... Thanks !!
What we need to ponder now, is what it represents
If it was a true, uncompressed image of one, or more, dead pixel[s] then each would be a hard-edged black block.
This image is [unsurprisingly] showing the result of 'processing' ... jpeg compression and maybe some interpolation.
Do you have any way of confirming the native resolution of the camera chip ?
... or, even better, of identifying the make & model.
For now ... it's time for me to 'sleep on it'
MichaelG.
.
Edit: I have just quickly checked the numbers, and am happy that the pixel size and pixel count are correct for a 5MP sensor of 1/2.5 dimensions.
... I will attempt to 'present my case' tomorrow.
What we need to ponder now, is what it represents
If it was a true, uncompressed image of one, or more, dead pixel[s] then each would be a hard-edged black block.
This image is [unsurprisingly] showing the result of 'processing' ... jpeg compression and maybe some interpolation.
Do you have any way of confirming the native resolution of the camera chip ?
... or, even better, of identifying the make & model.
For now ... it's time for me to 'sleep on it'
MichaelG.
.
Edit: I have just quickly checked the numbers, and am happy that the pixel size and pixel count are correct for a 5MP sensor of 1/2.5 dimensions.
... I will attempt to 'present my case' tomorrow.
Last edited by MichaelG. on Mon Feb 18, 2019 11:23 pm, edited 1 time in total.
Too many 'projects'
Re: Inexpensive USB 2.0 camera test with two microscope types
Looks awfully like dirt on the sensor to me. Have you used a hand lens 'puffer' or had a look at the sensor (or it's covering filter) perhaps under a stereo 'scope or even with a hand-lens?
With the lens/optics unscrewed the camera body will look like this - the tiny sensor is clearly visible and I suspect that a mote of dust may be stuck to it, giving you the problem... The optics should simply unscrew straight off of the front pf the camera, leaving the tiny sensor visible and easily reached if it needs a wipe or a puff of air from a hand 'puffer'. I personally would check this first.
If you suspect that it's dirt on the optics of the camera just loosen the screwed-in optics on the front of the camera body and turn it (the optics tube) a tiny bit relative to the camera's case. If the spot persists but is in a different position in the image the dirt is on the optics somewhere, if it stays in the same position it's on the sensor - easily removed in my experience of both a 2mp and a 5mp version of this camera that I have.
Your images really don't look like dead pixels to me, more like a dirt/dust particle...
John B.
With the lens/optics unscrewed the camera body will look like this - the tiny sensor is clearly visible and I suspect that a mote of dust may be stuck to it, giving you the problem... The optics should simply unscrew straight off of the front pf the camera, leaving the tiny sensor visible and easily reached if it needs a wipe or a puff of air from a hand 'puffer'. I personally would check this first.
If you suspect that it's dirt on the optics of the camera just loosen the screwed-in optics on the front of the camera body and turn it (the optics tube) a tiny bit relative to the camera's case. If the spot persists but is in a different position in the image the dirt is on the optics somewhere, if it stays in the same position it's on the sensor - easily removed in my experience of both a 2mp and a 5mp version of this camera that I have.
Your images really don't look like dead pixels to me, more like a dirt/dust particle...
John B.
John B
Re: Inexpensive USB 2.0 camera test with two microscope types
Bull's eye, John B.!mrsonchus wrote:Looks awfully like dirt on the sensor to me. Have you used a hand lens 'puffer' or had a look at the sensor (or it's covering filter) perhaps under a stereo 'scope or even with a hand-lens?...Your images really don't look like dead pixels to me, more like a dirt/dust particle...
So - finding the bug questMichaelG wrote:...
0. Puffed the front and back of the reducing lens (again!) - black dot persists.
1. Rotated the reducing lens relative to the camera - black dot persists.
2. Removed the reducing lens and inspected the camera - a few tiny dust(?) parts revealed. Puffed them away.
3. Black dot persists. A bug - dead pixel - in the camera?
4. There appears to be a filter, it is glued to the back side of a retaining thread ring. Luckily, although I do not have a pin spanner or compass, the retaining ring and attached filter were easy to unscrew, with a pointed-tip forceps. Took out the filter and puffed front and back on it.
5. Inspected the bare camera sensor chip through the stereoscope - looks nice and clean.
6. Puffed the chip without touching it, several times.
7. Reassembled the apparatus and back to the microscope.
Now what about the bug? Here is a real one (aphid) from a flower.
Black dot gone. So, it had been dust. Perhaps shaped as a pixel...
Thanks folks for the help!
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- Aphid on tissue paper, 15X.jpg (321.49 KiB) Viewed 11504 times
Re: Inexpensive USB 2.0 camera test with two microscope types
Great news!
It so often seems to be the simplest explanation that I always go to the basics first with the ever-recurring mystery-specks on the image problem!
Very recently I had the same problem (for the 1000th time!) and so went through the usual suspects - that time the dust particle was on the dratted mirror of my Orthoplan. I was able to reach it easily enough through the light-port and observe through the eyepieces as I removed it - but at first glance it was quite mysterious as all the other elements that I dutifully rotated, puffered, contemplated etc came up OK....
Great feeling when the swine's gone though! Almost worth having it there in the first place!
Nicely-done old chap.
John B.
It so often seems to be the simplest explanation that I always go to the basics first with the ever-recurring mystery-specks on the image problem!
Very recently I had the same problem (for the 1000th time!) and so went through the usual suspects - that time the dust particle was on the dratted mirror of my Orthoplan. I was able to reach it easily enough through the light-port and observe through the eyepieces as I removed it - but at first glance it was quite mysterious as all the other elements that I dutifully rotated, puffered, contemplated etc came up OK....
Great feeling when the swine's gone though! Almost worth having it there in the first place!
Nicely-done old chap.
John B.
John B
Re: Inexpensive USB 2.0 camera test with two microscope types
I stand corrected ... and remain impressed !!
MichaelG.
.
People who live on busy main roads need 'glove-boxes' for this sort of work
[one of the many projects on my list ]
MichaelG.
.
Last time I tried something similar ... all I acheived was to introduce more dust.So - finding the bug quest
People who live on busy main roads need 'glove-boxes' for this sort of work
[one of the many projects on my list ]
Last edited by MichaelG. on Tue Feb 19, 2019 1:09 pm, edited 1 time in total.
Too many 'projects'
Re: Inexpensive USB 2.0 camera test with two microscope types
In fact, that was collaborative thinking at its best! Thanks! All possibilties were considered. Bravo this forum.MichaelG. wrote:...
Re: Inexpensive USB 2.0 camera test with two microscope types
Hi all. I'm a newbie. Will this inexpensive camera properly attach to a "PARFOCAL C-MOUNT ADAPTER FOR Spencer, AO, American Optical TRINOCULAR MICROSCOPE"?
https://www.ebay.com/itm/PARFOCAL-C-MOU ... 2749.l2648
Thanks in advance.
https://www.ebay.com/itm/PARFOCAL-C-MOU ... 2749.l2648
Thanks in advance.
Re: Inexpensive USB 2.0 camera test with two microscope types
It appears that the bare camera would attachgeo_man wrote:Hi all. I'm a newbie. Will this inexpensive camera properly attach to a "PARFOCAL C-MOUNT ADAPTER FOR Spencer, AO, American Optical TRINOCULAR MICROSCOPE"?
https://www.ebay.com/itm/PARFOCAL-C-MOU ... 2749.l2648
Thanks in advance.
... According to the ebay description, it has a 'C port'
https://www.ebay.com/itm/5MP-USB-CMOS-C ... 3451506194
But that would mean losing the 0.5x lens, and you would be putting a rather small sensor into place.
MichaelG.
.
https://en.m.wikipedia.org/wiki/Image_sensor_format
Note that the 'available' frame for C-mount is just a little smaller than the 4/3 format ... but this camera sensor is only 1/2.5"
Too many 'projects'
Re: Inexpensive USB 2.0 camera test with two microscope types
Thanks a lot, that's what I suspected. Probably better for me to get a more expensive one that will allow the .5x lens to be included, like this one:
https://www.amazon.com/gp/product/B074R ... ATMF5A2V9Z
Any other suggestions welcome.
https://www.amazon.com/gp/product/B074R ... ATMF5A2V9Z
Any other suggestions welcome.
Re: Inexpensive USB 2.0 camera test with two microscope types
IMO, the price is determined not only by the presence of a reducing lens (which IMO is indispensable) but by the USB type (3.0 vs 2.0), brand name (of no importance IMO) and features - image file types, custom white balance etc. The sensor size and pixel size vs number of pixels are important as well and have been discussed. Sorry that I cannot recommend any specific model.geo_man wrote:Thanks a lot, that's what I suspected. Probably better for me to get a more expensive one that will allow the .5x lens to be included, like this one:
https://www.amazon.com/gp/product/B074R ... ATMF5A2V9Z
Any other suggestions welcome.
Re: Inexpensive USB 2.0 camera test with two microscope types
Interesting, thank you for posting.
Suffolk, UK
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Re: Inexpensive USB 2.0 camera test
I'm curious how something like this one below compares with the above item:Hobbyst46 wrote: Example:
https://www.ebay.com/itm/5MP-USB-CMOS-C ... 2749.l2649
BTW, it is described as a 5MP camera, and the software menu includes a resolution of ~2500x~1900, but I could only get ~2000x~1500 from it in Snap mode (did not try Video yet), do not know why.
I am sure the Zeiss Neofluar relies on correction, e.g. with a KPL eyepiece. I will try with a planapo later on.
https://www.amscope.com/cameras/usb/5mp ... era-1.html
During an Amscope 15% off sale this can be purchased for about $216. Is the extra cost worth the USB 3.0 and software? I had planned on picking up a used DSLR but am finding myself a bit overwhelmed with figuring out specifics on correct C-mounts and t-mounts and what connects the t-mount to a c-mount. ...Sensors sizes, reduction lenses...arg, and then, do I want to invest in my specific scope or upgrade?
But hey, I made progress on darkfield today. Just needed to focus the condenser.
Heather
Re: Inexpensive USB 2.0 camera test
I doubt that the USB 3.0 and software are worth the extra cost. I do not know the AmScope cameras, except that @Scarodactyl has recently posted that he was not very happy with it.Sauerkraut wrote:I'm curious how something like this one below compares with the above item:Hobbyst46 wrote: Example:
https://www.ebay.com/itm/5MP-USB-CMOS-C ... 2749.l2649
BTW, it is described as a 5MP camera, and the software menu includes a resolution of ~2500x~1900, but I could only get ~2000x~1500 from it in Snap mode (did not try Video yet), do not know why. I am sure the Zeiss Neofluar relies on correction, e.g. with a KPL eyepiece. I will try with a planapo later on.
https://www.amscope.com/cameras/usb/5mp ... era-1.html
During an Amscope 15% off sale this can be purchased for about $216. Is the extra cost worth the USB 3.0 and software? I had planned on picking up a used DSLR but am finding myself a bit overwhelmed with figuring out specifics on correct C-mounts and t-mounts and what connects the t-mount to a c-mount. ...Sensors sizes, reduction lenses...arg, and then, do I want to invest in my specific scope or upgrade?
About cameras and microscope upgrades: the eyepiece camera is always transferable to another microscope - and if its objectives are infinity corrected, the results will be even better. And a very light-sensitive has been mentioned, along with some illustrating results, in another recent post on the forum. It was a 18MP Astro type camera - please see reference in your previous post "First Stain, and mounting". For prices in the hundreds of $$, I would look for proof of quality.
On the other hand, a DSLR might perhaps be an option. If you post description and photos of your microscope, especially the head, and which objectives (160mm/170mm or infinity), and which eyepieces you have, there is a good chance to receive excellent guidance from experts towards the setup, including which mechanical adapters are needed. A DSLR is very likely to give enjoyable images. And if it can be operated directly from the PC, it is very convenient.
Very good news! please provide some more details. Which microscope and condenser are you using ? which darkfield accessories ?But hey, I made progress on darkfield today. Just needed to focus the condenser.
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Re: Inexpensive USB 2.0 camera test with two microscope types
Thanks for the guidance hobbyist46. I’ll stick with my quest for a used DSLR then.
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Re: Inexpensive USB 2.0 camera test with two microscope types
I was indeed not too happy with the one I bought, but to be fair that was quite a few years ago. It's also possible I had a setting wrong with the software which was resulting in the weird interpolation I saw at 100%.
I still have it, somewhere. I need to track it down for a proper test.
Still, a used DSLR is hard to beat for value. You can get an amscope 2x adapter that should work fairly well with one--I haven't tried their dslr adapters myself but have heard positive things.
I still have it, somewhere. I need to track it down for a proper test.
Still, a used DSLR is hard to beat for value. You can get an amscope 2x adapter that should work fairly well with one--I haven't tried their dslr adapters myself but have heard positive things.