Search found 106 matches

by MikeBradley
Thu Nov 19, 2020 2:06 am
Forum: Introduce yourself
Topic: Hello from Delta/Surrey Canada
Replies: 3
Views: 115

Re: Hello from Delta/Surrey Canada

Rock9, welcome to the forum. I'm based on the Sunshine Coast and I knew the old Vancouver Telescopes. The business restructured a few years ago and now operates as Markarian Fine Optics on Kingsway. One of the original owners is still involved and so is the optical technician. https://markarianfineo...
by MikeBradley
Wed Oct 14, 2020 4:50 pm
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

Pete,thanks for the ideas. I tried sliding the eyepiece tube sideways after removing the screws and the required offset would clip a large part of the FOV. The photo tube is collimated perfectly with the right eyepiece and so the head is useable for viewing and imaging, just not as a bino. so all is...
by MikeBradley
Wed Oct 14, 2020 2:05 am
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

75RR, I did try to use the collimation procedure shown in Ron Greens guide for this head but I was not successful. The guide suggests that collimation involves "Slacken screws and slide eyepiece tube into collimation", but the 3 screws only loosened the eyepiece tube from the bar, there is no latera...
by MikeBradley
Tue Oct 13, 2020 2:24 am
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

I checked for any evidence of the original position but didn't find any, only the cracked "non-standard glue" from the last repair job. By placing a temporary thin wooden shim behind it, the prism is now secured firmly in the holder and the offset between the eyepieces has been reduced from 1.45 mm ...
by MikeBradley
Sun Oct 11, 2020 4:52 am
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

I answered ny own question, the answer is no. What was probably obvious to many, the ocular parts of a CZ Standard bino head cannot be used to replace the equivalent parts in a trinoc.
duh!
Michael
by MikeBradley
Sat Oct 10, 2020 5:10 am
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

Just a thought, would it be possible to replace the bino parts in the trinocular head for the equivalent parts from an undamaged binocular head? The microscope originally had such a head and I think I can retrieve it.
Michael
by MikeBradley
Fri Oct 09, 2020 3:43 pm
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

Good eyesight Hobbyist46, fortunately it was only an artifact (dirt). However when I opened the head the left prism shows minor damage at both top corners, there are matching light scratches on the inside surface of the casing. So I know why the misalignment exists and that the prism damage is minor...
by MikeBradley
Fri Oct 09, 2020 2:53 am
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

Thanks everyone. Yes the offset between the FOVs is rather large. almost 1.5 mm. I took a couple of images today to illustrate this. I purchased the head online and it arrived by mail but I didn't check the alignment then. But since then it hasn't suffered any knocks. Photos of the head are attached...
by MikeBradley
Thu Oct 08, 2020 3:23 pm
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Re: Aligning Zeiss Standard trinocular head

Thanks Jeff and Doron for the reference. I did have a look at the guide from Ron Green but he only describes techniques to apply to ensure that everything is aligned. I also need to know how to actually make the internal adjustments and whether I need specialist tools to do them. Any pointers would ...
by MikeBradley
Wed Oct 07, 2020 2:43 am
Forum: Microscopes and optics
Topic: Aligning Zeiss Standard trinocular head
Replies: 18
Views: 795

Aligning Zeiss Standard trinocular head

I'm trying to align a trinoc head from my Zeiss Standard GFL. One of the oculars is out of alignment laterally by approximately half a field of view (4x objective, 10x ocular). The camera tube and the other ocular are well aligned. Where I could find instructions on how to repair this and how diffic...
by MikeBradley
Sat Aug 22, 2020 12:44 am
Forum: Identification help
Topic: Help needed identifying two specimens
Replies: 4
Views: 826

Re: Help needed identifying two specimens

Thanks for the suggestion 75RR, I'm now thinking that that image may well be from a branchiopod body part or perhaps part of a larval casing. I'll keep looking! I did take look at Aulacoseira sp. and that was a very interesting and informative diversion from my quest, thanks for the idea. I haven't ...
by MikeBradley
Wed Aug 19, 2020 4:41 am
Forum: Identification help
Topic: Help needed identifying two specimens
Replies: 4
Views: 826

Help needed identifying two specimens

I found these two specimens in a sample from the reed beds in a local freshwater pond. One seems to have some similarities to a pair of diatoms , but unlike any I've seen before, the pair is 60um wide and 75 long, it was taken at 20x 0.46NA . The other image was taken at 40x 0.95 NA and was moving s...
by MikeBradley
Mon Aug 03, 2020 12:40 am
Forum: Identification help
Topic: Is this a bedbug
Replies: 4
Views: 1013

Re: Is this a bedbug

Yes Bram, a sample vial would have been handy, they were in the car though, not the bedroom.

Don, thanks for your reassurance, it certainly doesn't look like any "bed-bug" image I've found, leaving alive the mystery of just what this creature was?
Michael
by MikeBradley
Fri Jul 31, 2020 4:26 am
Forum: Identification help
Topic: Is this a bedbug
Replies: 4
Views: 1013

Is this a bedbug

When I turned down the sheets on a hotel bed this morning I found this little critter, it was basically all black and 2mm long it moved across the fabric in short jerky movements, almost like a miniature robot After imaging it on my phone I crushed it, so there's no chance for further inspection and...
by MikeBradley
Thu Jul 09, 2020 7:42 pm
Forum: Resources (online, books etc.)
Topic: CDs and Books - Advanced microscopy
Replies: 0
Views: 662

CDs and Books - Advanced microscopy

I have in my possession a couple of slim books and CD’s that belonged to my friend Dr. Jim Pawley, formerly with UW Madison and UBC, Jim died last year. The CD’s and books are either unopened or in mint condition. I have no need for the items and thought they may be of interest to some members of th...
by MikeBradley
Sun Jun 28, 2020 4:39 pm
Forum: For forum members who want to buy and sell equipment
Topic: Olympus BH2 Teaching Bridge set for quick sale
Replies: 5
Views: 2114

Re: Olympus BH2 Teaching Bridge set for quick sale

Scarodactyl, yes, I hadn't thought of that but I suppose that a camera could be used on one (or even both) of the binocular heads and then the usual imaging method could be applied (afocal, relay, or NLK projection). It would be a bit bulky though.
Interesting idea.
Michael
by MikeBradley
Sun Jun 28, 2020 4:32 am
Forum: For forum members who want to buy and sell equipment
Topic: Olympus BH2 Teaching Bridge set for quick sale
Replies: 5
Views: 2114

Re: Olympus BH2 Teaching Bridge set for quick sale

Bob, Yes the PE is for an infinity design (stated in original post) but for some reason it was included in the package that I purchased and I have no use for it, someone might. The package that I'm selling is an add-on for an existing BH2 microscope, it adds the ability for two other users to observ...
by MikeBradley
Sun Jun 28, 2020 1:06 am
Forum: For forum members who want to buy and sell equipment
Topic: Olympus BH2 Teaching Bridge set for quick sale
Replies: 5
Views: 2114

Re: Olympus BH2 Teaching Bridge set for quick sale

PRICE REDUCED I'm still looking for a good home for this teaching bridge, the set is complete with 2 binocular heads, 4 objectives and all the bridge components, all in excellent condition (see images above). The price is now U$150 (buyer pays shipping). The PE projection eyepiece originally include...
by MikeBradley
Thu May 07, 2020 7:06 am
Forum: Pictures and Videos
Topic: Micro stonemasons. Difflugia.
Replies: 21
Views: 2929

Re: Micro stonemasons. Difflugia.

This is very helpful Charles, I couldn't get this info from the manual. One other question concerns the remote operation, is it possible to trigger the shutter using either their IR remote or the hardware switch when tethered to a computer running EOS Utility or some such program via usb cable? Than...
by MikeBradley
Wed May 06, 2020 6:27 am
Forum: Pictures and Videos
Topic: Micro stonemasons. Difflugia.
Replies: 21
Views: 2929

Re: Micro stonemasons. Difflugia.

I read with interest the reasons Charles gave for selecting the 90D. Does it suffer from the vibration issues that plagued the 60D and were still evident to a lesser degree in to 70D and 80D models despite them having EFCS?
Thanks
michael
by MikeBradley
Tue May 05, 2020 2:10 am
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

Scarodactyl, The M50 did connect to the computer, using live view, with either a cable or wifi, but when it's so connected the Bluetooth is disabled - by design it seems. This means that either I have to trigger the shutter from the computer, a metre and a half away or by touching the camera and ine...
by MikeBradley
Mon May 04, 2020 10:39 pm
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

Thanks for that tip Chris
Michael
by MikeBradley
Mon May 04, 2020 9:28 pm
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

Scarodactyl, I don't use it always but it is useful sometimes for positioning a moving object (eyepiece is widefield, image is cropped), checking focus when adjusting a 40x collar, that sort of thing. I like to be able to glance up from the eyepiece and see what the camera is seeing.
Michael
by MikeBradley
Mon May 04, 2020 3:38 pm
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

Thanks for the suggestion Scarodactyl, unfortunately the fixed LCD screen on the Rebel T6 would make its' use in my current setup rather tricky. The other features and the price do looks good though.
Michael
by MikeBradley
Sun May 03, 2020 9:58 pm
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

After a frustrating 3 days I returned the M50 to the store today, thanks to everyone on the site for their inputs. The store refund policy gave a full reimbursement, even including the used memory card. So now I’m back at square one, what camera to get? I’m going to re-browse the site, but any ideas...
by MikeBradley
Sun May 03, 2020 3:13 am
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

Bob, thanks very much for reminding me about the "silent mode" feature. It took some digging but I did find the feature on the M50 but it is only available when shooting in the so called "SCN" mode, in this mode the camera is set to "Auto" and there doesn't seem to be any way to regain control. The ...
by MikeBradley
Sun May 03, 2020 1:52 am
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Re: Canon M50 limitations

Chris, don't worry, EOS Utility does control the camera by USB tethering. My problem is that the computer is too far away from the microscope to be able to use it when trying to focus and capture moving protozoa. For that a remote control at the microscope is essential but neither the phone version ...
by MikeBradley
Sat May 02, 2020 7:30 pm
Forum: Microscopy accessories
Topic: Canon M50 limitations
Replies: 21
Views: 2553

Canon M50 limitations

I bought a Canon M50 to replace a 60Da to eliminate mirror vibrations on my BH2+NFK 1.67. The M50 promised to allow me to continue using use EOS Utility and the image quality is very good, but it doesn’t seem to be possible to live stream to EOS Utility and to use a remote control to trigger the sho...
by MikeBradley
Sat Mar 21, 2020 4:12 pm
Forum: Miscellaneous
Topic: "Fibres" common topic? Did you make interesting observations or photos?
Replies: 17
Views: 3369

Re: "Fibres" common topic? Did you make interesting observations or photos?

The latest edition of the Quekett Journal has a very interesting article titled "Animal, vegetable and mineral: fascinating fibres, their origins, structures and uses" by Joan Bingley - Quekett President. Joan approaches the topic as a microscopist who is also an embroiderer and textile artist. The ...
by MikeBradley
Tue Feb 25, 2020 7:20 am
Forum: Identification help
Topic: Protist ID help please
Replies: 0
Views: 7329

Protist ID help please

I found this protist in a pond water sample. There are very obvious membranelles, but no obvious AZM, I'm not even certain whether this is a side view or even a plan view. I've considered Halteria or Aspidisca as possibilities, but what do the experts here think?
Thanks for any help.
Michael