Search found 82 matches

by david_b
Fri Mar 27, 2020 11:27 am
Forum: Beginner's corner
Topic: Suspect OMAX Objectives?
Replies: 2
Views: 116

Re: Suspect OMAX Objectives?

Omax objectives can be 'metal' finish in both achromatic or plan, but the Plan objectives are marked "Plan"
The black finish is semi-plan.
https://omaxmicroscope.com/microscope-a ... tives.html
by david_b
Wed Mar 11, 2020 4:53 am
Forum: For forum members who want to buy and sell equipment
Topic: Wanted - Olympus Nfk 2.5x LD photo eyepiece
Replies: 0
Views: 2555

Wanted - Olympus Nfk 2.5x LD photo eyepiece

In perfect condition please.
Located in UK
by david_b
Thu Feb 13, 2020 9:50 pm
Forum: Pictures and Videos
Topic: My first film from my microscope!
Replies: 14
Views: 2815

Re: My first film from my microscope!

Well done!
The length of clips was just right for me.
by david_b
Sun Feb 09, 2020 7:59 am
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

PeteM wrote:
Sat Feb 08, 2020 11:25 pm
And the better Olympus UIS2 optics for the BX line will support optional 26mm fields (so, incidentally, will your SPlans with a UW Olympus finite head).
Yes! Now if only I could find one.. :D
by david_b
Sat Feb 08, 2020 10:26 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

I'm not sure Pete, I also have a BH-2 with WHK (high eyepoint) 10x/20, 23.2mm eyepieces. Viewing is much more comfortable with the Motic (resolution is better with the Olympus but that is likely the SPlan glass). 10x/20 doesn't seem uncommon for modern 30mm eyepieces - eg. Olympus CX33, Zeiss Primo ...
by david_b
Sat Feb 08, 2020 9:10 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

I confess to being a bit confused! Field of view is Field number divided by (eyepiece magnification x objective magnification) Tube diameter plays no part in the calculation? I'm comparing comfort of long term viewing of 30mm eyepieces vs 23.2mm, not field of view, which is the same for both (assumi...
by david_b
Sat Feb 08, 2020 5:04 am
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

hmm..well they seem to be 30mm eyepieces! Perhaps it is an optional head. It's a standard head. I'm not clear why you believe the eyepieces on the BA310 to be something other than 30mm. If you're referring to the 20mm measurement in your post above, that relates to the (wide) field of view, not the...
by david_b
Fri Feb 07, 2020 10:34 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

I fully agree with Apochromat. What do the eyepieces look like from the bottom? Well that is less than 30 and I am guessing the eyepiece itself may have some restrictions. Here are the measurements of the 30 mm eyepieces on my Leitz Diaplan. It's a 30mm eyepiece/tube. The inaccuracy was due to tryi...
by david_b
Fri Feb 07, 2020 6:33 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

My personal experience is a microscope built to maximize 30mm eyeieces has no deficit in brightness. Quite the contrary the view is much brighter. This is especially true when used with wider field objectives. Withn that said I was not aware the Motic BA310 had 30 mm view eyepieces. Their website i...
by david_b
Fri Feb 07, 2020 6:31 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

I understand how more magnification gives less light, but I don't understand why a wider fov would. 30mm is generally nicer but as said above it shouldn't make a difference on image convergence. What was your previous scope? Brunel infinity scope. Actually produced a good quality image, but the Mot...
by david_b
Fri Feb 07, 2020 12:23 pm
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

Re: 23.2 vs 30mm

Larry060 wrote:
Fri Feb 07, 2020 12:12 pm
What make is your 30mm microscope?
Motic BA310
by david_b
Fri Feb 07, 2020 10:24 am
Forum: Microscopes and optics
Topic: 23.2 vs 30mm
Replies: 38
Views: 5741

23.2 vs 30mm

I am used to 23.2mm eyepiece tubes but recently acquired a compound microscope with 30mm eyepieces. What a difference! No more squinting or struggling to get my brain to see one image instead of two. Now I have a clear, bright field of view that is much more relaxing to use for long periods. I have ...
by david_b
Sun Feb 02, 2020 8:28 pm
Forum: Pictures and Videos
Topic: Micrographs in Black & White
Replies: 22
Views: 3309

Re: Micrographs in Black & White

Very nice!
by david_b
Sun Feb 02, 2020 7:56 pm
Forum: Camera systems and imaging
Topic: Adaptors from 50 to 500$..how is it possible ?
Replies: 10
Views: 2109

Re: Adaptors from 50 to 500$..how is it possible ?

Depending on your classroom setup, equipment availability and number of students, HDMI connection to a large stand-alone monitor may be a better solution than USB to a laptop or PC.
by david_b
Sun Feb 02, 2020 7:26 pm
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 5461

Re: Olympus BX60F

That Lumenera is $3600 for 3.3mp? :shock: I guess that it is a highly sensitive camera, probably much more sensitive than a DSLR, at least in some parts of the spectrum. For scientific fluorescence studies, sensitivity can be more important than the no. of pixels. The main challenge in fluorescence...
by david_b
Sun Feb 02, 2020 2:08 pm
Forum: Camera systems and imaging
Topic: What is a good video camera to use with a microscope?
Replies: 20
Views: 6017

Re: What is a good video camera to use with a microscope?

The NFK 2.5x is intended for full frame cameras; your Nikon D3300 is DX format.
by david_b
Sun Feb 02, 2020 1:32 pm
Forum: Camera systems and imaging
Topic: Adaptors from 50 to 500$..how is it possible ?
Replies: 10
Views: 2109

Re: Adaptors from 50 to 500$..how is it possible ?

Does the Fuji have HDMI output?
by david_b
Sun Feb 02, 2020 12:46 pm
Forum: My microscope
Topic: Olympus BX60F
Replies: 22
Views: 5461

Re: Olympus BX60F

That Lumenera is $3600 for 3.3mp? :shock:
by david_b
Sun Feb 02, 2020 7:14 am
Forum: Camera systems and imaging
Topic: Adaptors from 50 to 500$..how is it possible ?
Replies: 10
Views: 2109

Re: Adaptors from 50 to 500$..how is it possible ?

If you already have the camera and pancake lens, why not try first by setting up on a tripod?
by david_b
Thu Jan 30, 2020 11:38 pm
Forum: Camera systems and imaging
Topic: What is a good video camera to use with a microscope?
Replies: 20
Views: 6017

Re: What is a good video camera to use with a microscope?

What photo tube & eyepiece are you using?
by david_b
Thu Jan 30, 2020 8:28 pm
Forum: Camera systems and imaging
Topic: What is a good video camera to use with a microscope?
Replies: 20
Views: 6017

Re: What is a good video camera to use with a microscope?

Is there a fault with your camera or cable?
According to this Live view should be possible...
https://www.dummies.com/photography/cam ... view-mode/

Also, you should be able to power the camera using a dummy battery. Check eBay.
by david_b
Wed Jan 29, 2020 4:52 pm
Forum: Beginner's corner
Topic: The right adapter
Replies: 11
Views: 2416

Re: The right adapter

You would also need the T2 ring for which they want 31.90 euros plus shipping!
Again, much cheaper on ebay.
This thread may be helpful:

viewtopic.php?f=9&t=8504
by david_b
Wed Jan 29, 2020 4:36 am
Forum: Introduce yourself
Topic: Rant: Why it is difficult to buy a microscope - by webiste moderator
Replies: 10
Views: 2750

Re: Rant: Why it is difficult to buy a microscope - by webiste moderator

To me, on a more important note, is why I can't achieve a sharp image with my 24Megapixel Nikon camera through the proper phototube. I have tried everything. I even experimented with my camera and made a simple adapter to take pictures through the eyepiece thinking that the problem might be in the ...
by david_b
Mon Jan 27, 2020 10:23 am
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 23
Views: 6266

Re: How to attach camera to Olympus BH2?

And 21mm from the base to the aperture
by david_b
Sat Jan 25, 2020 1:30 pm
Forum: Camera systems and imaging
Topic: HA2307 HDMI industrial camera
Replies: 48
Views: 14656

Re: HA2307 HDMI industrial camera

I have to say after living with this camera for several weeks, I can not wait for my Nikon to come back. The thing that bothers me the most about this camera is the automatic exposure. It supposedly has exposure compensation through the menu, but it doesn't function correctly. Maybe I just don't un...
by david_b
Fri Jan 24, 2020 4:00 am
Forum: Microscopes and optics
Topic: Flipping
Replies: 3
Views: 672

Re: Flipping

BramHuntingNematodes wrote:
Thu Jan 23, 2020 7:02 pm
flip it down for the 4x and 10x. Flip it up for the 20 and 40x.
Seems simple enough, thank you!
by david_b
Thu Jan 23, 2020 6:54 pm
Forum: Microscopes and optics
Topic: Flipping
Replies: 3
Views: 672

Flipping

I aquired a BH-2 BHS recently and it came with a flip top condenser (and 4x, 10x, 20x, 40x SPlans)
So, what is the flip top for: when does one flip and when not?

Image
by david_b
Fri Jan 17, 2020 9:01 pm
Forum: Camera systems and imaging
Topic: DSLR or Integrated?
Replies: 11
Views: 1823

Re: DSLR or Integrated?

The EOS RP is a reasonably priced mirrorless camera which can be controlled by EOS Utilities.
by david_b
Tue Jan 14, 2020 4:06 pm
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 693

Re: BH-2 Focus adjustment question

The side that doesn’t come off will simply pull out. Planetary gears, along with small nylon gear on fine focus shaft, will be visible. Good luck There is a small amount of play in the nylon gear in the photo but none of them seem damaged. The small nylon wheel in the fine focus shaft looks ok too....
by david_b
Tue Jan 14, 2020 1:36 pm
Forum: Microscopes and optics
Topic: BH-2 Focus adjustment question
Replies: 16
Views: 693

Re: BH-2 Focus adjustment question

Sometimes shims have not been applied. Depending on the backlash between gear box and rack which you can now see, some maybe applied to take up the excess slack. There should always be a small amount of play though. The lubricant in the gear box looks like it requires replacing. It should spin quit...