Search found 151 matches

by david_b
Thu Nov 26, 2020 8:22 pm
Forum: Camera systems and imaging
Topic: Swift 380T + dslr adapter
Replies: 11
Views: 147

Re: Swift 380T + dslr adapter

If the first image is what you see through the eyepieces, then I would suggest there is something wrong with your setup, not related to camera/imaging.
I would expect to see much clearer, sharper images through the eyepieces.
by david_b
Sun Oct 04, 2020 8:28 am
Forum: Microscopes and optics
Topic: Depth of field
Replies: 8
Views: 448

Re: Depth of field

I have been coveting Splan apo's, but as most of my observations involve 3D specimens, not so much now. The shallow depth of field also imposes stringent setup requirements, which can be challenging. Yet high magnification coupled with high numerical aperture (NA) is where the fine details are reve...
by david_b
Sat Oct 03, 2020 4:11 pm
Forum: Microscopes and optics
Topic: Depth of field
Replies: 8
Views: 448

Re: Depth of field

It’s somewhat counterintuitive, but the higher the power of the objective, the greater the depth-of-focus (at the film/sensor plane) even though the depth-of-field (at the subject plane) decreases dramatically. Indeed. I have been coveting Splan apo's, but as most of my observations involve 3D spec...
by david_b
Fri Oct 02, 2020 11:36 am
Forum: Microscopes and optics
Topic: Depth of field
Replies: 8
Views: 448

Re: Depth of field

viktor j nilsson wrote:
Fri Oct 02, 2020 10:39 am
Yep, that is an inescapable optical property.
You can read more about the relationship between NA and depth of field here:
https://www.microscopyu.com/microscopy- ... h-of-focus
Good information, thank you.
by david_b
Fri Oct 02, 2020 9:59 am
Forum: Microscopes and optics
Topic: Depth of field
Replies: 8
Views: 448

Depth of field

I have been using a Motic BA310 with Motic's standard plan lenses. The 10x objective (for purpose of comparison) has an NA of 0.25. I have recently aquired an Olympus BHS with Splan oblectives. The NA of the Splan 10x is 0.30. Comparing the two, I notice that the resolution of the Olympus is greater...
by david_b
Thu Sep 03, 2020 6:13 am
Forum: Pictures and Videos
Topic: The best Camera for Photomicrography
Replies: 24
Views: 2011

Re: The best Camera for Photomicrography

Here’s a small crop from David’s image, for convenient reference: Thanks Michael, yes that's what I'm talking about. I downloaded one of the images from the >$10k Leica dedicated camera referred to in the article. Opening at 100%, I'm not seeing the noise or artifacts here, but sharpness & resolvin...
by david_b
Tue Sep 01, 2020 10:17 pm
Forum: Pictures and Videos
Topic: The best Camera for Photomicrography
Replies: 24
Views: 2011

Re: The best Camera for Photomicrography

David, Sorry to be a pest, but may I suggest that, for clarity, you identify the three images in your post ... They appear to be in reverse order compared to those on the web page. MichaelG. L to R Rising Sun D500 D800 The artifacts in the RS example do appear to be jagged diagonal lines as describ...
by david_b
Tue Sep 01, 2020 12:24 pm
Forum: Pictures and Videos
Topic: The best Camera for Photomicrography
Replies: 24
Views: 2011

Re: The best Camera for Photomicrography

P.S. __ With the greatest respect ... I find it difficult to accept the conclusion [on your web-page] from the analysis of the comparative images Agreed, of the comparative diatom images, the Rising Sun shows much better sharpness and detail than both DSLR examples. To follow up, I downloaded the f...
by david_b
Sun Aug 30, 2020 1:39 pm
Forum: Pictures and Videos
Topic: The best Camera for Photomicrography
Replies: 24
Views: 2011

Re: The best Camera for Photomicrography

MichaelG. wrote:
Fri Aug 28, 2020 8:46 am
P.S. __ With the greatest respect ...
I find it difficult to accept the conclusion [on your web-page] from the analysis of the comparative images
Agreed, of the comparative diatom images, the Rising Sun shows much better sharpness and detail than both DSLR examples.
by david_b
Tue Aug 11, 2020 9:00 pm
Forum: Camera systems and imaging
Topic: iOS App for using iPhone as camera
Replies: 2
Views: 897

Re: iOS App for using iPhone as camera

What features make this a microscope camera?
Manual focus, zoom, manual white balance etc. already available on apps eg. Moment
by david_b
Sun Aug 09, 2020 2:56 pm
Forum: Microscopes and optics
Topic: Trinocular Projection Lenses for DSLRs
Replies: 130
Views: 9772

Re: Trinocular Projection Lenses for DSLRs

I think you may have chosen the one area where it’s questionable, David ... Most of the Nikon image looks much crisper to me, and I would posit that your sampled area is simply out-of-focus on the Nikon image [the rest of it being sufficiently good to make that obvious ... which is not the case on ...
by david_b
Sun Aug 09, 2020 1:57 pm
Forum: Microscopes and optics
Topic: Trinocular Projection Lenses for DSLRs
Replies: 130
Views: 9772

Re: Trinocular Projection Lenses for DSLRs

I question how the Nikon image can be considered better in the first pair.

Details of the woody stem image:

Generic:
Screen Shot 2020-08-09 at 14.50.48.png
Screen Shot 2020-08-09 at 14.50.48.png (54.51 KiB) Viewed 1892 times
Nikon:
Screen Shot 2020-08-09 at 14.51.08.png
Screen Shot 2020-08-09 at 14.51.08.png (46.39 KiB) Viewed 1892 times
by david_b
Sun Aug 09, 2020 11:33 am
Forum: Microscopes and optics
Topic: Trinocular Projection Lenses for DSLRs
Replies: 130
Views: 9772

Re: Trinocular Projection Lenses for DSLRs

In the woody stem example there is a lot more detail in the generic objective than the Nikon.
In the second example (lily, non-parfocal) there is more detail with the Nikon than the generic.
Suggesting another variable (like focus) needs to be eliminated for an effective comparison.
by david_b
Wed Aug 05, 2020 2:43 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Surely Motic makes a standard (ocular) 23.3mm eyepiece that could be used with the Celestron. Have you asked about that? If they don’t, an Amscope or other modern Chinese made eyepiece is likely to give acceptable results. (No worse than the generic optics LabCam provides.) There's this one....? ht...
by david_b
Wed Aug 05, 2020 1:56 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Thanks John yes I understand but the dovetail on the top of the U-spt is 37mm and fits perfectly into th eMotic photo port (37.5mm approx).
The eBay item states 42mm so I don't think it will fit.
by david_b
Wed Aug 05, 2020 9:55 am
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Hi, I wonder if this item would take you from the photoport (in your 1st posted image) to a c-mount to 'start-off' camera access? As alreadt said, your isn't an Olympus BX type port but a plain (i.e. without dovetail 'socket') socket that may take the linked-to adapter.... The Motic photo port does...
by david_b
Wed Aug 05, 2020 9:06 am
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Looks like a good result I will be interested to see photos from the LabCam MichaelG. This is my fallback in case the problem with the photo eyepiece described in the other thread cannot be resolved by Motic (no reply yet to dealer's enquiry). However, LabCam expensive and I am unimpressed with the...
by david_b
Tue Aug 04, 2020 8:53 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

And yes, the image though a suspended eyepiece is sharp at approx. the same distance.

You should work for Labcam!

Thank you!
by david_b
Tue Aug 04, 2020 8:47 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

If Motic designed their camera adapter in the same way that most other manufacturer's do, then yes, inserting the LabCam there should work. You have direct access to the location where the photo eyepiece sits, correct? Because if it is deep down inside a tube, the LabCam won't be able to rest in th...
by david_b
Tue Aug 04, 2020 7:28 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

By the way, the statement in the 1st post about Olympus BX having the same fitting is wrong. Please disregard!
by david_b
Tue Aug 04, 2020 7:19 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

This doesn't give me much confidence. The text on Amscope's own product page is a little more reassuring: https://www.amscope.com/adapter-converting-c-mount-to-23mm-and-or-30mm-photo-port.html It appears that there is , as one might hope, a c-female thread in the adapter ... cunningly hidden in the...
by david_b
Tue Aug 04, 2020 6:18 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Labcam says, "Your LabCam purchase already includes the 30mm and 23.2mm adapters". Is the photo eyepiece not 23.2? Other sizes would be unusual. Ah, I see what you mean. The Motic tube is indeed 23.2mm dia but is 9cm in length. Would inserting the LabCam in this tube result in a correct size image?
by david_b
Tue Aug 04, 2020 6:14 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Please forgive my ignorance, David ... but I don’t understand this statement on the LabCam web-page: Precision: Attaches in 10 seconds to your iPhone and microscope by simply inserting into c-mount or eye-piece slot. How to they contrive to ‘insert’ the lens into a c-mount, when the male c-thread i...
by david_b
Tue Aug 04, 2020 4:41 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

MichaelG. wrote:
Tue Aug 04, 2020 12:15 pm
I’m not familiar with either Motic or Olympus version, David ... but this looks a useful place to start your quest:
https://www.lmscope.com/en/olympus_BX_serie_en.html

MichaelG.
Thanks, LM's solution is 169 euros which is more than I want to spend on an adapter with no optics...
by david_b
Tue Aug 04, 2020 4:34 pm
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Re: Photo tube adapter

Motic sells t-mount photo tubes for your microscope. The adapter accepts a photo eyepiece designed to project the image to a camera sensor. That is likely the same 30mm size as the normal eyepieces. You should confirm with your dealer. Documentation isn’t great, but if it is like other photo tubes ...
by david_b
Tue Aug 04, 2020 7:59 am
Forum: Microscopes and optics
Topic: Photo tube adapter
Replies: 33
Views: 2414

Photo tube adapter

This is the photo tube mount on a Motic BA310. It appears to be the same as Olympus BX.
What is this type of mount called?
I'm looking to mount a LabCam so need an adapter that will accept a 30mm eyepiece tube but not sure what to search for?

IMG_2860.jpg
IMG_2860.jpg (37.46 KiB) Viewed 1851 times
by david_b
Fri Jul 31, 2020 6:24 am
Forum: Camera systems and imaging
Topic: Help with iPhone setup on ‘70s Leitz Dialux?
Replies: 18
Views: 1513

Re: Help with iPhone setup on ‘70s Leitz Dialux?

I struggled with the Gosky type of adapter, though I'm aware that many have had more luck. The main problem I found was the difficulty of adjusting along the third axis (Z-axis) I recently discovered the Celestron NEXYZ adapter, and I am very happy with it. I have never tried using it on the trinocu...
by david_b
Thu Jul 30, 2020 12:17 pm
Forum: My microscope
Topic: Olympus BH-2 BHS
Replies: 10
Views: 1540

Re: Olympus BH-2 BHS

carlh6902 wrote:
Thu Jul 30, 2020 4:35 am
The issue with the diopter ring running out of range on the left side could be due to an improper tube length on the right side. That does look like a nice scope! The worn gear can be purchased third party in the US.

Carl
Thank you.
by david_b
Wed Jul 29, 2020 6:00 pm
Forum: My microscope
Topic: Olympus BH-2 BHS
Replies: 10
Views: 1540

Re: Olympus BH-2 BHS

Wow it's really hard to find competent service people for anything these days. You're very fortunate to have found this one. Can you imaging and auto mechanic taking the time to send a video and go over what was done to your car. I can't, especially not for a repair bill of less than £200. Looks li...