nikon BD vs M objectives
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Re: nikon BD vs M objectives
https://www.ebay.com/itm/185675736298?m ... media=COPY
Nice setup just appeared on ebay with 4 bd plans, nikon coarse/fine post stand and illuminated semprex base. Needs an illuminator and trinoc head, plus dic nosepiece if desired, but it's a great setup for larger subjects a traditional scope can't handle without going too nuts with a measurescope. Not sure what you already have but this might be a good starting point, the one downside being how hard it is to find a loose illuminator with a rotating polarizer.
Nice setup just appeared on ebay with 4 bd plans, nikon coarse/fine post stand and illuminated semprex base. Needs an illuminator and trinoc head, plus dic nosepiece if desired, but it's a great setup for larger subjects a traditional scope can't handle without going too nuts with a measurescope. Not sure what you already have but this might be a good starting point, the one downside being how hard it is to find a loose illuminator with a rotating polarizer.
Re: nikon BD vs M objectives
Have a mostly working setup. Need to complete the lighting and camera 3d printed part.
My 3d printed rotatable sliders work fine for polorization. Am now looking the the dic setup.
The camera is a bit blurry just took the pic of the monitor with the phone. Camera 0.3 reducer lens needs to go in farther. It won't quite focus when the eyepieces are in focus.
My 3d printed rotatable sliders work fine for polorization. Am now looking the the dic setup.
The camera is a bit blurry just took the pic of the monitor with the phone. Camera 0.3 reducer lens needs to go in farther. It won't quite focus when the eyepieces are in focus.
Re: nikon BD vs M objectives
I tried a couple led lights not working great. So ordered 2 different spot point led modules. Will be here in a couple days.
https://www.digikey.com/en/products/det ... 1/14306822
https://www.digikey.com/en/products/det ... 01/6677124
The camera the chimney needs to be turned down and the inner part Needs to be opened up. so the reducing lens will fit.
https://www.digikey.com/en/products/det ... 1/14306822
https://www.digikey.com/en/products/det ... 01/6677124
The camera the chimney needs to be turned down and the inner part Needs to be opened up. so the reducing lens will fit.
Re: nikon BD vs M objectives
Quick work with a lathe.
And some cad for the 3d printed parts for the camera and light.
And some cad for the 3d printed parts for the camera and light.
- blekenbleu
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Rotating analyzer
That vertical illuminator has in front a slot for analyzer A slider just below the head;
I have only ever seen fixed circular polarizer analyzer A sliders:
... a rotating analyzer in that slot could be handy and something others (e.g. myself) would covet.
Supposing that its thread might match e.g. 50mm filter,Quick work with a lathe.
I tried and failed to unscrew the top part of that trinocular 'T' phototube
using heat gun to unseize thread-locking compound;
perhaps some solvent and/or torch would work...?
Metaphot, Optiphot 1, 66; AO 10, 120, and EPIStar 2571
https://blekenbleu.github.io/microscope
https://blekenbleu.github.io/microscope
Re: nikon BD vs M objectives
This is my current version of the polarizer and analyzer.
If the analyser could use a smaller lens say 18mm it could be made rotatable.
Any thoughts of using a 18 mm lens? Thinking it would be too small and may obscure some light.
I suppose we could do the cad if there is an interest.
If the analyser could use a smaller lens say 18mm it could be made rotatable.
Any thoughts of using a 18 mm lens? Thinking it would be too small and may obscure some light.
I suppose we could do the cad if there is an interest.
- blekenbleu
- Posts: 146
- Joined: Sat May 10, 2008 5:37 pm
- Location: U.S.
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Re: nikon BD vs M objectives
Optiphot's fixed analyzer A has 18mm polarizer opening;
A rotating 18mm filter might allow a 17mm polarizer opening, and I often crop images;
forfeiting 10% of possible field area seems IMO a tolerable trade-off for rotating analyzer convenience,
given that outer 6% of objectives' radius are often less ideal.
FWiW, given top and bottom holding things together,
perhaps teeth on rotating filter mount could be exposed on slider sides...
... but sourcing 19mm o.d. polarizing might be problematic,
and fitting a rotating 20mm o.d. filter in a 23mm wide slider seems a big ask.
Metaphot, Optiphot 1, 66; AO 10, 120, and EPIStar 2571
https://blekenbleu.github.io/microscope
https://blekenbleu.github.io/microscope
Re: nikon BD vs M objectives
tech2020 on ebay has the 18 mm
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Re: nikon BD vs M objectives
Just as a general note the quality of the polarizer matters a fair bit. On my setup I was using an empty slider someone had glued a polarizer into (allegedly a nikon rep using it for demonstration) which had good but not perfect extinction, and when I finally got a real Nikon one it made a noticeable difference. Xpol is much snappier and DIC can get deeper blacks.
- blekenbleu
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Re: nikon BD vs M objectives
Nice, knowing nearly nothing about 3D printing,phansen39 wrote: ↑Tue Nov 29, 2022 4:35 pm17 mm clear. 3d printed will be about 16.8
https://www.thingiverse.com/thing:5667953
surprised that analyzer/EPI STL files are larger than those for stackable slider.
Now, to sort getting them printed...
Metaphot, Optiphot 1, 66; AO 10, 120, and EPIStar 2571
https://blekenbleu.github.io/microscope
https://blekenbleu.github.io/microscope
Re: nikon BD vs M objectives
Dont print them yet. needs to be test fitted etc.
I will post when its good.
The thickness is for the plastic polarizer about 1 mm not the glass one. Don't know how thick they are.
Uploaded the stackable to the latest.
I will post when its good.
The thickness is for the plastic polarizer about 1 mm not the glass one. Don't know how thick they are.
Uploaded the stackable to the latest.
Re: nikon BD vs M objectives
The glass polarizer is 2.7 mm thick. does not leave much room
The analyzer has just enough room for the glass.
The analyzer has just enough room for the glass.
Re: nikon BD vs M objectives
Files updated on thingiverse.