Nikon BD Plan 40x/0.65 210/0 vs ED Plan

[anto74]

Hello,
what is the difference between this two objective?
They are similar or ED plan is better?
I would use 40x for wings detail (1mm working distance)
The Elwd version are too expensive for me for this kind of shots (only few shots of wings)
Thanks
Antonio

[anto74]

Hello,
what is the difference between this two objective?
They are similar or ED plan is better?
I would use 40x for wings detail (1mm working distance)
The Elwd version are too expensive for me for this kind of shots (only few shots of wings)
Thanks
Antonio

Any help please?
Or M Plan version is better?
Antonio

[ChrisR]

I can't think of an ED Plan objective. Where have you seen it?

[anto74]

I can't think of an ED Plan objective. Where have you seen it?

Hello Chris,
here: https://www.ebay.it/itm/Nikon-ED-Plan-4 ... 2407756621

Antonio

[ray_parkhurst]

I have picked up several ED Plans at surplus sales, but they do not seem to be any different from their respective BD Plans. Maybe they were built for microscopes intended for "epi" illumination? The ones I have purchased were mounted to wafer inspection microscopes. I have not checked to see if their illumination angles are the same. The ED/BD Plans also seem to be optically the same as the M Plan versions, just with added coaxial lighting provisions.

Edited to add: You may have an easier time with illumination by removing the outer shroud from an ED/BD Plan than you will from the larger mechanics of the respective M Plan. I don't have a 40x ED/BD but my 10x BD is much smaller than my 10x M Plan, and my 20x BD is still smaller as is required to accommodate the BD illumination paths. I assume the 40x BD would follow the same principle.

[anto74]

I have picked up several ED Plans at surplus sales, but they do not seem to be any different from their respective BD Plans. Maybe they were built for microscopes intended for "epi" illumination? The ones I have purchased were mounted to wafer inspection microscopes. I have not checked to see if their illumination angles are the same. The ED/BD Plans also seem to be optically the same as the M Plan versions, just with added coaxial lighting provisions.

Thanks Ray
Antonio

[ray_parkhurst]

You may have an easier time with illumination by removing the outer shroud from an ED/BD Plan than you will from the larger mechanics of the respective M Plan. I don't have a 40x ED/BD but my 10x BD is much smaller than my 10x M Plan, and my 20x BD is still smaller as is required to accommodate the BD illumination paths. I assume the 40x BD would follow the same principle.

[anto74]

You may have an easier time with illumination by removing the outer shroud from an ED/BD Plan than you will from the larger mechanics of the respective M Plan. I don't have a 40x ED/BD but my 10x BD is much smaller than my 10x M Plan, and my 20x BD is still smaller as is required to accommodate the BD illumination paths. I assume the 40x BD would follow the same principle.

Thanks Ray
The next week i will have my new (used) BD Plan 40x
Thanks
Antonio

[Lou Jost]

If you take off the shroud, you might try to do it non-destructively. BD lighting can be wonderful for some subjects, so you might want to use it in the future, even if you think you don't need it now.

[ray_parkhurst]

If you take off the shroud, you might try to do it non-destructively. BD lighting can be wonderful for some subjects, so you might want to use it in the future, even if you think you don't need it now.

The outer case of my 10x and 20x BD Plan objectives unscrew from the body and come off easily, along with the plastic ringlight pipe. I assume the 40x is the same. My BD EWLD's are not the same, and look like they would need to be machined to remove the outer case.