Fossil Marine Diatoms in Brightfield

[rnabholz]

More experimentation with the AO4 using the phone. These are fossil marine diatoms cleaned by Michel Haak, and mounted by Kurt.

The first is a stack of eight images, the rest are single frames.

AO4, 90x Apo Oil, afocal through 10 Compens eyepieces to a Nexus 6 phone.

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[rnabholz]

One More

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[KurtM]

Those images are freaky good, just brilliant! Now that's some of the prettiest diatom imagery I've ever seen, and should be excellent for diagnostics too.

[billbillt]

Hi Rod,

I don't think I have seen such sharpness and clarity in a diatom photo as you have presented here!.. This is fantastic work!..

BillT

[75RR]

Nice details! Especially like the last one. Any idea of their size?

[Crater Eddie]

Wow! Super sharp!
CE

[rnabholz]

Those images are freaky good, just brilliant! Now that's some of the prettiest diatom imagery I've ever seen, and should be excellent for diagnostics too.

Thanks very much Kurt. I am starting to understand what all the APO fuss is about.

[rnabholz]

Hi Rod,

I don't think I have seen such sharpness and clarity in a diatom photo as you have presented here!.. This is fantastic work!..

BillT

Thanks very much Bill - very much appreciated!

[rnabholz]

Nice details! Especially like the last one. Any idea of their size?

Thanks 75.

I haven't done the measurements with the stage micrometer yet, but with my past experience with these I would say that the Centric was around 100 to 120um, and the rest probably fell in the 60 to 100um range.

[rnabholz]

Wow! Super sharp!
CE

Thanks CE.

[exmarine]

Well Rod what can one say that has not been said already except 'I'm impressed great shots' nice one son.

[rnabholz]

Thanks exmarine.

[Radazz]

Just... Wow!

[rnabholz]

Just... Wow!

Thank you Radazz.

[rnabholz]

One more stack of 10 that I forgot to post.

[apochronaut]

The thing that happens too, is that because the lens is contributing such a low level of chromatic aberration, the shadowing is unencumbered by colour distortion and a real sense of 3 dimensions begins to take place. You can actually see curvature. great shots, Rod, and great mounting too, Kurt.

[rnabholz]

The thing that happens too, is that because the lens is contributing such a low level of chromatic aberration, the shadowing is unencumbered by colour distortion and a real sense of 3 dimensions begins to take place. You can actually see curvature. great shots, Rod, and great mounting too, Kurt.

Thanks for that Apo- really had not thought about the Apo effect on shadows. I am very happy with the results so far.

Rod

[quantum]

Those images are so inspiring.

Could you elaborate on the setup you use with your phone? In particular, I am looking for a good mechanical mount. Does yours allow you to easily set the distance from the eyepiece to the phone lens?

Also, do I assume correctly that your AO4 has the optional lens above the nosepiece?

Thanks!

[rnabholz]

Thanks

I used a digiscoping mount for the phone.

Search Amazon for this: B0140U9ZPG

It works well, a bit fiddly until you get it set up. Highly adjustable. The photos at the listing will give you an idea.

I used it with both phones and small cameras with good success.

As to the optional lens you ask about, I am sorry, I am not sure what you are referring to.

Rod

[quantum]

Thank you very much--that camera/phone adapter looks like exactly what I need.

I am new to the AO4 and AO2 and still learning. I have three project scopes I picked up cheap on ebay. They should clean up well and I am refurbing them. They have just the achromat optics. Your AO4 is equipped with the apochromat and the compensating eyepiece, I think you said. I have heard that maybe with that combination AO put an additional lens between the objective and the eyepiece assembly. I am not sure and cannot find anything in the catalog about it. (But AO would apparently not sell you just the apochromatic objective and compensating eyepiece--maybe other unstated parts were required.

So my question was just trying to figure out what the story is with that. Since your setup works so well, I figure that is the way it should be set up. On my units, if I take the objectives and the body with the eyepiece off, there is nothing but "air" looking down the turret hole. I was just wondering whether sometimes there is a lens in there.

I was just asking in case you happened to know. Please do not take your scope apart to answer the question--let it sit just the way it is.

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