Sorry for the rain

[David Kirjassoff]

Just finished building a 3d printed binocular telescope. 400mm f5 and illuminates 2” eyepieces. Managed a few looks at M42 late the night I finished it. And it’s been overcast ever since!

Happy holidays to all!

[Richard Navarrete]

Awesome ! You were telling me about them at Coe. I hope I get a chance to look through them someday.

Richard

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On Monday, December 22, 2025, 1:09 PM, David Kirjassoff <dkirj...@gmail.com> wrote:

Just finished building a 3d printed binocular telescope. 400mm f5 and illuminates 2” eyepieces. Managed a few looks at M42 late the night I finished it. And it’s been overcast ever since!

Happy holidays to all!

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[Akarsh Simha]

Are these based on the analog sky design by any chance?

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[Joel Lee]

Awesome looking binoscope! Look forward to hearing more about the views through them!

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[Surya Rao]

Sounds very interesting. Can you please post some pictures?

Surya

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[Surya Rao]

Nvm. Image opened finally.

Surya 

[David Kirjassoff]

Richard, next chance we get I'll bring them along. I was so impressed by your binoviewer on your AT80ED and this is like two of those hooked together so twice the light.  Of course just a simple chinese cemented achromat - no ED in sight. But the objectives are BBAR coated and the mirrors are dielectric. Akarsh, yes this is the Analog Sky Heart design. I bought a full kit from them as I don't 3D print yet.  I like the design: the optical tubes are offset so you can get usable IPD using only one set of mirrors, and it has magnetic filter slots so you can add/change filters with the eyepieces still in place.  Surya, here are a few more pics:

[David Kirjassoff]

[David Kirjassoff]

[Ted Hauter]

A work of art there!

On Mon, Dec 22, 2025, 2:31 PM David Kirjassoff <dkirj...@gmail.com> wrote:

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[David Kirjassoff]

Finally had clear skies for some observing with the AnalogSky Heart binoculars.  I did some collimation which helped a bunch, and mounted it on my sachtler video tripod. Using mostly AT 15.5mm eyepieces I had great views of the moon using 50mm objective masks.  Next up was M42, no filter first, then the DGM NBPs, then some O iii.  I’d have to say the Oiii produced the best views, with nebulosity quite present even with direct vision.  And this is with a 3/4 moon and my bright suburban sky.

Last view was of the Andromeda galaxy,  quite visible at the core but losing a lot in the moon glare. 

I really enjoy the binotelescope experience, very light (-8 lbs) for grab and go, comfortable viewing angle, and much less tiring to view with both eyes. 

David

[Ted Hauter]

Congratulations on a first and more light.

Two eyes / objectives adds major boo coo bucks views in a small package. 100mm x 2 is like 3 times the light grasp of a 100mm.

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[Ted Hauter]

Also two 100mm on the moon would give my 6 inch ED refractor I had a challenge.  My APM SD 100mms beats it and I preferred the 6 inch on the moon (most things really) over the C14 I had.