This should give existing BORG users even more options. Introducing the new BinoTechno 90mm objective lens, designed specifically for the BORG Series 80 system. By simply swapping the objective lens assembly, users can retain the existing mechanical design and accessories while upgrading to a different optical configuration.

I performed a star test last night at nearly 300× magnification, and it produced a textbook-perfect diffraction pattern. Very impressive!

As shown above, the color matches that of their erect-image mirror diagonal.

BinoTechno 90mm SD Triplet Objective Lens

Sightron’s high quality achromat – short and long versions are both in stock now.

infini D50 Achromat Telescope

Sightron D50L

Back in stock now. D50 – short version is expected to come in shortly too.

Sightron D50L

Finally AZ-40 and EM31Pro are in stock now.

Player One’s Uranus Pro looks the perfect cameras for the galaxies, especially when used with the super sharp optics. Here is why. Believe or not, the following image was taken through 375mm focal length telescope. Well resolved! And stars are not bloated much even the image frame was cropped.

Sightron SJH-75UF + Uranus-C Pro taken by Akihiro Yamazaki

In general, the scope must be said obviously too small for M51. But how about this? This should result from the small pixel camera and small spot size optics. This proves SJH-75UF performs not only for the wide-field but also for small galaxies.

This outcome really encourages me to try to shoot galaxies through SJH-75UF.

Japan’s BinoTechno proprietary – alignment-free platform allows BORG users to make BINO system ready to observe instantly once setting 2 objective lenses without any user adjustment. Here is the recent Japanese user’s setup.

And my 107FL and 90FL.

This BORG platform works with any of BORG 3″ and 4″ including old ED objective lenses. Quite versatile systems.

This time the strain wave mount was not popular yet. So I did the single fork mount setup. But setting BINO at the top of the mount is always much better and stable.

Star test for SJH-75UF and Player One Zeus-M. Both look good as expected. Since I was using M48 adapter, it might block the light at each corner of the full frame sensor. The scope uses Ohara Japanese plant’s SD and EDs. So it’s fully “Made in Japan”.

ToupTek D60 provided by Astro Hutech is pre-tested at the field. See at

ToupTek Astro HOPE D60 Astrograph

Zeus-M, Poseidon-M and some others including all guide cameras are back in stock now.

Player One special sale will end April 20th. Don’t miss this sales event. More units are on the way. If some items you are interested in are currently out of stock, e-mail to me. I will secure the special prices for you.

eADC3 is back in stock now.

Sunobserver eADC – Electronic Atmospheric Dispersion Corrector V3.0