香港天文論壇

with incredible details !!

Any information about your equipment ?
and imaging method ?

Sorry, I don't have any detailed drafts on paper, just in my brain. Will post the pic of the mount here once i finish the whole project. :) Like my style, I am often lazy to do any drafts for a project. Looking forward to seeing the final pic of your BIG MOUNT.

I am not sure if none at all really in our city now, but at least, all the foundaries of sand-casting aluminum alloy haved been moved into the mainland in my living area. Seemed I had contacted 振業鑄造廠 many years ago but they didn't have any interest to do it for me because of so small business to th...

To let the topic more informative, would you mind disclosing your whole design, like the shape of the big mount ? Or show us any drafts ?

[微笑] Thanks for your sharing Mr. Kwan. DIY is fun no matter what age you are, and just do it if you want to start it again. That's right. Hobbies is a lifetime commitment, they wouldn't disappear from your mind when you getting old. However, I have yielded to the fact, handling heavy gears or making...

Jupiter and Saturn 5/7/2021 8" Lxd55 Sct, 2x Barlow, ADC, Asi290mc AsiCap, Autostakkert, Registax, Winjupos, GIMP derotation really does help the quality of the image by reducing noise and enhancing fine detail http://www.hkastroforum.net/download/file.php?id=123489 http://www.hkastroforum.net/down...

DEC axis, almost done http://www.hkastroforum.net/download/file.php?id=123155 A good finished ! [Good Job] Your Declination housing looks machined from a piece of solid aluminium cylinder. Veiwing throught its polarscope hole, I can see, the wall of the housing seems remain certain thickness, I pre...

As no spec sheets coming with all the gears bought many years ago, I have used a vernier caliper to measure all the dimensions I need to know. If these measurement are correct, these pins can help me install the DEC gear wheel at the right position. Supporting pin.jpg Like a Radio Knob, can't get a...

Yes, it is a DC servo goto motor, controlled by Vixen Skysensor 2000PC controller. This controller is very powerful. The motor can run at sidereal speed after inputting the correct gear ratio of the mount into the controller. No need to write any program. If the load doesn't exceed its limit, the m...

To me, that is one of the most difficult part of re-building my DIY giant equatorial mount. http://www.hkastroforum.net/download/file.php?id=123052 From the shape of your motor, it should be a DC servo motor with encoder(the black part). Are you going to equip your new big mount with a Go-To system...

After clicking on the link, I found a more interesting topic "the end of the worlds" .
Who feels interesting, go and see the introduction directly on below link.

https://www.aavso.org/2021-webinars-abstracts#worlds

X4

Copernicus Crater Region and Ina Irregular Mare Patch 21/2/2021 8" sct, 2x barlow, asi290mc-s Firecapture, Autostakkert, Registax, GIMP copernicus close up,jpeg.jpg copernicus widefield.jpg http://www.hkastroforum.net/download/file.php?id=120350 http://www.hkastroforum.net/download/file.php?id=1203...