DeepSkyHosting
Sign inRegister

NGC 1499 California Nebula

UrmasX
2532983
Category:Deep Sky
Published:
1908
NGC 1499 California NebulaNGC 1499
Resolution:
5290x3226 px
File size:
13846 KB

Photo description / processing

While all normal people are photographing the lunar eclipse, I'm testing new equipment (I also shot the eclipse, by the way, it turned out so-so). First light of a homemade telescope on a homemade mount. Camera at the direct focus of a 216/775 mirror, focusing by moving the primary mirror. A training prototype, version 3, of a larger telescope - 300/1050. Mount on two harmonic drives of size 14, not fully debugged and originally designed for a smaller tube... Full Moon, towards the end of the eclipse.

Technical information

Telescope/Lens
Ведроид/Колесоид-85/ХЗ 216/775
Camera
ZWO ASI2600 Air
Mount
Самодельная гармошка 2х14
Guide Scope
Встроенный датчик
Guide Camera
SC2210
Accessories
корректор комы Sharpstar 2" 0.95; ZWO ASIAir в камере, ZWO EAF Pro
Software
SiriL, StarNet++, GraXpert
Location
Токсово, Россия

Light pollution

Red, Bortle 7 zone

Date taken

Exposure

  • 74 × 60″ · ISO/Gain: 101 · фильтр Svbony SV220 ·
  • 14 × 120″ · ISO/Gain: 101 · фильтр Svbony SV220 ·

Total exposure: 1 h 42 m

Comments

Oleg Novoselov
Interesting setup, would love to take a look.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
UrmasXReply to Oleg Novoselov
https://t.me/urmas_astro/539
There are a few more photos in the channel.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
Oleg NovoselovReply to UrmasX
I looked, thanks, but my opinion is that all 3D printing is bad; everything should warp from the temperature.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
UrmasXReply to Oleg Novoselov
The longest part is made of carbon fiber. It doesn't warp.
But yes, the early versions would deform even if you just looked at them ;)
Getting a milling machine for an apartment is overkill. One option is to laminate carbon fiber using 3D printing. But that will be for a larger version.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
Oleg NovoselovReply to UrmasX
What's the difference from a regular one? It's just filler material. Sure, it'll be rigid, but it'll still flex the same way. I've been through all this before.
Plastic isn't for optics. For something like a focuser holder, fine—but anything in the optical path? Forget it.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
UrmasXReply to Oleg Novoselov
This is not just plastic filled with carbon for printing, but genuine carbon fiber composite, made from oriented carbon fibers and epoxy resin. Its coefficient of thermal expansion along the fibers is close to zero.
Reply

Sign up or sign in to leave a comment.

RegisterSign in
Oleg NovoselovReply to UrmasX
If you mix carbon fiber with plasticine, it's still plasticine. The same applies here—it's still a PLA carrier or something similar. Of course, the stiffness will increase, but the CTE and all masses will be larger.
Reply

Sign up or sign in to leave a comment.

RegisterSign in

More photos by UrmasX