M17 Ha Uv

[hasty kayak]

2 hrs on this total.
2 variants, I likes the blue one more

[tough lintel]

I like the green one. Looks goofy but unique 😲

[hasty kayak]

Thank you, blackmetal man lol

[tough lintel]

You're welcome

How did you shoot UV?

[hasty kayak]

Using a uv 300-400nm filter off of aliexpress, and flats using sunlight lol

Luckily no microlensing in this image, but some are terrible, also I think uv diffracts around the secondary mirror too

[tough lintel]

I noticed that microlensing happens more often with IR

[hasty kayak]

Luckily I've never had it happen in nir, just uv

[terse flume]

The glass is actually the issue with UV, UV light HATES glass.

My Edge HD can't even see in UV due to the amount of glass in the system.

(Need to get an RCT or CDK 🤣)

[tough lintel]

@hasty kayak isn't IR also blocked by glass? I know that thermal cameras can't see trough glass. I know is different wavelengths but you know...

[terse flume]

Oh, it depends on the glass.

Most coatings on glass used in most astrographs is not optimized for wavelengths below 380nm, or above 950.

[tough lintel]

That's why newtonians are 👑

[terse flume]

Newtonians require correctors, so the real king is the RCT

CDK's have correctors that are good from 250 to 1500nm, and the IRDK that planewave offers is good clear up to 3500+ due to the gold mirrors

The hierarchy kind of goes like this:

Korsch / 3 Mirror Astigmat > RCT >= CDK > Classic Cass > Newt > EdgeHD/Aplanatic SCT > Maksutov > Refractor

[tough lintel]

Well... I have one kidney left. My liver is questionable and I'm a smoker so a lung is out of the question. Plane Wave looks good for those that can afford it😂

But I did have an Omegon RCT on my bucket list. Now is the 10" RCT from TS optics... whenever that day arrives

[tough lintel]

The mak... idk, I've seen people shooting cool stuff with them, but for me is still a Wallmart OTA

[hasty kayak]

I wants a fast large newt...

Dual or triple rig one 🤣

[hasty kayak]

From camera to camera it'll depend ,I'm a mono 533 and it doesn't have the uv ir blocking filter ,I dunno if color does. transmission through the cc hasn't been a problem for me

Some targets have some really great signal

[terse flume]

They're all GSO mirrors, just save your money and wait for a new company to put them out of business or something like that.

[terse flume]

Maksutovs are sharper than newtonians if you get the right ones. Astrophysics 10" is a prime example.