Telescope opinions/recommendations

[Nightspore]

1 hour ago, Razz said:

Is this a decent filter or should I put more money into a significantly better one? I very much enjoy this hobby and I'm not opposed to buying better things if I need to...

 

https://www.amazon.com/Telescope-Contrast-Narrow-Bandpass-Filter/dp/B01L8XXZHC/ref=sr_1_28?crid=168OF7SYEFCEM&keywords=oiii+filter+1.25&qid=1644541951&sprefix=oIII%2Caps%2C127&sr=8-28

 

'Gosky' is a generic name. 

 

 

On the UK Amazon site 'Gosky' suggest that it's a narrowband filter. Which I very much doubt for 35 quid. Ultra High Contrast filters are generally marketed as two types. The first type is a broadband filter which lets through a broader range of light. A good example of these is the Orion SkyGlow. David Knisely review. I find the Explore Scientific OIII and Orion SkyGlow can be used up to a 1.5mm exit pupil (exit pupil = eyepiece focal length/telescope focal ratio). 

 

 

The second type of UHC or OIII filter are narrowband. The Orion UltraBlock is a narrowband filter.

 

 

These pass much narrower bands of light and so a larger exit pupil will be required. Ideally between 3 to 7mm. 

 

 

With broadband and narrowband filters 'yer pays yer money and takes yer choice' as they say. Lumicons are pricey. Astronomik are good. The Baader/Celestron OIII is a good narrowband. The Orion SkyGlow and UltraBlock filters are good for the money.

Edited February 11, 2022 by Nightspore

[Nightspore]

10 hours ago, Stephen Waldee said:

This thread is FUN!

 

 

 

One size fits all.