3nm SHO Filters with test report from Altair Astro

[altair_astro]

Hi Guys, haven't posted in a while here! Hope you're all hale, healthy and enjoying the skies.

We have new product to mention:

Altair 3nm SHO filters in 2" size for mono CMOS or CCD imaging

Available individually or as an SHO bundle.

Features are:
3nm FWHW , centred on the CWL at F4.8 or slower
90% transmission at CWL
0.01% transmission off-band visual wavelengths
UVIR blocking
Anti Halo coating. We've never seen a halo with these filters in Beta and mainstream, even on Vega.*
Test report - individual for each filter.

You can see the results with the Altair 3nm filter for yourself in our Facebook group.

You can order from:
USA: Land Sea and Sky in Texas
France: Pierro Astro
Germany: APM Telescopes
Worldwide: Altair Astro (put it in the shopping basket, choose country for total price)

[chris_g]

* I have no idea how to attach an image to this but I have pics to share!

Hi,

Switch to the full editor then scroll down until you see options and attachments, it's below the save, preview and submit buttons.

Clear Skies!
Chris

[altair_astro]

thanks Chris I edited the post and found a way to use BBCode as full editor isn't available when editing.

[yobbo89]

very nice, will you be doing a 5nm ha filter ?

[altair_astro]

Hi there, @yobbo89 we already do a 7nm filter, here's the set: https://www.altairastro.com/altair-2-pr ... -310-p.asp

We could do a 5nm but it wouldn't be much cheaper than the 3nm.

Is there a reason you need 5nm specifically? Maybe a faster F-Ratio than F4.8?