TheSkySearchers

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)

altair_astro wrote: ↑Fri Aug 05, 2022 4:04 pm * 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

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

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

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?