Sol 30-12-2019 Ha

[Ibbo!]

New ITF and I think the image looks a bit smoother.

 

Might need a click or 3 for full res

 

 

 

 

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[GreatAttractor]

Looks great & uniform. What's the telescope?

[PhotoGav]

Looking good. What’s an ITF?

[Sunshine]

Wonderful image, so sharp and uniforn as mentioned above.

[David Smith]

Awesome Steve

[Merlin66]

The ITF (Induced transmission Filter) is usually the filter element placed before the final narrowband blocking/ sort filter in an Ha set-up.

These are subject to failure.....luckily we found a suitable replacement from Maier Optronics.

 

[Ibbo!]

1 hour ago, GreatAttractor said:

Looks great & uniform. What's the telescope?

60mm Lunt double stacked with a Coronado rich tuner 1200 blocking filter and a point grey research chameleon cam.

Gathered with Genika stacked with AS3 processed using ImPPG (thank you very much) and photoshop

36 minutes ago, PhotoGav said:

Looking good. What’s an ITF?

Its the blue filter before the blocking filter - it can go cloudy

[Ibbo!]

2 minutes ago, Merlin66 said:

The ITF (Induced transmission Filter) is usually the filter element placed before the final narrowband blocking/ sort filter in an Ha set-up.

These are subject to failure.....luckily we found a suitable replacement from Maier Optronics.

 

Mine was supplied by Lunt.

Next stop will be a Maier.

[Merlin66]

For completeness:

Coronado use the ITF (or Maier equivalent), Lunt went for a Blue Schott BG 38 filter - unfortunately they both can fail....

The Maier replacement has been used by MANY solar observers over the past seven years and I'm not aware of any failures!

 

[Pete Presland]

Very nicely captured.