Cave to Wizard via Bubble

[martin_h]

Managed to join these up last night, now to fill in the gaps!

12 panels so far.

[Catanonia]

Looking good mate

What is each pane Focal Length ?

[martin_h]

Here's a better version - converting it to JPEG messed it up a bit...

Its the ED80pro with .85x reducer so about 510mm?

[AstroLuke]

Im kinda new to astrophotography. Why is the image black/white?

[garethmob]

u can get many different types of CCD cameras the one shot colour ones and mono ones

to get colour out of a mono camera filters are used and each set of frames on each filter is joined together

[martin_h]

Also I'm using an Hydrogen Alpha filter on the camera which would produce a red colour on a colour camera, so I'll shoot it in black and white and add colour later (perhaps)

[Catanonia]

Im kinda new to astrophotography. Why is the image black/white?

Martin is using a Ha filter on a mono camera. Ha is narrow band and one of the 3 normal filters for narrow band you would use to create a colour image.

Same with all mono CCD cameras, you take red, green and blue, each in mono and combine them to produce a colour image.

Ha Hydrogen Alpha, OII, Oxygen and SIII Sulphur (i think) are the normal narrowband filters used.

You can get colour CCD cameras that do all three filters at once, but they tend not to be as sensitive or flexible.

Hope that helps