Aperture mask

[The Warthog]

This is a picture of an aperture mask I made one day while I was waiting for the vegetables to come to a boil:

The circle fits the outside diameter of the OTA. I keep an elastic around the top of the tube, and when I put on the aperture mask, I tuck the tabs under the elastic, to hold it in place.

Later this winter, when I have time, I'm going to make one with two holes opposite each other. This will be a Hartmann mask, and will be a focusing aid.

If I can find it again, I'll post the solar projection screen I made from the corner of a cardboard box. I think my wife may have thrown it out, though.

[Jamie]

Warthog

When you make the Hartman mask try making it using 2 triangles cut out

instead of 2 circles this is supposed to be better and more accurate.

[daz]

Amazing what can you do with a few peas and carrots!! :clouds2:

[The Warthog]

Warthog

When you make the Hartman mask try making it using 2 triangles cut out

instead of 2 circles this is supposed to be better and more accurate.

I've seen those but I'm too much of a klutz to cut good triangles quickly. I'd probably have to wait until I was cooking a roast.

[daz]

Not a rarity at all.

Most men can multi-task. We just don't advertise the fact......

[Jamie]

Not a rarity at all.

Most men can multi-task. We just don't advertise the fact......

What did you go and tell her for.......

If she tells my wife your for it boy.

[daz]

Nah, you're safe. Just tell the wife that Caz is an astronomer and she'll just mutter "Anorak, nutter, blumming loonies" and all will be well!!!

[Jamie]

Hope so. :clouds2:

[The Warthog]

Goodness me, a man who can quite clearly multi-task....a rarity!

Caz :sunny:

Well, yeah, but I still can't pat my head and rub my belly at the same time!

[Jamie]

Well, yeah, but I still can't pat my head and rub my belly at the same time!

Thats nothing i can walk and chew chewing gum at the same time.

[The Warthog]

Tes, but can you THINK and chew gum at the same time?

[Jamie]

:clouds2: