#1  
Old 11-01-2019, 09:30 PM
Ukastronomer (Jeremy)
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TWO questions please

1. It took me a while to see that the forum (to me) was "upside down, with the latest replies at the top and the oldest at the bottom............ but why can I not always locate the "first" post to a thread


2. Please see attached.

You can get "Bahtinov" masks we all know, but can anyone remind me please of the name of the one that has three holes in that merge into ONE image when correct focus is achieved.

Thanks
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  #2  
Old 11-01-2019, 11:49 PM
Saturnine (Jeff)
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Could be an Hartman Mask if I'm not mistaken.
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Old 12-01-2019, 01:22 AM
Ukastronomer (Jeremy)
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Quote:
Originally Posted by Saturnine View Post
Could be an Hartman Mask if I'm not mistaken.
YES! thank you

Now I can look up how to make one
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Old 12-01-2019, 01:47 AM
raymo
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You can make one with two holes.

Go into your control panel, click on edit options, the last section on the page will allow you to
change to oldest post first.
raymo

Last edited by raymo; 12-01-2019 at 02:07 AM. Reason: correction
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  #5  
Old 12-01-2019, 02:21 AM
Ukastronomer (Jeremy)
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Quote:
Originally Posted by raymo View Post
You can make one with two holes.

Go into your control panel, click on edit options, the last section on the page will allow you to
change to oldest post first.
raymo
Thank you
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  #6  
Old 12-01-2019, 07:18 AM
Wavytone
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Hartmann masks have any number of holes you like, any size, but all perfectly circular.
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