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Elimination of Mirage 🤔 (1 Viewer)
- Thread starter SuperDuty
- Start date
Firstly, I don't think this post is allowed on Birdforum.
But the Moderators decide.
Mirage can be reduced by apodising screens, tube material, tube colour, air spaces within the optical tube, tube sizes.
Also optical design and f ratio.
As to this particular advert, I find it to be, as with many ads, just words with possibly a tiny part truth and mostly sellers talk.
As to sample variation, this is a given.
I doubt the claimed truth regarding heavy mirage.
How heavy, how measured?
B.
But the Moderators decide.
Mirage can be reduced by apodising screens, tube material, tube colour, air spaces within the optical tube, tube sizes.
Also optical design and f ratio.
As to this particular advert, I find it to be, as with many ads, just words with possibly a tiny part truth and mostly sellers talk.
As to sample variation, this is a given.
I doubt the claimed truth regarding heavy mirage.
How heavy, how measured?
B.
has530
Well-known member
There is a way to eliminate/reduce mirage. It is called adaptive optics. What op shared reads more like marketing fluff.
Adaptive optics was or is available commercially.
Fairly inexpensive.
There is an Italian firm I spoke to and the quote was about £15.000 plus for a bespoke system using a streetlight or a house light at 50 or 60 Hz instead of the normal laser for viewing an eagles nest at one mile plus.
They had some experience with terrestrial systems, but mainly with astro scopes.
But it needed a PhD person to set it up.
Their system is used on the 1 metre telescope near Nice in France and their Mars photo is amazing.
It was used in the 1970s and maybe earlier on the Big Bird satellites to give 4 inch resolution at 250 miles.
It was probably classified then.
Whether the cheap systems are worth it on a 2 inch aperture is questionable, but it might be.
Regards,
B.
Fairly inexpensive.
There is an Italian firm I spoke to and the quote was about £15.000 plus for a bespoke system using a streetlight or a house light at 50 or 60 Hz instead of the normal laser for viewing an eagles nest at one mile plus.
They had some experience with terrestrial systems, but mainly with astro scopes.
But it needed a PhD person to set it up.
Their system is used on the 1 metre telescope near Nice in France and their Mars photo is amazing.
It was used in the 1970s and maybe earlier on the Big Bird satellites to give 4 inch resolution at 250 miles.
It was probably classified then.
Whether the cheap systems are worth it on a 2 inch aperture is questionable, but it might be.
Regards,
B.
