Quote:
Originally Posted by Peter Ward
For imaging, the isoplanic wave (ie block of air that is stable across the aperture of your telescope) needs to be larger to appear stable in larger apertures....but the rub is, the refractive index changes for these waves are often directly proportional to their wavelength.
Smaller apertures as a result often have a more optimum (ie smaller) refractive index changes.
What is intestesting is that high speed tip-tilt optics did not exist for amateurs back in 1971, and (without trying to sound like an advert) these can and do correct slow seeing changes that were impossible to compensate with film based systems.
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I remember reading about the relative size of those so called 'air cells' at high altitude having to be bigger than the aperture of your telescope, hence the bigger aperture, the bigger the chance to capture one of more of those wobbly buggers in your field.
Do you think the active optics technology is close to make it to the consumer market? I see Edmond Optics is selling kits of such small mirrors but it's still very involved and pretty hands on. (Hardware, soldering/wiring, software SDK, etc...)