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what will be the configurations for a simple 80x telescope?
i need to optimize it to the maximum resolution.
i need to optimize it to the maximum resolution.
You are quite right. The only truly important thing is aperture, the rest is just details in comparison. Important details mind but details nevertheless.I don't think the f-ratio has anything to do with resolution of the image except in the fact that slower f-ratios tend to have less aberrations in the lenses and mirrors since they are curved less sharply than faster f-ratios. Perhaps I'm misunderstanding something, Dave?
You are quite right. The only truly important thing is aperture, the rest is just details in comparison. Important details mind but details nevertheless.
So, you are saying a home made refractor is an easy project? I disagree.
I agree with you Dave. It's been my experience that longer focal lengths give better resolution but only when you compare radically different focal lengths like you have at 4.5 vs. 10. But f6 vs f8? That's more dependent on aperture and quality. Quality probably more than anything.
Here is a step by step build for a 127mm telescope. Here is one for a 60mm f16.7.
There is nothing simple about making a refractor primary. You have two surfaces to grind and polish for each lens and you need no less than two lenses to construct a useful primary. That is a lot of grinding and polishing, and, I haven't even addressed test stand issues. You also end up with four surfaces that need coated. Its no accident large refractor primaries are expensive.
first you need to decide if you want to build a refractor --- lenses only or a
reflector --- mirror and lens ( eyepiece) mix
in general, the larger the f ratio the greater the resolution eg f10 higher res than f5
Dave
what will be the configurations for a simple 80x telescope?
i need to optimize it to the maximum resolution.
I hand ground an 8 inch Newtonian for a college physics project. Definitely a lot of of hard work. Afterward, I took it to the Adler Planetarium in Chicago where they put the coating on.Back in seventies there was a hobbyist club in Warsaw where they were grinding manually their own mirrors for Newtonian telescopes. I believe their estimates were around 2000 hours of work for the 150 mm telescope (but I admit I am not sure if it was just grinding, or everything combined). Eyepieces were bought separately, mirrors were sent for coating in some industrial settings.
Technically process is not that complicated, if memory serves me well number of scopes they made was counted in hundreds. And from what I see there are tutorials on the web. I am far from saying it is trivial, but it is definitely a possible DIY project.