The difference between achromat and apochromat lens is basically in different chromatic aberration. If you are interested in astronomy, the mentioned chromatic aberration is the cause of the unappealing purple halo appearing around observed bright objects. So, while achromat lenses bring just two colors into focus, apochromats bring three, usually red, green, and blue.
Using these better lenses, or ED, extra-low dispersion lenses, significantly reduces this purple halo, or glare effect, allowing you far better observing experience. You will get really far better performances with one good quality apochromatic telescope, compared to achromatic one, with sharper images, and this is especially important when observing or taking photos of bright starts and planets.
Visiting some astronomy club in your neighborhood might be a good idea for anyone who doesn't have much experience with this. Taking a good look first might make you realize what you will actually get with different types of telescopes. Although good quality equipment definitely costs more, it's something you should invest in, because it gives you far better observing experience.
In any case, make sure not to buy something cheap from the supermarket. This would be only a waste of money. But, in case you are serious about your interest in astronomy, it is advisable to buy something that you will be able to use and enjoy. Maybe it would be a good idea to find someone with similar interests and get a few bits of advice first. Maybe it would be nice to have a look or two at the stars as well, before making your decision.
In any case, the minimum you should search for is one compact APO 4'' refractor. It is small enough to be portable and gives satisfying quality when observing stars and planets, and even darker objects. This one might be the best balanced buy for astronomy hobbyists, ready to invest in good quality, but unwilling to spend enormous amounts of money at the moment.
If you are serious about your interest in astronomy, buy yourself something you will be able to use. Sometimes it is possible to buy something worthy at an affordable price but, generally, you will probably get as much as you are ready to pay for. On the other hand, even if you are willing to spend more on some larger pieces, make sure you will be able to transport and assemble this equipment easily. It's another factor you should keep in mind.
It was mentioned before that achromatic models have problems with halo, or glare effect. This is reduced on larger f-numbers. For those of you who aren't familiar with this, the f-number is lens diameter divided by focal length. Since this type is more affordable, it can be used as the first choice for your children, for example, when they show the interest in astronomy.
In any case, it is up to you. Depends on your interests, the amount of money you are ready to spend and so many other factors. In case you don't have any experience in this, find someone who has, or some astronomy club in your area. Find out more about this field and about different types of equipment, before making your final decision.
Using these better lenses, or ED, extra-low dispersion lenses, significantly reduces this purple halo, or glare effect, allowing you far better observing experience. You will get really far better performances with one good quality apochromatic telescope, compared to achromatic one, with sharper images, and this is especially important when observing or taking photos of bright starts and planets.
Visiting some astronomy club in your neighborhood might be a good idea for anyone who doesn't have much experience with this. Taking a good look first might make you realize what you will actually get with different types of telescopes. Although good quality equipment definitely costs more, it's something you should invest in, because it gives you far better observing experience.
In any case, make sure not to buy something cheap from the supermarket. This would be only a waste of money. But, in case you are serious about your interest in astronomy, it is advisable to buy something that you will be able to use and enjoy. Maybe it would be a good idea to find someone with similar interests and get a few bits of advice first. Maybe it would be nice to have a look or two at the stars as well, before making your decision.
In any case, the minimum you should search for is one compact APO 4'' refractor. It is small enough to be portable and gives satisfying quality when observing stars and planets, and even darker objects. This one might be the best balanced buy for astronomy hobbyists, ready to invest in good quality, but unwilling to spend enormous amounts of money at the moment.
If you are serious about your interest in astronomy, buy yourself something you will be able to use. Sometimes it is possible to buy something worthy at an affordable price but, generally, you will probably get as much as you are ready to pay for. On the other hand, even if you are willing to spend more on some larger pieces, make sure you will be able to transport and assemble this equipment easily. It's another factor you should keep in mind.
It was mentioned before that achromatic models have problems with halo, or glare effect. This is reduced on larger f-numbers. For those of you who aren't familiar with this, the f-number is lens diameter divided by focal length. Since this type is more affordable, it can be used as the first choice for your children, for example, when they show the interest in astronomy.
In any case, it is up to you. Depends on your interests, the amount of money you are ready to spend and so many other factors. In case you don't have any experience in this, find someone who has, or some astronomy club in your area. Find out more about this field and about different types of equipment, before making your final decision.
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