A noob question about zoom lens 75-300mm

here's a simple question
by using point n shoot sx40hs, it 's 35x zoom is way cool to capture the moon.
Just wanna ask how much a 75-300 zoom lens would capture.?
have never used one. want to try it.
can i capture moon with it? just like sx40hs point n shoot ?
will it give equivalent quality?

You can capture the moon with ANY lens. It's just an issue of how big it will look in the image and how sharp it will be. If you want the moon to fill at least half of your sensor height, you need to get up to around 600-700mm focal length on a crop (more on ff). I like the image scale when I hang my T1i on my 1380mm telescope: the moon fills about 3/4 of the image height with no croppping.

archer1960 wrote in post #14930150
You can capture the moon with ANY lens. It's just an issue of how big it will look in the image and how sharp it will be.

I agree, (and don't get the 75-300!)
if you want an inexpensive but good telephoto look at the 55-250IS

watt100 wrote in post #14930189
I agree, (and don't get the 75-300!)
if you want an inexpensive but good telephoto look at the 55-250IS

I totally agree with this, the 55-250 is much better with IQ which will help you with cropping the moon images.

the sx40HS gives you a 35mm equivalent of 840mm...a 300mm lens mounted to a crop camera will give you 480mm...so you'll be quite a bit shorter than with the P&S...

So , you guys are suggesting 55-250 mm right?
Any other suggestions please.
what are the other cheaper options?
(i dont understand much of this thing, but 75-300mm sounds more length then 55-250 , please explain how is it better )

ekfaysal wrote in post #14931494
So , you guys are suggesting 55-250 mm right?
Any other suggestions please.
what are the other cheaper options?
(i dont understand much of this thing, but 75-300mm sounds more length then 55-250 , please explain how is it better )

it's better because it offers, IS is newer, and has better optics...

the difference between 250 and 300 isn't hugely substantial...

assuming you are using it for other things than just shooting the moon the 55-250IS is probably the best lens you can get sub $400

ekfaysal wrote in post #14931494
So , you guys are suggesting 55-250 mm right?
Any other suggestions please.
what are the other cheaper options?
(i dont understand much of this thing, but 75-300mm sounds more length then 55-250 , please explain how is it better )

The 55-250mm is pretty much the cheapest, most cost effective telephoto lens you can get. They go for $150 all the time.

The 75-300mm really isn't much cheaper, so you are not saving money and the image quality is not as good even if the focal length is slightly longer.

The suggestion of the 55-250 mm IS is because that lens yields much better image quality as compared to the 75-300mm. This is especially true abouve 200mm focal length where some people find the image very soft.

But to your question concerning taking moon shots..., neither lens will give you the image of the moon as when you use the P&S you reference. See the answer by DreDaze in which he states "the sx40HS gives you a 35mm equivalent of 840mm...a 300mm lens mounted to a crop camera will give you 480mm...so you'll be quite a bit shorter than with the P&S."