Jump to content
  • Join the online East Midlands astronomy club today!

    With active forums, two dark sites and a knowledgeable membership, East Midlands Stargazers has something for everyone.

300x zoom.


Daz Type-R
 Share

Recommended Posts

Hi all.

Is 300x zoom in this country pushing it (on average - I know on the very rare occasion we do get nice clear skies)?

Cheers,

Daz.

Link to comment
Share on other sites

x50 mag per inch of aperture is the maximum you can use, but that depends on so many factors such as good seeing, dew, collimation, etc.

So in theory your 8" scope should be capable of x400 but you might be able to use that once a year on that exceptional night.

Link to comment
Share on other sites

Cheers Mick, I knew the top range of my scope was 400x but did not mention that cause I thought I would never be able to use that in this country. So assuming dew and colimation is not an issue, the only thing stopping me using 300x zoom would be the seeing conditions, would I get much use at 300x then do you think?

Link to comment
Share on other sites

I used to use x457 with my 16" dob on the moon quite a lot but then thats just over half of it's maximum magnification.

Use it on the moon, splitting binary stars and and hunting out those very elusive globular clusters.

Link to comment
Share on other sites

The max I have used out on Crete is x254. That is from my villa with minimal LP, talking about a small street light a couple of hundred yards away. The biggest problem I have is with ground heat thermals.

Link to comment
Share on other sites

I used to use x457 with my 16" dob on the moon quite a lot but then thats just over half of it's maximum magnification.

Use it on the moon, splitting binary stars and and hunting out those very elusive globular clusters.

It's those elusibe globular clusters and the moon that I had in mind.

The biggest problem I have is with ground heat thermals.

Not a problem in "sunny" Nottingham!

Link to comment
Share on other sites

Whack up the magnification on M13 in Hercules, when you can get it, it's stunning, just like a firework going off.

I did that at 5mm on mine which is 300x, pretty much at it's limit with bright objects.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.