Refractors vs Binos

[amzolt]

I posted this in "Observational Astronomy" but it might be better(?) here:

I have Celestron's 25x100 binos.

I'm using the Virtual Moon Atlas by Legrand.

In the Information area there's a listing for Minimal Instrument.

Most of the features I can see easily have 50mm refractor as the Minimal Instrument though I'm training my eye (slowly) to see smaller features.

How can I compare the mm refractor ratings to my 25x100s?

[dannat]

I forget the conversion factor but a bino will show 25-50% more than a refractor of the same size objective. i think a 50mm bino = 76mm refractor. However the magnification is something you can go up in a refractor but not in a bino. Your 25x100 should be able to see the luna stuff alright - they are pretty big. I would try 80mm refractor settings to see how it compares

[amzolt]

Thanks!

I'm really enjoying the 25x100s and looking forward to getting an 8 or 10" Dobsonian...

[erick]

Sounds like a familiar path :whistle:

[amzolt]

Really? Cool!:whistle:

[erick]

Yes, 'Twas my path, but I kept the 30x100's when I moved to scopes. Have since moved from 8" to 12"!

[amzolt]

Oh, yes; definitely going to keep my 25x100s--they've become a good friend!!