Stacking Barlows?

[idbvideo]

I have a couple of 2x barlows, one I bought for my previous scope and one that came with my new SW200P.

If I fit one barlow into the focusser and then fitted the other into the first barlow, will it work? and does it equate to a 4x barlow?

[Capricorn]

Should work but not sure how well, the focal length will have been increase by 2 barlows that are/were designed to work with just the single objective.

Catch is that not only do you increase the focal length you are also increaseing the various errors that come with the barlows. These will increase quickly.

As you have the 2 you could give it a try.

[malc-c]

I use a Astro revelations 2x barlow stacked with the stock SW 2x barlow that came with my 200P and it works reasonably well when capturing video with a webcam

Probably get better results with a decent 4x barlow ?

[idbvideo]

Great photo.

Ok so the idea is not crazy then.

Maybe I might get a 3x barlow then I can do 2x 3x 4x and 5x

Thanks guys.

[malc-c]

5x will be pushing the 200p. 4x is a pain to focus !!

[Clouder]

Would I be correct in assuming the better outcome would be, say, a 2x barlow and a 6/7/8mm EP instead?

[LukeSkywatcher]

Would I be correct in assuming the better outcome would be, say, a 2x barlow and a 6/7/8mm EP instead?

I have tried a 2X barlow on a 200mm scope with a 4mm,6mm and 8mm EP and the only happy outcome was with the 8mm EP.

[Clouder]

That's reassuring as I think I'm about to buy an 8mm BST

[LukeSkywatcher]

8mm is fine on its own for observing planets.