Can someone please check my algebra?

[michaelmorris]

I'm giving a talk later this month and I've had sudden crisis of confidence (probably well founded) about my ability to perform basic algebra. Is this formula correct?

For visual observing

Actual field of view (deg) = (eyepiece field of view (deg) x eyepiece focal length) / telescope focal length.

Is this correct?

Thanks

[johnoelliott]

Looks correct to me

[michael.h.f.wilkinson]

This correct because it is effectively apparent field of view divided by the magnification

[Stu]

Yep, looks good. There's also the alternative way using field stop at the bottom of this list...

[steppenwolf]

... and to me!

[YKSE]

Yes, it looks right to me. The last formula in Stu's comments is said to give better precision though.

[michaelmorris]

Thanks

[kev]

Yep thats right

Sent from my iPhone so excuse the typos!

[bingevader]

Best of luck with the talk.