Fov skywatcher 9x50 raci?

[craigfoot]

Am I correct in thinking it's 5.6 degrees?

Just got my copy of sky and telescope sky atlas and trying to work out what I'd see in the finder. 5 degrees seems to suggest I'd see a lot more than I do?

If anyone's interested the pre cut hole in a small malteasers box works out at 5 degrees so makes a good guide for this :-)

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[Qualia]

Hiya Craig,

You could measure it directly by timing the transit of a star across the full field of view. Here is a little guide on how to go about it.

The general acceptance of the RACI’s field of view is somewhere between 5 to 5.6 degrees but it is worth pointing out that the often quoted FOV and actual FOV aren't always the same thing, so maybe 5.6 in theory means 5.1 in practice.

[craigfoot]

Thanks. . I think I'll go with the approximate of 5 degrees and have a look next time I got the scope out to see if I can work it out more accurate though I think an approximate idea will do as a guide

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[Charic]

Flo  website sponsor  states...... AFOV 45° TFOV 5.6°

[laudropb]

I did a star drift with mine which resulted in 5.6, so I guess that confirms it.