BBC Sky at Night Magazine

Steve’s top tip

- Steve Richards is a keen astro imager and an astronomy equipment expert

Can I use glasses while observing?

If you are simply short- or long-sighted then wearing glasses while observing won’t improve the view, as the focuser on your telescope or binoculars will do the same job as them. However, if you suffer from astigmatis­m there are advantages to wearing glasses, but your choice of eyepieces will be more limited. Wearing glasses puts your eye further from the eye lens of the eyepiece so you should choose eyepieces with a long ‘eye relief’. This is the distance from the last lens surface of the eyepiece to the eye, which still allows the full field of view to be observed.

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