Outside with eyepieces.

[nederman63]

This again may seem a daft question. I have taken the advice I read on here about taking your scope outside for 30 minites or so before you use it, do you need to do this with your eyepieces as well?

[Moonshane]

hi there

I don't believe it's required, in fact maintaining them just above ambient is preferable as they steam up less. I suppose with huge eyepieces (Nagler 31mm, Ethos etc) there might be some advantage to cooling them but I have never seen it and many people use heat strips to retain the above ambient temperature.

[nederman63]

Thank you, something else I have learnt.

[steveb1977]

I find that the eyepieces dew up quickly if too cold. Always keep then in a pocket when their not being used.

[John]

I keep my eyepieces (including the big guns !) a bit warmer than the outside temperature. The foam in the eyepiece case seems to retain the heat a bit if I keep the lid down in between changing eyepieces.

If eyepieces get too cold the heat of your eyeball can cause them to fog which is very frustrating.

[jason.p]

I also keep mine in my pockets, in bubble wrap envelopes to keep the dust off (there always seems to be brickdust in all my pockets ). One problem is remembering which pocket has which eyepiece, but if you stick to some sort of system it soon becomes easy.

[glowjet]

Keep in the pocket, retained in one of those drawstring pouches that photographic outlets supply for lenses, this way if the caps come off, your precious eye piece wont come into contact with any residual grit that might be present, Baader have already thought of this as they supply such a pouch with each their Hyperion series

John.

[M4lcs67]

Yep. Keep in pockets. Just make sure you don't have a load of fluff in them otherwise it will contaminate the eyepieces.

[SpaceWatcher]

I agree, keep 'em a bit warmer, I use pockets and eyepiece/equipement case to keep them above ambient. When I started, I used the eyepiece holders built into my trypod and found that they fogged up quicker when cold (especially as there's damp in the air a lot of the time here just waiting to condense out).

[Guy Wells]

Interesting. I keep mine in the tripod tray. Same temp as the scope. Never had any problems with fogging. But what would I know eh?...

[RikM]

I keep them in my EP case with the lid shut as much as possible. This seems to stave off dewing up.

[faulksy]

i put a heater on my diagonal this keeps even my 28mm nirvana dew free

[twotter]

I'm another case user, though I do forget to close the lid sometimes. My EPs do sometimes fog up so maybe I should try and remember to close the lid more often!

[LukeSkywatcher]

In your pocket with the caps on until ready to use them is the best. I have a case for mine and that is as good as in your pocket if you remember to shut the lid of the case.......