Eye relief....

[PeterW]

As I (currently) don’t need glasses when observing sometimes eyepieces with long eye relief are hard to use, trying to hover my eye in the right place. Suffered from this with some cheap 40mm plossl I got for an experiment. So I’ve added some 15mm extensions (and my bike inner tube patent winged eyecups) so I can use them far more easily and block straylight nicely.

 

Peter

[Armand Popa]

Great idea, thank you!

[PeterW]

Needed doing, if your eye is too close the field edges shrink and go all fuzzy. I am sure when I need glasses I will welcome the extra eye relief.... but not yet.

Just need to print t meh other spacer now I know the thickness I needed.

Peter

[PeterW]

Remixing gryzbu updated eyecups from here...
https://www.thingiverse.com/thing:1560347

with a little lateral offset so my eyes can be centred results in....

 

works a treat..

 

Peter