Quote:
Originally Posted by Stefan Buda
Peter,
If you need it to determine the optimum spacing on a particular optical train, why don't just borrow it and then have a custom spacer made. A simple spacer can be made to very accurate specs with no wedge error.
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Ah...if life were so simple. I use multiple OTA's, field correctors, filter wheels and cameras. I can usually get with +/- 3mm using stock parts...and have a custom spacer or two to get within 1mm. A rigid spacer that I can adjust and assess optically would be extremely helpful....