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April 5, 2017 Greg Bragg

NEAF 2017 - On our way...

Explore Scientific is heading towards the Northeast Astronomy Forum in Suffern, NY with Barbara Jean the Vintage Airstream.

Greg Bragg, Jerry Hubbell, and Scott Roberts will be there and we are super excited to show you new Explore Scientific and Explore FirstLight telescopes, new waterproof eyepieces, and the new EXOS II with the recently released PMC-Eight GOTO system.

Thank you for following our adventures! If it's not too much to ask, please hit like on the Explore Scientific USA FB page at: https://m.facebook.com/ExploreScientificUSA/?ref=bookmarks

Attend the 2017 NEAF: http://www.rocklandastronomy.com/neaf.html

Learn more about Explore Scientific at http://www.explorescientificusa.com

#2017NEAF #neaf #astronomy #telescopes #eyepieces #microscopes#binoculars #airstream #vintageairstream #explorescientific

Filed in: NEAF
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Comments

dave - September 20, 2017

Hi, I want to get the back focus correct between my new 3" ES 0.7X Reducer / corrector, and my camera’s sensor. Gerry H says the BF is 55mm, but what is the reference point on the reducer/corrector from which this is measured? Is it the center of the rear glass element, the edge of the rear element, the inside shoulder of the female rear threads, or the rear-most metal edge of the lens barrel? Thanks

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