what is a diascope?

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   I'm new to optics so bear with me, but what  is a diascope?

I've looked everywhere for some form of definition and finally had to
register here just to ask since I can't find any info aside from
product descriptions, none of which say what the heck makes a diascope
a diascope.

Thanks for your help!

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pickles Members Profile Send Private Message Find Members Posts Add to Buddy List Optics GrassHopper Joined: November/06/2009 Online Status: Offline Posts: 2	Quote Reply Topic: what is a diascope? Posted: November/06/2009 at 09:06
	I'm new to optics so bear with me, but what is a diascope? I've looked everywhere for some form of definition and finally had to register here just to ask since I can't find any info aside from product descriptions, none of which say what the heck makes a diascope a diascope. Thanks for your help!

JGRaider Members Profile Send Private Message Find Members Posts Add to Buddy List Optics Apprentice Joined: February/06/2008 Online Status: Offline Posts: 206	Quote Reply Posted: November/06/2009 at 09:14
	A diascope Is Zeiss' brand of spotting scopes. Search on this site for more info.

pickles Members Profile Send Private Message Find Members Posts Add to Buddy List Optics GrassHopper Joined: November/06/2009 Online Status: Offline Posts: 2	Quote Reply Posted: November/06/2009 at 09:38
	I have searched on this site and nobody says what one is. I assume Zeiss is calling them diascopes for a reason, right?

JGRaider Members Profile Send Private Message Find Members Posts Add to Buddy List Optics Apprentice Joined: February/06/2008 Online Status: Offline Posts: 206	Quote Reply Posted: November/06/2009 at 11:29
	Try this link, or copy and paste: http://swfa.com/Zeiss-Spotting-Scopes-C501.aspx Edited by JGRaider - November/06/2009 at 11:30

jonoMT Members Profile Send Private Message Find Members Posts Add to Buddy List Optics Journeyman Joined: November/13/2008 Location: Montana Online Status: Offline Posts: 561	Quote Reply Posted: November/06/2009 at 12:20
	Because they were designed by Portuguese optics engineer Jose Dias to be used during the day (dia) and were based on research performed on dialysis patients.
	Clean what's dirty, tighten what's loose, oil what turns and keep all the pieces. - Lyndel Meikle

Terry Lamb Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Optics Apprentice Joined: January/19/2009 Location: Sagle, Idaho Online Status: Offline Posts: 75	Quote Reply Posted: November/06/2009 at 13:22
	And, furthering research done by JonoMT above, I found the following quote from a patent which definitely clears it up for me: "diascope switch means operably connected with an output of said comparison amplifier means for selectively by-passing said iris driving voltage to ground, for disabling said iris driving circuit."
	Terry Lamb