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D.A.R.V (Drift Alignment by Robert Vice)

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#1 Charlie Hein

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Posted 06 January 2013 - 05:15 PM

D.A.R.V (Drift Alignment by Robert Vice)

By Robert Vice

#2 Scott in NC

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Posted 06 January 2013 - 06:58 PM

Very nice! Thanks for sharing that information, Robert. :applause:

#3 highfnum

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Posted 06 January 2013 - 07:07 PM

nice i going to try it

#4 Takashi

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Posted 07 January 2013 - 07:44 AM

Really cool! Will try this as soon as possible.

#5 Littlegreenman

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Posted 07 January 2013 - 02:56 PM

I don't do astrophotography, so I don't need this level of alignment. But, I do appreciate clever thinking!

LGM

#6 Raginar

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Posted 07 January 2013 - 11:41 PM

Robert,

You mention that the corrections would be different for a GEM and I guess I don't understand why that is so. Can you clarify?

BTW this is probably the best example I've found. The pictures really clarified what I'm looking for from my image.

Chris

#7 Traveler

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Posted 08 January 2013 - 05:23 AM

Robert,

You mention that the corrections would be different for a GEM and I guess I don't understand why that is so. Can you clarify?

Chris


+1

#8 Doc Bob

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Posted 08 January 2013 - 06:37 PM

Thanks Robert,
I keep reading posts/articles referencing "drift alignment". I understand what it is but not having a GEM go-to mount, I havn't really paid any attention to technique. This does help lots! I eventually will go the rout of a GEM mount for my refractors.

Good viewing!
Bob

#9 Maverick199

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Posted 09 January 2013 - 01:34 AM

That is an excellent idea, thanks. Hope someone or I try this out with a GEM and report results. Only wish I had dark skies.

#10 Lightning

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Posted 10 January 2013 - 08:32 AM

Cannot for the life of me thinking why GEMs should be adjusted any differently to a fork. Perhaps he means the actual adjustment knobs will be in a different place? No idea.

#11 Raginar

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Posted 10 January 2013 - 08:22 PM

Lightning,

I can't think of why it would be different either; minus the actual motions of the GEM. But you should figure that out when your "V" is bigger or smaller based on how you move it.

This is the best example I've seen though. I'm really glad he put it together since i was hoping to learn this technique this year.

#12 hcsceo

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Posted 11 January 2013 - 01:16 AM

Man I wish I had read this before I started my imaging run tonight. I'm definitely going to give it a go. I've been using PHD but this looks much easier.

#13 Jerry Hubbell

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Posted 11 January 2013 - 10:09 PM

This method has been around for a long time. I first discovered it several years ago as described by Dr James Hall. For a thorough explanation see:

http://www.minorplan...aralignment.htm

I also describe this method in my book and provide a complete procedure also in chapter 12.

http://www.amazon.co...actical-Astr...

#14 Raginar

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Posted 12 January 2013 - 12:45 AM

Hey Jerry,

Your explanation is good too! Thank you for posting the follow-up information.

#15 Jerry Hubbell

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Posted 12 January 2013 - 10:50 PM

Thanks Chris,

I meant to post the link to the original source... Jim Hall
http://www.physiolog.../hall/polar.htm

#16 astrnmr

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Posted 26 January 2013 - 11:29 PM

Hey all, thanks for the comments. Sorry it has taken so long to respond. GEM mounts function slightly different in respects to the OTA positions as well as the need to "flip" the OTA direction once it is moves from East to West. When this occurs, your image is now reversed. Therefore, depending on whether or not you "flip" the OTA over, your adjustments may or may not change. A fork mounted scope never reverses the image while moving from E to W and eliminates the possibility of having to reverse your adjustments.

#17 Lightning

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Posted 31 January 2013 - 02:36 AM

Thanks Jerry, that makes sense!

#18 corduroy

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Posted 26 April 2014 - 10:59 AM

Hey all, do you think this method will work on a curved bolt barn door tracker like this? I believe the barn door tracker is rotating along the RA axis. I have my barn door mounted to a pan/tilt head on a a tripod so I can adjust the azimuth and altitude albeit not precisely.

Posted Image

The DARV instructions states to move the mount to the west and then to the east. Is moving W or E the same as rotating about the RA axis CW or CCW?






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