| Gregk |
| (Pooh-Bah) |
| 07/01/09 06:01 PM |
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Any one using a Meade AR-5 or AR-6 to image with w
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Sounds crazy but I was considering buying a used Meade AR-5 for imaging and using a minus violet filter to remove some of the CA...Any examples of this out there or for that matter any other make/brand of Acromatic being used for AP work
Thanks
Greg
| ScopenChuck |
| (super member) |
| 07/02/09 12:49 AM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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Just did these the other night. Meade AR5 with focal reducer on LXD75 mount. DSI II color. 30 second exposures. Processed with Nebulosity
M8
| ScopenChuck |
| (super member) |
| 07/02/09 12:52 AM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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M20
| ScopenChuck |
| (super member) |
| 07/02/09 12:52 AM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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M27
| mark Jimenez |
| (sage) |
| 07/02/09 11:51 AM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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Chuck,
Those are great shots!! for any scope! and with thirty second exposures! I had no idea an achro with minus violet filter could do so well with a color imager. Ive always wished I could use an Orion ST 120 with a M.V. filter. Does anyone know if this has been tried?
-Mark
| Gregk |
| (Pooh-Bah) |
| 07/02/09 12:22 PM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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Hi Chuck,
Thanks That's very impressive...did you use any Photoshop actions in addition to remove any halos....
Also I typically go out to 3 or 4 minutes of exposure
Can I stack for instance a LP Filter (ex. Lumicon Sky Glow)with a Minus Violet
with sucess...
Greg
| Gregk |
| (Pooh-Bah) |
| 07/02/09 01:12 PM |
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Re: Any one using a Meade AR-5 or AR-6 to image wi
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Hi Mark,
The Ca presence is due to aperture size and if the focal length is short resulting in a a faster scope then the ca will get more Prominent
Greg
| Richard Turner |
| (member) |
| 07/02/09 03:54 PM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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The AR-5 is a much lighter optical tube. I've had both the AR-5 and AR-6 (I currently have an Ar-5). The Ar-6 is a heavy scope (about 24 pounds). The Ar-5 is only 15 pounds.
Also, my Ar-5 is f/9.3, while the Ar-6 is f/8. I have less chromatism with my Ar-5 than I had with the Ar-6.
| Gregk |
| (Pooh-Bah) |
| 07/02/09 05:51 PM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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Thanks Richard...Sounds like the AR-5 is teh better way to go.
I don't like heavy...greg
| ScopenChuck |
| (super member) |
| 07/02/09 11:17 PM |
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Re: Any one using a Meade AR-5 or AR-6 to image with w
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Thanks for the comments. Looking back I see that I did not have my Minus Violet filter in. The image train was as follow's. AR5 telescope - focal reducer - IR filter - DSI II color camera. Used Envisage to capture. Saved as BMP. Processed with Nebulosity which I just purchased that same night. Had no idea what I was doing. Still need to read manual. There is an action in Nebulosity to tighten stars which does seem to help. The only halos I seem to get are from very bright stars but I do not find them to be a problem.