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M13 from Parsippany with 4" f/28 Schief

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#1 StarDusty

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Posted 05 August 2013 - 08:51 PM

Here is my first attempt at imaging a DSO using a very very slow home made 4" f/28 Schiefspiegler telescope. This image has been reduced in size for posting on this site.

Image data: 20 lights, 180 seconds x ISO 1600 each. Stacked with only 5 darks and NO flats. [I have not recorded any flats yet with this optical train.]

If you want to learn more about the telescope used, go here:

http://www.clearskyo...-schiefspiegler

The focal length of this small telescope is approximately 117 inches. A little longer than a C11 SCT, but shorter than a C14 SCT.

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#2 srosenfraz

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Posted 06 August 2013 - 01:06 AM

Quite impressive Allen - I haven't ever seen an image on this forum from a homemade scope, let alone a scope with a name I could possibly spell correctly! Very novel, and your image is quite good. You chose your target well.

#3 StarDusty

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Posted 06 August 2013 - 10:59 AM

Thanks Scott,

I have not posted a DSO image here before. I just thought this image taken with a very slow telescope with long-ish focal length [for its size] might be of interest to this group.

#4 jgraham

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Posted 06 August 2013 - 12:10 PM

Coolness! If nothing else it shows that there isn't any noticeable astigmatism. The resolution looks very good. I've got a set of antique 5" blanks that I have been holding onto for years with the thought my making a Schiefspiegler. One of these days...

#5 StarDusty

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Posted 06 August 2013 - 12:55 PM

There is a yahoo group for Schief's. Go here for them.

http://tech.groups.y...schiefbuilders/

They helped and supported me each step of the way.

#6 Falcon-

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Posted 06 August 2013 - 04:34 PM

I have not posted a DSO image here before. I just thought this image taken with a very slow telescope with long-ish focal length [for its size] might be of interest to this group.


You are right, it is interesting! :) Thanks for sharing it.

#7 avarakin

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Posted 07 August 2013 - 09:52 PM

Allen,
Looks great, very nice processing!
Alex

#8 fco_star

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Posted 08 August 2013 - 07:41 AM

Very nice image, thanks for sharing the telescope link!






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